diff options
Diffstat (limited to 'drivers')
33 files changed, 3920 insertions, 292 deletions
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index a47e6ee98b8..0357ac44638 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -55,6 +55,16 @@ config COMMON_CLK_MAX77686 ---help--- This driver supports Maxim 77686 crystal oscillator clock. +config COMMON_CLK_SI5351 + tristate "Clock driver for SiLabs 5351A/B/C" + depends on I2C + depends on OF + select REGMAP_I2C + select RATIONAL + ---help--- + This driver supports Silicon Labs 5351A/B/C programmable clock + generators. + config CLK_TWL6040 tristate "External McPDM functional clock from twl6040" depends on TWL6040_CORE @@ -63,6 +73,14 @@ config CLK_TWL6040 McPDM. McPDM module is using the external bit clock on the McPDM bus as functional clock. +config COMMON_CLK_AXI_CLKGEN + tristate "AXI clkgen driver" + depends on ARCH_ZYNQ || MICROBLAZE + help + ---help--- + Support for the Analog Devices axi-clkgen pcore clock generator for Xilinx + FPGAs. It is commonly used in Analog Devices' reference designs. + endmenu source "drivers/clk/mvebu/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 300d4775d92..e7f7fe9b2f0 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_COMMON_CLK) += clk-fixed-factor.o obj-$(CONFIG_COMMON_CLK) += clk-fixed-rate.o obj-$(CONFIG_COMMON_CLK) += clk-gate.o obj-$(CONFIG_COMMON_CLK) += clk-mux.o +obj-$(CONFIG_COMMON_CLK) += clk-composite.o # SoCs specific obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835.o @@ -23,6 +24,7 @@ ifeq ($(CONFIG_COMMON_CLK), y) obj-$(CONFIG_ARCH_MMP) += mmp/ endif obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o +obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_ARCH_U8500) += ux500/ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o @@ -31,6 +33,8 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_X86) += x86/ # Chip specific +obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o +obj-$(CONFIG_COMMON_CLK_SI5351) += clk-si5351.o obj-$(CONFIG_CLK_TWL6040) += clk-twl6040.o diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c new file mode 100644 index 00000000000..8137327847c --- /dev/null +++ b/drivers/clk/clk-axi-clkgen.c @@ -0,0 +1,331 @@ +/* + * AXI clkgen driver + * + * Copyright 2012-2013 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + * + */ + +#include <linux/platform_device.h> +#include <linux/clk-provider.h> +#include <linux/clk.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/module.h> +#include <linux/err.h> + +#define AXI_CLKGEN_REG_UPDATE_ENABLE 0x04 +#define AXI_CLKGEN_REG_CLK_OUT1 0x08 +#define AXI_CLKGEN_REG_CLK_OUT2 0x0c +#define AXI_CLKGEN_REG_CLK_DIV 0x10 +#define AXI_CLKGEN_REG_CLK_FB1 0x14 +#define AXI_CLKGEN_REG_CLK_FB2 0x18 +#define AXI_CLKGEN_REG_LOCK1 0x1c +#define AXI_CLKGEN_REG_LOCK2 0x20 +#define AXI_CLKGEN_REG_LOCK3 0x24 +#define AXI_CLKGEN_REG_FILTER1 0x28 +#define AXI_CLKGEN_REG_FILTER2 0x2c + +struct axi_clkgen { + void __iomem *base; + struct clk_hw clk_hw; +}; + +static uint32_t axi_clkgen_lookup_filter(unsigned int m) +{ + switch (m) { + case 0: + return 0x01001990; + case 1: + return 0x01001190; + case 2: + return 0x01009890; + case 3: + return 0x01001890; + case 4: + return 0x01008890; + case 5 ... 8: + return 0x01009090; + case 9 ... 11: + return 0x01000890; + case 12: + return 0x08009090; + case 13 ... 22: + return 0x01001090; + case 23 ... 36: + return 0x01008090; + case 37 ... 46: + return 0x08001090; + default: + return 0x08008090; + } +} + +static const uint32_t axi_clkgen_lock_table[] = { + 0x060603e8, 0x060603e8, 0x080803e8, 0x0b0b03e8, + 0x0e0e03e8, 0x111103e8, 0x131303e8, 0x161603e8, + 0x191903e8, 0x1c1c03e8, 0x1f1f0384, 0x1f1f0339, + 0x1f1f02ee, 0x1f1f02bc, 0x1f1f028a, 0x1f1f0271, + 0x1f1f023f, 0x1f1f0226, 0x1f1f020d, 0x1f1f01f4, + 0x1f1f01db, 0x1f1f01c2, 0x1f1f01a9, 0x1f1f0190, + 0x1f1f0190, 0x1f1f0177, 0x1f1f015e, 0x1f1f015e, + 0x1f1f0145, 0x1f1f0145, 0x1f1f012c, 0x1f1f012c, + 0x1f1f012c, 0x1f1f0113, 0x1f1f0113, 0x1f1f0113, +}; + +static uint32_t axi_clkgen_lookup_lock(unsigned int m) +{ + if (m < ARRAY_SIZE(axi_clkgen_lock_table)) + return axi_clkgen_lock_table[m]; + return 0x1f1f00fa; +} + +static const unsigned int fpfd_min = 10000; +static const unsigned int fpfd_max = 300000; +static const unsigned int fvco_min = 600000; +static const unsigned int fvco_max = 1200000; + +static void axi_clkgen_calc_params(unsigned long fin, unsigned long fout, + unsigned int *best_d, unsigned int *best_m, unsigned int *best_dout) +{ + unsigned long d, d_min, d_max, _d_min, _d_max; + unsigned long m, m_min, m_max; + unsigned long f, dout, best_f, fvco; + + fin /= 1000; + fout /= 1000; + + best_f = ULONG_MAX; + *best_d = 0; + *best_m = 0; + *best_dout = 0; + + d_min = max_t(unsigned long, DIV_ROUND_UP(fin, fpfd_max), 1); + d_max = min_t(unsigned long, fin / fpfd_min, 80); + + m_min = max_t(unsigned long, DIV_ROUND_UP(fvco_min, fin) * d_min, 1); + m_max = min_t(unsigned long, fvco_max * d_max / fin, 64); + + for (m = m_min; m <= m_max; m++) { + _d_min = max(d_min, DIV_ROUND_UP(fin * m, fvco_max)); + _d_max = min(d_max, fin * m / fvco_min); + + for (d = _d_min; d <= _d_max; d++) { + fvco = fin * m / d; + + dout = DIV_ROUND_CLOSEST(fvco, fout); + dout = clamp_t(unsigned long, dout, 1, 128); + f = fvco / dout; + if (abs(f - fout) < abs(best_f - fout)) { + best_f = f; + *best_d = d; + *best_m = m; + *best_dout = dout; + if (best_f == fout) + return; + } + } + } +} + +static void axi_clkgen_calc_clk_params(unsigned int divider, unsigned int *low, + unsigned int *high, unsigned int *edge, unsigned int *nocount) +{ + if (divider == 1) + *nocount = 1; + else + *nocount = 0; + + *high = divider / 2; + *edge = divider % 2; + *low = divider - *high; +} + +static void axi_clkgen_write(struct axi_clkgen *axi_clkgen, + unsigned int reg, unsigned int val) +{ + writel(val, axi_clkgen->base + reg); +} + +static void axi_clkgen_read(struct axi_clkgen *axi_clkgen, + unsigned int reg, unsigned int *val) +{ + *val = readl(axi_clkgen->base + reg); +} + +static struct axi_clkgen *clk_hw_to_axi_clkgen(struct clk_hw *clk_hw) +{ + return container_of(clk_hw, struct axi_clkgen, clk_hw); +} + +static int axi_clkgen_set_rate(struct clk_hw *clk_hw, + unsigned long rate, unsigned long parent_rate) +{ + struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(clk_hw); + unsigned int d, m, dout; + unsigned int nocount; + unsigned int high; + unsigned int edge; + unsigned int low; + uint32_t filter; + uint32_t lock; + + if (parent_rate == 0 || rate == 0) + return -EINVAL; + + axi_clkgen_calc_params(parent_rate, rate, &d, &m, &dout); + + if (d == 0 || dout == 0 || m == 0) + return -EINVAL; + + filter = axi_clkgen_lookup_filter(m - 1); + lock = axi_clkgen_lookup_lock(m - 1); + + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_UPDATE_ENABLE, 0); + + axi_clkgen_calc_clk_params(dout, &low, &high, &edge, &nocount); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_CLK_OUT1, + (high << 6) | low); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_CLK_OUT2, + (edge << 7) | (nocount << 6)); + + axi_clkgen_calc_clk_params(d, &low, &high, &edge, &nocount); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_CLK_DIV, + (edge << 13) | (nocount << 12) | (high << 6) | low); + + axi_clkgen_calc_clk_params(m, &low, &high, &edge, &nocount); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_CLK_FB1, + (high << 6) | low); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_CLK_FB2, + (edge << 7) | (nocount << 6)); + + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_LOCK1, lock & 0x3ff); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_LOCK2, + (((lock >> 16) & 0x1f) << 10) | 0x1); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_LOCK3, + (((lock >> 24) & 0x1f) << 10) | 0x3e9); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_FILTER1, filter >> 16); + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_FILTER2, filter); + + axi_clkgen_write(axi_clkgen, AXI_CLKGEN_REG_UPDATE_ENABLE, 1); + + return 0; +} + +static long axi_clkgen_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + unsigned int d, m, dout; + + axi_clkgen_calc_params(*parent_rate, rate, &d, &m, &dout); + + if (d == 0 || dout == 0 || m == 0) + return -EINVAL; + + return *parent_rate / d * m / dout; +} + +static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw, + unsigned long parent_rate) +{ + struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(clk_hw); + unsigned int d, m, dout; + unsigned int reg; + unsigned long long tmp; + + axi_clkgen_read(axi_clkgen, AXI_CLKGEN_REG_CLK_OUT1, ®); + dout = (reg & 0x3f) + ((reg >> 6) & 0x3f); + axi_clkgen_read(axi_clkgen, AXI_CLKGEN_REG_CLK_DIV, ®); + d = (reg & 0x3f) + ((reg >> 6) & 0x3f); + axi_clkgen_read(axi_clkgen, AXI_CLKGEN_REG_CLK_FB1, ®); + m = (reg & 0x3f) + ((reg >> 6) & 0x3f); + + if (d == 0 || dout == 0) + return 0; + + tmp = (unsigned long long)(parent_rate / d) * m; + do_div(tmp, dout); + + if (tmp > ULONG_MAX) + return ULONG_MAX; + + return tmp; +} + +static const struct clk_ops axi_clkgen_ops = { + .recalc_rate = axi_clkgen_recalc_rate, + .round_rate = axi_clkgen_round_rate, + .set_rate = axi_clkgen_set_rate, +}; + +static int axi_clkgen_probe(struct platform_device *pdev) +{ + struct axi_clkgen *axi_clkgen; + struct clk_init_data init; + const char *parent_name; + const char *clk_name; + struct resource *mem; + struct clk *clk; + + axi_clkgen = devm_kzalloc(&pdev->dev, sizeof(*axi_clkgen), GFP_KERNEL); + if (!axi_clkgen) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + axi_clkgen->base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(axi_clkgen->base)) + return PTR_ERR(axi_clkgen->base); + + parent_name = of_clk_get_parent_name(pdev->dev.of_node, 0); + if (!parent_name) + return -EINVAL; + + clk_name = pdev->dev.of_node->name; + of_property_read_string(pdev->dev.of_node, "clock-output-names", + &clk_name); + + init.name = clk_name; + init.ops = &axi_clkgen_ops; + init.flags = 0; + init.parent_names = &parent_name; + init.num_parents = 1; + + axi_clkgen->clk_hw.init = &init; + clk = devm_clk_register(&pdev->dev, &axi_clkgen->clk_hw); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + return of_clk_add_provider(pdev->dev.of_node, of_clk_src_simple_get, + clk); +} + +static int axi_clkgen_remove(struct platform_device *pdev) +{ + of_clk_del_provider(pdev->dev.of_node); + + return 0; +} + +static const struct of_device_id axi_clkgen_ids[] = { + { .compatible = "adi,axi-clkgen-1.00.a" }, + { }, +}; +MODULE_DEVICE_TABLE(of, axi_clkgen_ids); + +static struct platform_driver axi_clkgen_driver = { + .driver = { + .name = "adi-axi-clkgen", + .owner = THIS_MODULE, + .of_match_table = axi_clkgen_ids, + }, + .probe = axi_clkgen_probe, + .remove = axi_clkgen_remove, +}; +module_platform_driver(axi_clkgen_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Driver for the Analog Devices' AXI clkgen pcore clock generator"); diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c new file mode 100644 index 00000000000..a33f46f20a4 --- /dev/null +++ b/drivers/clk/clk-composite.c @@ -0,0 +1,210 @@ +/* + * Copyright (c) 2013 NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/slab.h> + +#define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw) + +static u8 clk_composite_get_parent(struct clk_hw *hw) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *mux_ops = composite->mux_ops; + struct clk_hw *mux_hw = composite->mux_hw; + + mux_hw->clk = hw->clk; + + return mux_ops->get_parent(mux_hw); +} + +static int clk_composite_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *mux_ops = composite->mux_ops; + struct clk_hw *mux_hw = composite->mux_hw; + + mux_hw->clk = hw->clk; + + return mux_ops->set_parent(mux_hw, index); +} + +static unsigned long clk_composite_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *rate_ops = composite->rate_ops; + struct clk_hw *rate_hw = composite->rate_hw; + + rate_hw->clk = hw->clk; + + return rate_ops->recalc_rate(rate_hw, parent_rate); +} + +static long clk_composite_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *rate_ops = composite->rate_ops; + struct clk_hw *rate_hw = composite->rate_hw; + + rate_hw->clk = hw->clk; + + return rate_ops->round_rate(rate_hw, rate, prate); +} + +static int clk_composite_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *rate_ops = composite->rate_ops; + struct clk_hw *rate_hw = composite->rate_hw; + + rate_hw->clk = hw->clk; + + return rate_ops->set_rate(rate_hw, rate, parent_rate); +} + +static int clk_composite_is_enabled(struct clk_hw *hw) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *gate_ops = composite->gate_ops; + struct clk_hw *gate_hw = composite->gate_hw; + + gate_hw->clk = hw->clk; + + return gate_ops->is_enabled(gate_hw); +} + +static int clk_composite_enable(struct clk_hw *hw) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *gate_ops = composite->gate_ops; + struct clk_hw *gate_hw = composite->gate_hw; + + gate_hw->clk = hw->clk; + + return gate_ops->enable(gate_hw); +} + +static void clk_composite_disable(struct clk_hw *hw) +{ + struct clk_composite *composite = to_clk_composite(hw); + const struct clk_ops *gate_ops = composite->gate_ops; + struct clk_hw *gate_hw = composite->gate_hw; + + gate_hw->clk = hw->clk; + + gate_ops->disable(gate_hw); +} + +struct clk *clk_register_composite(struct device *dev, const char *name, + const char **parent_names, int num_parents, + struct clk_hw *mux_hw, const struct clk_ops *mux_ops, + struct clk_hw *rate_hw, const struct clk_ops *rate_ops, + struct clk_hw *gate_hw, const struct clk_ops *gate_ops, + unsigned long flags) +{ + struct clk *clk; + struct clk_init_data init; + struct clk_composite *composite; + struct clk_ops *clk_composite_ops; + + composite = kzalloc(sizeof(*composite), GFP_KERNEL); + if (!composite) { + pr_err("%s: could not allocate composite clk\n", __func__); + return ERR_PTR(-ENOMEM); + } + + init.name = name; + init.flags = flags | CLK_IS_BASIC; + init.parent_names = parent_names; + init.num_parents = num_parents; + + clk_composite_ops = &composite->ops; + + if (mux_hw && mux_ops) { + if (!mux_ops->get_parent || !mux_ops->set_parent) { + clk = ERR_PTR(-EINVAL); + goto err; + } + + composite->mux_hw = mux_hw; + composite->mux_ops = mux_ops; + clk_composite_ops->get_parent = clk_composite_get_parent; + clk_composite_ops->set_parent = clk_composite_set_parent; + } + + if (rate_hw && rate_ops) { + if (!rate_ops->recalc_rate) { + clk = ERR_PTR(-EINVAL); + goto err; + } + + /* .round_rate is a prerequisite for .set_rate */ + if (rate_ops->round_rate) { + clk_composite_ops->round_rate = clk_composite_round_rate; + if (rate_ops->set_rate) { + clk_composite_ops->set_rate = clk_composite_set_rate; + } + } else { + WARN(rate_ops->set_rate, + "%s: missing round_rate op is required\n", + __func__); + } + + composite->rate_hw = rate_hw; + composite->rate_ops = rate_ops; + clk_composite_ops->recalc_rate = clk_composite_recalc_rate; + } + + if (gate_hw && gate_ops) { + if (!gate_ops->is_enabled || !gate_ops->enable || + !gate_ops->disable) { + clk = ERR_PTR(-EINVAL); + goto err; + } + + composite->gate_hw = gate_hw; + composite->gate_ops = gate_ops; + clk_composite_ops->is_enabled = clk_composite_is_enabled; + clk_composite_ops->enable = clk_composite_enable; + clk_composite_ops->disable = clk_composite_disable; + } + + init.ops = clk_composite_ops; + composite->hw.init = &init; + + clk = clk_register(dev, &composite->hw); + if (IS_ERR(clk)) + goto err; + + if (composite->mux_hw) + composite->mux_hw->clk = clk; + + if (composite->rate_hw) + composite->rate_hw->clk = clk; + + if (composite->gate_hw) + composite->gate_hw->clk = clk; + + return clk; + +err: + kfree(composite); + return clk; +} diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c index 68b40210117..6d967416043 100644 --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -109,8 +109,9 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw, div = _get_div(divider, val); if (!div) { - WARN(1, "%s: Invalid divisor for clock %s\n", __func__, - __clk_get_name(hw->clk)); + WARN(!(divider->flags & CLK_DIVIDER_ALLOW_ZERO), + "%s: Zero divisor and CLK_DIVIDER_ALLOW_ZERO not set\n", + __clk_get_name(hw->clk)); return parent_rate; } diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c index 1ef271e4759..9ff7d510faa 100644 --- a/drivers/clk/clk-fixed-factor.c +++ b/drivers/clk/clk-fixed-factor.c @@ -11,6 +11,7 @@ #include <linux/clk-provider.h> #include <linux/slab.h> #include <linux/err.h> +#include <linux/of.h> /* * DOC: basic fixed multiplier and divider clock that cannot gate @@ -96,3 +97,38 @@ struct clk *clk_register_fixed_factor(struct device *dev, const char *name, return clk; } +#ifdef CONFIG_OF +/** + * of_fixed_factor_clk_setup() - Setup function for simple fixed factor clock + */ +void __init of_fixed_factor_clk_setup(struct device_node *node) +{ + struct clk *clk; + const char *clk_name = node->name; + const char *parent_name; + u32 div, mult; + + if (of_property_read_u32(node, "clock-div", &div)) { + pr_err("%s Fixed factor clock <%s> must have a clock-div property\n", + __func__, node->name); + return; + } + + if (of_property_read_u32(node, "clock-mult", &mult)) { + pr_err("%s Fixed factor clock <%s> must have a clokc-mult property\n", + __func__, node->name); + return; + } + + of_property_read_string(node, "clock-output-names", &clk_name); + parent_name = of_clk_get_parent_name(node, 0); + + clk = clk_register_fixed_factor(NULL, clk_name, parent_name, 0, + mult, div); + if (!IS_ERR(clk)) + of_clk_add_provider(node, of_clk_src_simple_get, clk); +} +EXPORT_SYMBOL_GPL(of_fixed_factor_clk_setup); +CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock", + of_fixed_factor_clk_setup); +#endif diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c index 508c032edce..25b1734560d 100644 --- a/drivers/clk/clk-mux.c +++ b/drivers/clk/clk-mux.c @@ -32,6 +32,7 @@ static u8 clk_mux_get_parent(struct clk_hw *hw) { struct clk_mux *mux = to_clk_mux(hw); + int num_parents = __clk_get_num_parents(hw->clk); u32 val; /* @@ -42,7 +43,16 @@ static u8 clk_mux_get_parent(struct clk_hw *hw) * val = 0x4 really means "bit 2, index starts at bit 0" */ val = readl(mux->reg) >> mux->shift; - val &= (1 << mux->width) - 1; + val &= mux->mask; + + if (mux->table) { + int i; + + for (i = 0; i < num_parents; i++) + if (mux->table[i] == val) + return i; + return -EINVAL; + } if (val && (mux->flags & CLK_MUX_INDEX_BIT)) val = ffs(val) - 1; @@ -50,7 +60,7 @@ static u8 clk_mux_get_parent(struct clk_hw *hw) if (val && (mux->flags & CLK_MUX_INDEX_ONE)) val--; - if (val >= __clk_get_num_parents(hw->clk)) + if (val >= num_parents) return -EINVAL; return val; @@ -62,17 +72,22 @@ static int clk_mux_set_parent(struct clk_hw *hw, u8 index) u32 val; unsigned long flags = 0; - if (mux->flags & CLK_MUX_INDEX_BIT) - index = (1 << ffs(index)); + if (mux->table) + index = mux->table[index]; - if (mux->flags & CLK_MUX_INDEX_ONE) - index++; + else { + if (mux->flags & CLK_MUX_INDEX_BIT) + index = (1 << ffs(index)); + + if (mux->flags & CLK_MUX_INDEX_ONE) + index++; + } if (mux->lock) spin_lock_irqsave(mux->lock, flags); val = readl(mux->reg); - val &= ~(((1 << mux->width) - 1) << mux->shift); + val &= ~(mux->mask << mux->shift); val |= index << mux->shift; writel(val, mux->reg); @@ -88,10 +103,10 @@ const struct clk_ops clk_mux_ops = { }; EXPORT_SYMBOL_GPL(clk_mux_ops); -struct clk *clk_register_mux(struct device *dev, const char *name, +struct clk *clk_register_mux_table(struct device *dev, const char *name, const char **parent_names, u8 num_parents, unsigned long flags, - void __iomem *reg, u8 shift, u8 width, - u8 clk_mux_flags, spinlock_t *lock) + void __iomem *reg, u8 shift, u32 mask, + u8 clk_mux_flags, u32 *table, spinlock_t *lock) { struct clk_mux *mux; struct clk *clk; @@ -113,9 +128,10 @@ struct clk *clk_register_mux(struct device *dev, const char *name, /* struct clk_mux assignments */ mux->reg = reg; mux->shift = shift; - mux->width = width; + mux->mask = mask; mux->flags = clk_mux_flags; mux->lock = lock; + mux->table = table; mux->hw.init = &init; clk = clk_register(dev, &mux->hw); @@ -125,3 +141,15 @@ struct clk *clk_register_mux(struct device *dev, const char *name, return clk; } + +struct clk *clk_register_mux(struct device *dev, const char *name, + const char **parent_names, u8 num_parents, unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_mux_flags, spinlock_t *lock) +{ + u32 mask = BIT(width) - 1; + + return clk_register_mux_table(dev, name, parent_names, num_parents, + flags, reg, shift, mask, clk_mux_flags, + NULL, lock); +} diff --git a/drivers/clk/clk-prima2.c b/drivers/clk/clk-prima2.c index f8e9d0c27be..643ca653fef 100644 --- a/drivers/clk/clk-prima2.c +++ b/drivers/clk/clk-prima2.c @@ -1113,7 +1113,7 @@ void __init sirfsoc_of_clk_init(void) for (i = pll1; i < maxclk; i++) { prima2_clks[i] = clk_register(NULL, prima2_clk_hw_array[i]); - BUG_ON(!prima2_clks[i]); + BUG_ON(IS_ERR(prima2_clks[i])); } clk_register_clkdev(prima2_clks[cpu], NULL, "cpu"); clk_register_clkdev(prima2_clks[io], NULL, "io"); diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c new file mode 100644 index 00000000000..892728412e9 --- /dev/null +++ b/drivers/clk/clk-si5351.c @@ -0,0 +1,1510 @@ +/* + * clk-si5351.c: Silicon Laboratories Si5351A/B/C I2C Clock Generator + * + * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> + * Rabeeh Khoury <rabeeh@solid-run.com> + * + * References: + * [1] "Si5351A/B/C Data Sheet" + * http://www.silabs.com/Support%20Documents/TechnicalDocs/Si5351.pdf + * [2] "Manually Generating an Si5351 Register Map" + * http://www.silabs.com/Support%20Documents/TechnicalDocs/AN619.pdf + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/clkdev.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/rational.h> +#include <linux/i2c.h> +#include <linux/of_platform.h> +#include <linux/platform_data/si5351.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <asm/div64.h> + +#include "clk-si5351.h" + +struct si5351_driver_data; + +struct si5351_parameters { + unsigned long p1; + unsigned long p2; + unsigned long p3; + int valid; +}; + +struct si5351_hw_data { + struct clk_hw hw; + struct si5351_driver_data *drvdata; + struct si5351_parameters params; + unsigned char num; +}; + +struct si5351_driver_data { + enum si5351_variant variant; + struct i2c_client *client; + struct regmap *regmap; + struct clk_onecell_data onecell; + + struct clk *pxtal; + const char *pxtal_name; + struct clk_hw xtal; + struct clk *pclkin; + const char *pclkin_name; + struct clk_hw clkin; + + struct si5351_hw_data pll[2]; + struct si5351_hw_data *msynth; + struct si5351_hw_data *clkout; +}; + +static const char const *si5351_input_names[] = { + "xtal", "clkin" +}; +static const char const *si5351_pll_names[] = { + "plla", "pllb", "vxco" +}; +static const char const *si5351_msynth_names[] = { + "ms0", "ms1", "ms2", "ms3", "ms4", "ms5", "ms6", "ms7" +}; +static const char const *si5351_clkout_names[] = { + "clk0", "clk1", "clk2", "clk3", "clk4", "clk5", "clk6", "clk7" +}; + +/* + * Si5351 i2c regmap + */ +static inline u8 si5351_reg_read(struct si5351_driver_data *drvdata, u8 reg) +{ + u32 val; + int ret; + + ret = regmap_read(drvdata->regmap, reg, &val); + if (ret) { + dev_err(&drvdata->client->dev, + "unable to read from reg%02x\n", reg); + return 0; + } + + return (u8)val; +} + +static inline int si5351_bulk_read(struct si5351_driver_data *drvdata, + u8 reg, u8 count, u8 *buf) +{ + return regmap_bulk_read(drvdata->regmap, reg, buf, count); +} + +static inline int si5351_reg_write(struct si5351_driver_data *drvdata, + u8 reg, u8 val) +{ + return regmap_write(drvdata->regmap, reg, val); +} + +static inline int si5351_bulk_write(struct si5351_driver_data *drvdata, + u8 reg, u8 count, const u8 *buf) +{ + return regmap_raw_write(drvdata->regmap, reg, buf, count); +} + +static inline int si5351_set_bits(struct si5351_driver_data *drvdata, + u8 reg, u8 mask, u8 val) +{ + return regmap_update_bits(drvdata->regmap, reg, mask, val); +} + +static inline u8 si5351_msynth_params_address(int num) +{ + if (num > 5) + return SI5351_CLK6_PARAMETERS + (num - 6); + return SI5351_CLK0_PARAMETERS + (SI5351_PARAMETERS_LENGTH * num); +} + +static void si5351_read_parameters(struct si5351_driver_data *drvdata, + u8 reg, struct si5351_parameters *params) +{ + u8 buf[SI5351_PARAMETERS_LENGTH]; + + switch (reg) { + case SI5351_CLK6_PARAMETERS: + case SI5351_CLK7_PARAMETERS: + buf[0] = si5351_reg_read(drvdata, reg); + params->p1 = buf[0]; + params->p2 = 0; + params->p3 = 1; + break; + default: + si5351_bulk_read(drvdata, reg, SI5351_PARAMETERS_LENGTH, buf); + params->p1 = ((buf[2] & 0x03) << 16) | (buf[3] << 8) | buf[4]; + params->p2 = ((buf[5] & 0x0f) << 16) | (buf[6] << 8) | buf[7]; + params->p3 = ((buf[5] & 0xf0) << 12) | (buf[0] << 8) | buf[1]; + } + params->valid = 1; +} + +static void si5351_write_parameters(struct si5351_driver_data *drvdata, + u8 reg, struct si5351_parameters *params) +{ + u8 buf[SI5351_PARAMETERS_LENGTH]; + + switch (reg) { + case SI5351_CLK6_PARAMETERS: + case SI5351_CLK7_PARAMETERS: + buf[0] = params->p1 & 0xff; + si5351_reg_write(drvdata, reg, buf[0]); + break; + default: + buf[0] = ((params->p3 & 0x0ff00) >> 8) & 0xff; + buf[1] = params->p3 & 0xff; + /* save rdiv and divby4 */ + buf[2] = si5351_reg_read(drvdata, reg + 2) & ~0x03; + buf[2] |= ((params->p1 & 0x30000) >> 16) & 0x03; + buf[3] = ((params->p1 & 0x0ff00) >> 8) & 0xff; + buf[4] = params->p1 & 0xff; + buf[5] = ((params->p3 & 0xf0000) >> 12) | + ((params->p2 & 0xf0000) >> 16); + buf[6] = ((params->p2 & 0x0ff00) >> 8) & 0xff; + buf[7] = params->p2 & 0xff; + si5351_bulk_write(drvdata, reg, SI5351_PARAMETERS_LENGTH, buf); + } +} + +static bool si5351_regmap_is_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SI5351_DEVICE_STATUS: + case SI5351_INTERRUPT_STATUS: + case SI5351_PLL_RESET: + return true; + } + return false; +} + +static bool si5351_regmap_is_writeable(struct device *dev, unsigned int reg) +{ + /* reserved registers */ + if (reg >= 4 && reg <= 8) + return false; + if (reg >= 10 && reg <= 14) + return false; + if (reg >= 173 && reg <= 176) + return false; + if (reg >= 178 && reg <= 182) + return false; + /* read-only */ + if (reg == SI5351_DEVICE_STATUS) + return false; + return true; +} + +static struct regmap_config si5351_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + .max_register = 187, + .writeable_reg = si5351_regmap_is_writeable, + .volatile_reg = si5351_regmap_is_volatile, +}; + +/* + * Si5351 xtal clock input + */ +static int si5351_xtal_prepare(struct clk_hw *hw) +{ + struct si5351_driver_data *drvdata = + container_of(hw, struct si5351_driver_data, xtal); + si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, + SI5351_XTAL_ENABLE, SI5351_XTAL_ENABLE); + return 0; +} + +static void si5351_xtal_unprepare(struct clk_hw *hw) +{ + struct si5351_driver_data *drvdata = + container_of(hw, struct si5351_driver_data, xtal); + si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, + SI5351_XTAL_ENABLE, 0); +} + +static const struct clk_ops si5351_xtal_ops = { + .prepare = si5351_xtal_prepare, + .unprepare = si5351_xtal_unprepare, +}; + +/* + * Si5351 clkin clock input (Si5351C only) + */ +static int si5351_clkin_prepare(struct clk_hw *hw) +{ + struct si5351_driver_data *drvdata = + container_of(hw, struct si5351_driver_data, clkin); + si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, + SI5351_CLKIN_ENABLE, SI5351_CLKIN_ENABLE); + return 0; +} + +static void si5351_clkin_unprepare(struct clk_hw *hw) +{ + struct si5351_driver_data *drvdata = + container_of(hw, struct si5351_driver_data, clkin); + si5351_set_bits(drvdata, SI5351_FANOUT_ENABLE, + SI5351_CLKIN_ENABLE, 0); +} + +/* + * CMOS clock source constraints: + * The input frequency range of the PLL is 10Mhz to 40MHz. + * If CLKIN is >40MHz, the input divider must be used. + */ +static unsigned long si5351_clkin_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct si5351_driver_data *drvdata = + container_of(hw, struct si5351_driver_data, clkin); + unsigned long rate; + unsigned char idiv; + + rate = parent_rate; + if (parent_rate > 160000000) { + idiv = SI5351_CLKIN_DIV_8; + rate /= 8; + } else if (parent_rate > 80000000) { + idiv = SI5351_CLKIN_DIV_4; + rate /= 4; + } else if (parent_rate > 40000000) { + idiv = SI5351_CLKIN_DIV_2; + rate /= 2; + } else { + idiv = SI5351_CLKIN_DIV_1; + } + + si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, + SI5351_CLKIN_DIV_MASK, idiv); + + dev_dbg(&drvdata->client->dev, "%s - clkin div = %d, rate = %lu\n", + __func__, (1 << (idiv >> 6)), rate); + + return rate; +} + +static const struct clk_ops si5351_clkin_ops = { + .prepare = si5351_clkin_prepare, + .unprepare = si5351_clkin_unprepare, + .recalc_rate = si5351_clkin_recalc_rate, +}; + +/* + * Si5351 vxco clock input (Si5351B only) + */ + +static int si5351_vxco_prepare(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + + dev_warn(&hwdata->drvdata->client->dev, "VXCO currently unsupported\n"); + + return 0; +} + +static void si5351_vxco_unprepare(struct clk_hw *hw) +{ +} + +static unsigned long si5351_vxco_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return 0; +} + +static int si5351_vxco_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent) +{ + return 0; +} + +static const struct clk_ops si5351_vxco_ops = { + .prepare = si5351_vxco_prepare, + .unprepare = si5351_vxco_unprepare, + .recalc_rate = si5351_vxco_recalc_rate, + .set_rate = si5351_vxco_set_rate, +}; + +/* + * Si5351 pll a/b + * + * Feedback Multisynth Divider Equations [2] + * + * fVCO = fIN * (a + b/c) + * + * with 15 + 0/1048575 <= (a + b/c) <= 90 + 0/1048575 and + * fIN = fXTAL or fIN = fCLKIN/CLKIN_DIV + * + * Feedback Multisynth Register Equations + * + * (1) MSNx_P1[17:0] = 128 * a + floor(128 * b/c) - 512 + * (2) MSNx_P2[19:0] = 128 * b - c * floor(128 * b/c) = (128*b) mod c + * (3) MSNx_P3[19:0] = c + * + * Transposing (2) yields: (4) floor(128 * b/c) = (128 * b / MSNx_P2)/c + * + * Using (4) on (1) yields: + * MSNx_P1 = 128 * a + (128 * b/MSNx_P2)/c - 512 + * MSNx_P1 + 512 + MSNx_P2/c = 128 * a + 128 * b/c + * + * a + b/c = (MSNx_P1 + MSNx_P2/MSNx_P3 + 512)/128 + * = (MSNx_P1*MSNx_P3 + MSNx_P2 + 512*MSNx_P3)/(128*MSNx_P3) + * + */ +static int _si5351_pll_reparent(struct si5351_driver_data *drvdata, + int num, enum si5351_pll_src parent) +{ + u8 mask = (num == 0) ? SI5351_PLLA_SOURCE : SI5351_PLLB_SOURCE; + + if (parent == SI5351_PLL_SRC_DEFAULT) + return 0; + + if (num > 2) + return -EINVAL; + + if (drvdata->variant != SI5351_VARIANT_C && + parent != SI5351_PLL_SRC_XTAL) + return -EINVAL; + + si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, mask, + (parent == SI5351_PLL_SRC_XTAL) ? 0 : mask); + return 0; +} + +static unsigned char si5351_pll_get_parent(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 mask = (hwdata->num == 0) ? SI5351_PLLA_SOURCE : SI5351_PLLB_SOURCE; + u8 val; + + val = si5351_reg_read(hwdata->drvdata, SI5351_PLL_INPUT_SOURCE); + + return (val & mask) ? 1 : 0; +} + +static int si5351_pll_set_parent(struct clk_hw *hw, u8 index) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + + if (hwdata->drvdata->variant != SI5351_VARIANT_C && + index > 0) + return -EPERM; + + if (index > 1) + return -EINVAL; + + return _si5351_pll_reparent(hwdata->drvdata, hwdata->num, + (index == 0) ? SI5351_PLL_SRC_XTAL : + SI5351_PLL_SRC_CLKIN); +} + +static unsigned long si5351_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 reg = (hwdata->num == 0) ? SI5351_PLLA_PARAMETERS : + SI5351_PLLB_PARAMETERS; + unsigned long long rate; + + if (!hwdata->params.valid) + si5351_read_parameters(hwdata->drvdata, reg, &hwdata->params); + + if (hwdata->params.p3 == 0) + return parent_rate; + + /* fVCO = fIN * (P1*P3 + 512*P3 + P2)/(128*P3) */ + rate = hwdata->params.p1 * hwdata->params.p3; + rate += 512 * hwdata->params.p3; + rate += hwdata->params.p2; + rate *= parent_rate; + do_div(rate, 128 * hwdata->params.p3); + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), + hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, + parent_rate, (unsigned long)rate); + + return (unsigned long)rate; +} + +static long si5351_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + unsigned long rfrac, denom, a, b, c; + unsigned long long lltmp; + + if (rate < SI5351_PLL_VCO_MIN) + rate = SI5351_PLL_VCO_MIN; + if (rate > SI5351_PLL_VCO_MAX) + rate = SI5351_PLL_VCO_MAX; + + /* determine integer part of feedback equation */ + a = rate / *parent_rate; + + if (a < SI5351_PLL_A_MIN) + rate = *parent_rate * SI5351_PLL_A_MIN; + if (a > SI5351_PLL_A_MAX) + rate = *parent_rate * SI5351_PLL_A_MAX; + + /* find best approximation for b/c = fVCO mod fIN */ + denom = 1000 * 1000; + lltmp = rate % (*parent_rate); + lltmp *= denom; + do_div(lltmp, *parent_rate); + rfrac = (unsigned long)lltmp; + + b = 0; + c = 1; + if (rfrac) + rational_best_approximation(rfrac, denom, + SI5351_PLL_B_MAX, SI5351_PLL_C_MAX, &b, &c); + + /* calculate parameters */ + hwdata->params.p3 = c; + hwdata->params.p2 = (128 * b) % c; + hwdata->params.p1 = 128 * a; + hwdata->params.p1 += (128 * b / c); + hwdata->params.p1 -= 512; + + /* recalculate rate by fIN * (a + b/c) */ + lltmp = *parent_rate; + lltmp *= b; + do_div(lltmp, c); + + rate = (unsigned long)lltmp; + rate += *parent_rate * a; + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: a = %lu, b = %lu, c = %lu, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), a, b, c, + *parent_rate, rate); + + return rate; +} + +static int si5351_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 reg = (hwdata->num == 0) ? SI5351_PLLA_PARAMETERS : + SI5351_PLLB_PARAMETERS; + + /* write multisynth parameters */ + si5351_write_parameters(hwdata->drvdata, reg, &hwdata->params); + + /* plla/pllb ctrl is in clk6/clk7 ctrl registers */ + si5351_set_bits(hwdata->drvdata, SI5351_CLK6_CTRL + hwdata->num, + SI5351_CLK_INTEGER_MODE, + (hwdata->params.p2 == 0) ? SI5351_CLK_INTEGER_MODE : 0); + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), + hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, + parent_rate, rate); + + return 0; +} + +static const struct clk_ops si5351_pll_ops = { + .set_parent = si5351_pll_set_parent, + .get_parent = si5351_pll_get_parent, + .recalc_rate = si5351_pll_recalc_rate, + .round_rate = si5351_pll_round_rate, + .set_rate = si5351_pll_set_rate, +}; + +/* + * Si5351 multisync divider + * + * for fOUT <= 150 MHz: + * + * fOUT = (fIN * (a + b/c)) / CLKOUTDIV + * + * with 6 + 0/1048575 <= (a + b/c) <= 1800 + 0/1048575 and + * fIN = fVCO0, fVCO1 + * + * Output Clock Multisynth Register Equations + * + * MSx_P1[17:0] = 128 * a + floor(128 * b/c) - 512 + * MSx_P2[19:0] = 128 * b - c * floor(128 * b/c) = (128*b) mod c + * MSx_P3[19:0] = c + * + * MS[6,7] are integer (P1) divide only, P2 = 0, P3 = 0 + * + * for 150MHz < fOUT <= 160MHz: + * + * MSx_P1 = 0, MSx_P2 = 0, MSx_P3 = 1, MSx_INT = 1, MSx_DIVBY4 = 11b + */ +static int _si5351_msynth_reparent(struct si5351_driver_data *drvdata, + int num, enum si5351_multisynth_src parent) +{ + if (parent == SI5351_MULTISYNTH_SRC_DEFAULT) + return 0; + + if (num > 8) + return -EINVAL; + + si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, SI5351_CLK_PLL_SELECT, + (parent == SI5351_MULTISYNTH_SRC_VCO0) ? 0 : + SI5351_CLK_PLL_SELECT); + return 0; +} + +static unsigned char si5351_msynth_get_parent(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 val; + + val = si5351_reg_read(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num); + + return (val & SI5351_CLK_PLL_SELECT) ? 1 : 0; +} + +static int si5351_msynth_set_parent(struct clk_hw *hw, u8 index) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + + return _si5351_msynth_reparent(hwdata->drvdata, hwdata->num, + (index == 0) ? SI5351_MULTISYNTH_SRC_VCO0 : + SI5351_MULTISYNTH_SRC_VCO1); +} + +static unsigned long si5351_msynth_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 reg = si5351_msynth_params_address(hwdata->num); + unsigned long long rate; + unsigned long m; + + if (!hwdata->params.valid) + si5351_read_parameters(hwdata->drvdata, reg, &hwdata->params); + + if (hwdata->params.p3 == 0) + return parent_rate; + + /* + * multisync0-5: fOUT = (128 * P3 * fIN) / (P1*P3 + P2 + 512*P3) + * multisync6-7: fOUT = fIN / P1 + */ + rate = parent_rate; + if (hwdata->num > 5) { + m = hwdata->params.p1; + } else if ((si5351_reg_read(hwdata->drvdata, reg + 2) & + SI5351_OUTPUT_CLK_DIVBY4) == SI5351_OUTPUT_CLK_DIVBY4) { + m = 4; + } else { + rate *= 128 * hwdata->params.p3; + m = hwdata->params.p1 * hwdata->params.p3; + m += hwdata->params.p2; + m += 512 * hwdata->params.p3; + } + + if (m == 0) + return 0; + do_div(rate, m); + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, m = %lu, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), + hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, + m, parent_rate, (unsigned long)rate); + + return (unsigned long)rate; +} + +static long si5351_msynth_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + unsigned long long lltmp; + unsigned long a, b, c; + int divby4; + + /* multisync6-7 can only handle freqencies < 150MHz */ + if (hwdata->num >= 6 && rate > SI5351_MULTISYNTH67_MAX_FREQ) + rate = SI5351_MULTISYNTH67_MAX_FREQ; + + /* multisync frequency is 1MHz .. 160MHz */ + if (rate > SI5351_MULTISYNTH_MAX_FREQ) + rate = SI5351_MULTISYNTH_MAX_FREQ; + if (rate < SI5351_MULTISYNTH_MIN_FREQ) + rate = SI5351_MULTISYNTH_MIN_FREQ; + + divby4 = 0; + if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ) + divby4 = 1; + + /* multisync can set pll */ + if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) { + /* + * find largest integer divider for max + * vco frequency and given target rate + */ + if (divby4 == 0) { + lltmp = SI5351_PLL_VCO_MAX; + do_div(lltmp, rate); + a = (unsigned long)lltmp; + } else + a = 4; + + b = 0; + c = 1; + + *parent_rate = a * rate; + } else { + unsigned long rfrac, denom; + + /* disable divby4 */ + if (divby4) { + rate = SI5351_MULTISYNTH_DIVBY4_FREQ; + divby4 = 0; + } + + /* determine integer part of divider equation */ + a = *parent_rate / rate; + if (a < SI5351_MULTISYNTH_A_MIN) + a = SI5351_MULTISYNTH_A_MIN; + if (hwdata->num >= 6 && a > SI5351_MULTISYNTH67_A_MAX) + a = SI5351_MULTISYNTH67_A_MAX; + else if (a > SI5351_MULTISYNTH_A_MAX) + a = SI5351_MULTISYNTH_A_MAX; + + /* find best approximation for b/c = fVCO mod fOUT */ + denom = 1000 * 1000; + lltmp = (*parent_rate) % rate; + lltmp *= denom; + do_div(lltmp, rate); + rfrac = (unsigned long)lltmp; + + b = 0; + c = 1; + if (rfrac) + rational_best_approximation(rfrac, denom, + SI5351_MULTISYNTH_B_MAX, SI5351_MULTISYNTH_C_MAX, + &b, &c); + } + + /* recalculate rate by fOUT = fIN / (a + b/c) */ + lltmp = *parent_rate; + lltmp *= c; + do_div(lltmp, a * c + b); + rate = (unsigned long)lltmp; + + /* calculate parameters */ + if (divby4) { + hwdata->params.p3 = 1; + hwdata->params.p2 = 0; + hwdata->params.p1 = 0; + } else { + hwdata->params.p3 = c; + hwdata->params.p2 = (128 * b) % c; + hwdata->params.p1 = 128 * a; + hwdata->params.p1 += (128 * b / c); + hwdata->params.p1 -= 512; + } + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: a = %lu, b = %lu, c = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), a, b, c, divby4, + *parent_rate, rate); + + return rate; +} + +static int si5351_msynth_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + u8 reg = si5351_msynth_params_address(hwdata->num); + int divby4 = 0; + + /* write multisynth parameters */ + si5351_write_parameters(hwdata->drvdata, reg, &hwdata->params); + + if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ) + divby4 = 1; + + /* enable/disable integer mode and divby4 on multisynth0-5 */ + if (hwdata->num < 6) { + si5351_set_bits(hwdata->drvdata, reg + 2, + SI5351_OUTPUT_CLK_DIVBY4, + (divby4) ? SI5351_OUTPUT_CLK_DIVBY4 : 0); + si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, + SI5351_CLK_INTEGER_MODE, + (hwdata->params.p2 == 0) ? SI5351_CLK_INTEGER_MODE : 0); + } + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, divby4 = %d, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), + hwdata->params.p1, hwdata->params.p2, hwdata->params.p3, + divby4, parent_rate, rate); + + return 0; +} + +static const struct clk_ops si5351_msynth_ops = { + .set_parent = si5351_msynth_set_parent, + .get_parent = si5351_msynth_get_parent, + .recalc_rate = si5351_msynth_recalc_rate, + .round_rate = si5351_msynth_round_rate, + .set_rate = si5351_msynth_set_rate, +}; + +/* + * Si5351 clkout divider + */ +static int _si5351_clkout_reparent(struct si5351_driver_data *drvdata, + int num, enum si5351_clkout_src parent) +{ + u8 val; + + if (num > 8) + return -EINVAL; + + switch (parent) { + case SI5351_CLKOUT_SRC_MSYNTH_N: + val = SI5351_CLK_INPUT_MULTISYNTH_N; + break; + case SI5351_CLKOUT_SRC_MSYNTH_0_4: + /* clk0/clk4 can only connect to its own multisync */ + if (num == 0 || num == 4) + val = SI5351_CLK_INPUT_MULTISYNTH_N; + else + val = SI5351_CLK_INPUT_MULTISYNTH_0_4; + break; + case SI5351_CLKOUT_SRC_XTAL: + val = SI5351_CLK_INPUT_XTAL; + break; + case SI5351_CLKOUT_SRC_CLKIN: + if (drvdata->variant != SI5351_VARIANT_C) + return -EINVAL; + + val = SI5351_CLK_INPUT_CLKIN; + break; + default: + return 0; + } + + si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, + SI5351_CLK_INPUT_MASK, val); + return 0; +} + +static int _si5351_clkout_set_drive_strength( + struct si5351_driver_data *drvdata, int num, + enum si5351_drive_strength drive) +{ + u8 mask; + + if (num > 8) + return -EINVAL; + + switch (drive) { + case SI5351_DRIVE_2MA: + mask = SI5351_CLK_DRIVE_STRENGTH_2MA; + break; + case SI5351_DRIVE_4MA: + mask = SI5351_CLK_DRIVE_STRENGTH_4MA; + break; + case SI5351_DRIVE_6MA: + mask = SI5351_CLK_DRIVE_STRENGTH_6MA; + break; + case SI5351_DRIVE_8MA: + mask = SI5351_CLK_DRIVE_STRENGTH_8MA; + break; + default: + return 0; + } + + si5351_set_bits(drvdata, SI5351_CLK0_CTRL + num, + SI5351_CLK_DRIVE_STRENGTH_MASK, mask); + return 0; +} + +static int si5351_clkout_prepare(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + + si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, + SI5351_CLK_POWERDOWN, 0); + si5351_set_bits(hwdata->drvdata, SI5351_OUTPUT_ENABLE_CTRL, + (1 << hwdata->num), 0); + return 0; +} + +static void si5351_clkout_unprepare(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + + si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, + SI5351_CLK_POWERDOWN, SI5351_CLK_POWERDOWN); + si5351_set_bits(hwdata->drvdata, SI5351_OUTPUT_ENABLE_CTRL, + (1 << hwdata->num), (1 << hwdata->num)); +} + +static u8 si5351_clkout_get_parent(struct clk_hw *hw) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + int index = 0; + unsigned char val; + + val = si5351_reg_read(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num); + switch (val & SI5351_CLK_INPUT_MASK) { + case SI5351_CLK_INPUT_MULTISYNTH_N: + index = 0; + break; + case SI5351_CLK_INPUT_MULTISYNTH_0_4: + index = 1; + break; + case SI5351_CLK_INPUT_XTAL: + index = 2; + break; + case SI5351_CLK_INPUT_CLKIN: + index = 3; + break; + } + + return index; +} + +static int si5351_clkout_set_parent(struct clk_hw *hw, u8 index) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + enum si5351_clkout_src parent = SI5351_CLKOUT_SRC_DEFAULT; + + switch (index) { + case 0: + parent = SI5351_CLKOUT_SRC_MSYNTH_N; + break; + case 1: + parent = SI5351_CLKOUT_SRC_MSYNTH_0_4; + break; + case 2: + parent = SI5351_CLKOUT_SRC_XTAL; + break; + case 3: + parent = SI5351_CLKOUT_SRC_CLKIN; + break; + } + + return _si5351_clkout_reparent(hwdata->drvdata, hwdata->num, parent); +} + +static unsigned long si5351_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + unsigned char reg; + unsigned char rdiv; + + if (hwdata->num > 5) + reg = si5351_msynth_params_address(hwdata->num) + 2; + else + reg = SI5351_CLK6_7_OUTPUT_DIVIDER; + + rdiv = si5351_reg_read(hwdata->drvdata, reg); + if (hwdata->num == 6) { + rdiv &= SI5351_OUTPUT_CLK6_DIV_MASK; + } else { + rdiv &= SI5351_OUTPUT_CLK_DIV_MASK; + rdiv >>= SI5351_OUTPUT_CLK_DIV_SHIFT; + } + + return parent_rate >> rdiv; +} + +static long si5351_clkout_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + unsigned char rdiv; + + /* clkout6/7 can only handle output freqencies < 150MHz */ + if (hwdata->num >= 6 && rate > SI5351_CLKOUT67_MAX_FREQ) + rate = SI5351_CLKOUT67_MAX_FREQ; + + /* clkout freqency is 8kHz - 160MHz */ + if (rate > SI5351_CLKOUT_MAX_FREQ) + rate = SI5351_CLKOUT_MAX_FREQ; + if (rate < SI5351_CLKOUT_MIN_FREQ) + rate = SI5351_CLKOUT_MIN_FREQ; + + /* request frequency if multisync master */ + if (__clk_get_flags(hwdata->hw.clk) & CLK_SET_RATE_PARENT) { + /* use r divider for frequencies below 1MHz */ + rdiv = SI5351_OUTPUT_CLK_DIV_1; + while (rate < SI5351_MULTISYNTH_MIN_FREQ && + rdiv < SI5351_OUTPUT_CLK_DIV_128) { + rdiv += 1; + rate *= 2; + } + *parent_rate = rate; + } else { + unsigned long new_rate, new_err, err; + + /* round to closed rdiv */ + rdiv = SI5351_OUTPUT_CLK_DIV_1; + new_rate = *parent_rate; + err = abs(new_rate - rate); + do { + new_rate >>= 1; + new_err = abs(new_rate - rate); + if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128) + break; + rdiv++; + err = new_err; + } while (1); + } + rate = *parent_rate >> rdiv; + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv), + *parent_rate, rate); + + return rate; +} + +static int si5351_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct si5351_hw_data *hwdata = + container_of(hw, struct si5351_hw_data, hw); + unsigned long new_rate, new_err, err; + unsigned char rdiv; + + /* round to closed rdiv */ + rdiv = SI5351_OUTPUT_CLK_DIV_1; + new_rate = parent_rate; + err = abs(new_rate - rate); + do { + new_rate >>= 1; + new_err = abs(new_rate - rate); + if (new_err > err || rdiv == SI5351_OUTPUT_CLK_DIV_128) + break; + rdiv++; + err = new_err; + } while (1); + + /* write output divider */ + switch (hwdata->num) { + case 6: + si5351_set_bits(hwdata->drvdata, SI5351_CLK6_7_OUTPUT_DIVIDER, + SI5351_OUTPUT_CLK6_DIV_MASK, rdiv); + break; + case 7: + si5351_set_bits(hwdata->drvdata, SI5351_CLK6_7_OUTPUT_DIVIDER, + SI5351_OUTPUT_CLK_DIV_MASK, + rdiv << SI5351_OUTPUT_CLK_DIV_SHIFT); + break; + default: + si5351_set_bits(hwdata->drvdata, + si5351_msynth_params_address(hwdata->num) + 2, + SI5351_OUTPUT_CLK_DIV_MASK, + rdiv << SI5351_OUTPUT_CLK_DIV_SHIFT); + } + + /* powerup clkout */ + si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num, + SI5351_CLK_POWERDOWN, 0); + + dev_dbg(&hwdata->drvdata->client->dev, + "%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n", + __func__, __clk_get_name(hwdata->hw.clk), (1 << rdiv), + parent_rate, rate); + + return 0; +} + +static const struct clk_ops si5351_clkout_ops = { + .prepare = si5351_clkout_prepare, + .unprepare = si5351_clkout_unprepare, + .set_parent = si5351_clkout_set_parent, + .get_parent = si5351_clkout_get_parent, + .recalc_rate = si5351_clkout_recalc_rate, + .round_rate = si5351_clkout_round_rate, + .set_rate = si5351_clkout_set_rate, +}; + +/* + * Si5351 i2c probe and DT + */ +#ifdef CONFIG_OF +static const struct of_device_id si5351_dt_ids[] = { + { .compatible = "silabs,si5351a", .data = (void *)SI5351_VARIANT_A, }, + { .compatible = "silabs,si5351a-msop", + .data = (void *)SI5351_VARIANT_A3, }, + { .compatible = "silabs,si5351b", .data = (void *)SI5351_VARIANT_B, }, + { .compatible = "silabs,si5351c", .data = (void *)SI5351_VARIANT_C, }, + { } +}; +MODULE_DEVICE_TABLE(of, si5351_dt_ids); + +static int si5351_dt_parse(struct i2c_client *client) +{ + struct device_node *child, *np = client->dev.of_node; + struct si5351_platform_data *pdata; + const struct of_device_id *match; + struct property *prop; + const __be32 *p; + int num = 0; + u32 val; + + if (np == NULL) + return 0; + + match = of_match_node(si5351_dt_ids, np); + if (match == NULL) + return -EINVAL; + + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->variant = (enum si5351_variant)match->data; + pdata->clk_xtal = of_clk_get(np, 0); + if (!IS_ERR(pdata->clk_xtal)) + clk_put(pdata->clk_xtal); + pdata->clk_clkin = of_clk_get(np, 1); + if (!IS_ERR(pdata->clk_clkin)) + clk_put(pdata->clk_clkin); + + /* + * property silabs,pll-source : <num src>, [<..>] + * allow to selectively set pll source + */ + of_property_for_each_u32(np, "silabs,pll-source", prop, p, num) { + if (num >= 2) { + dev_err(&client->dev, + "invalid pll %d on pll-source prop\n", num); + return -EINVAL; + } + + p = of_prop_next_u32(prop, p, &val); + if (!p) { + dev_err(&client->dev, + "missing pll-source for pll %d\n", num); + return -EINVAL; + } + + switch (val) { + case 0: + pdata->pll_src[num] = SI5351_PLL_SRC_XTAL; + break; + case 1: + if (pdata->variant != SI5351_VARIANT_C) { + dev_err(&client->dev, + "invalid parent %d for pll %d\n", + val, num); + return -EINVAL; + } + pdata->pll_src[num] = SI5351_PLL_SRC_CLKIN; + break; + default: + dev_err(&client->dev, + "invalid parent %d for pll %d\n", val, num); + return -EINVAL; + } + } + + /* per clkout properties */ + for_each_child_of_node(np, child) { + if (of_property_read_u32(child, "reg", &num)) { + dev_err(&client->dev, "missing reg property of %s\n", + child->name); + return -EINVAL; + } + + if (num >= 8 || + (pdata->variant == SI5351_VARIANT_A3 && num >= 3)) { + dev_err(&client->dev, "invalid clkout %d\n", num); + return -EINVAL; + } + + if (!of_property_read_u32(child, "silabs,multisynth-source", + &val)) { + switch (val) { + case 0: + pdata->clkout[num].multisynth_src = + SI5351_MULTISYNTH_SRC_VCO0; + break; + case 1: + pdata->clkout[num].multisynth_src = + SI5351_MULTISYNTH_SRC_VCO1; + break; + default: + dev_err(&client->dev, + "invalid parent %d for multisynth %d\n", + val, num); + return -EINVAL; + } + } + + if (!of_property_read_u32(child, "silabs,clock-source", &val)) { + switch (val) { + case 0: + pdata->clkout[num].clkout_src = + SI5351_CLKOUT_SRC_MSYNTH_N; + break; + case 1: + pdata->clkout[num].clkout_src = + SI5351_CLKOUT_SRC_MSYNTH_0_4; + break; + case 2: + pdata->clkout[num].clkout_src = + SI5351_CLKOUT_SRC_XTAL; + break; + case 3: + if (pdata->variant != SI5351_VARIANT_C) { + dev_err(&client->dev, + "invalid parent %d for clkout %d\n", + val, num); + return -EINVAL; + } + pdata->clkout[num].clkout_src = + SI5351_CLKOUT_SRC_CLKIN; + break; + default: + dev_err(&client->dev, + "invalid parent %d for clkout %d\n", + val, num); + return -EINVAL; + } + } + + if (!of_property_read_u32(child, "silabs,drive-strength", + &val)) { + switch (val) { + case SI5351_DRIVE_2MA: + case SI5351_DRIVE_4MA: + case SI5351_DRIVE_6MA: + case SI5351_DRIVE_8MA: + pdata->clkout[num].drive = val; + break; + default: + dev_err(&client->dev, + "invalid drive strength %d for clkout %d\n", + val, num); + return -EINVAL; + } + } + + if (!of_property_read_u32(child, "clock-frequency", &val)) + pdata->clkout[num].rate = val; + + pdata->clkout[num].pll_master = + of_property_read_bool(child, "silabs,pll-master"); + } + client->dev.platform_data = pdata; + + return 0; +} +#else +static int si5351_dt_parse(struct i2c_client *client) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int si5351_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct si5351_platform_data *pdata; + struct si5351_driver_data *drvdata; + struct clk_init_data init; + struct clk *clk; + const char *parent_names[4]; + u8 num_parents, num_clocks; + int ret, n; + + ret = si5351_dt_parse(client); + if (ret) + return ret; + + pdata = client->dev.platform_data; + if (!pdata) + return -EINVAL; + + drvdata = devm_kzalloc(&client->dev, sizeof(*drvdata), GFP_KERNEL); + if (drvdata == NULL) { + dev_err(&client->dev, "unable to allocate driver data\n"); + return -ENOMEM; + } + + i2c_set_clientdata(client, drvdata); + drvdata->client = client; + drvdata->variant = pdata->variant; + drvdata->pxtal = pdata->clk_xtal; + drvdata->pclkin = pdata->clk_clkin; + + drvdata->regmap = devm_regmap_init_i2c(client, &si5351_regmap_config); + if (IS_ERR(drvdata->regmap)) { + dev_err(&client->dev, "failed to allocate register map\n"); + return PTR_ERR(drvdata->regmap); + } + + /* Disable interrupts */ + si5351_reg_write(drvdata, SI5351_INTERRUPT_MASK, 0xf0); + /* Set disabled output drivers to drive low */ + si5351_reg_write(drvdata, SI5351_CLK3_0_DISABLE_STATE, 0x00); + si5351_reg_write(drvdata, SI5351_CLK7_4_DISABLE_STATE, 0x00); + /* Ensure pll select is on XTAL for Si5351A/B */ + if (drvdata->variant != SI5351_VARIANT_C) + si5351_set_bits(drvdata, SI5351_PLL_INPUT_SOURCE, + SI5351_PLLA_SOURCE | SI5351_PLLB_SOURCE, 0); + + /* setup clock configuration */ + for (n = 0; n < 2; n++) { + ret = _si5351_pll_reparent(drvdata, n, pdata->pll_src[n]); + if (ret) { + dev_err(&client->dev, + "failed to reparent pll %d to %d\n", + n, pdata->pll_src[n]); + return ret; + } + } + + for (n = 0; n < 8; n++) { + ret = _si5351_msynth_reparent(drvdata, n, + pdata->clkout[n].multisynth_src); + if (ret) { + dev_err(&client->dev, + "failed to reparent multisynth %d to %d\n", + n, pdata->clkout[n].multisynth_src); + return ret; + } + + ret = _si5351_clkout_reparent(drvdata, n, + pdata->clkout[n].clkout_src); + if (ret) { + dev_err(&client->dev, + "failed to reparent clkout %d to %d\n", + n, pdata->clkout[n].clkout_src); + return ret; + } + + ret = _si5351_clkout_set_drive_strength(drvdata, n, + pdata->clkout[n].drive); + if (ret) { + dev_err(&client->dev, + "failed set drive strength of clkout%d to %d\n", + n, pdata->clkout[n].drive); + return ret; + } + } + + /* register xtal input clock gate */ + memset(&init, 0, sizeof(init)); + init.name = si5351_input_names[0]; + init.ops = &si5351_xtal_ops; + init.flags = 0; + if (!IS_ERR(drvdata->pxtal)) { + drvdata->pxtal_name = __clk_get_name(drvdata->pxtal); + init.parent_names = &drvdata->pxtal_name; + init.num_parents = 1; + } + drvdata->xtal.init = &init; + clk = devm_clk_register(&client->dev, &drvdata->xtal); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", init.name); + return PTR_ERR(clk); + } + + /* register clkin input clock gate */ + if (drvdata->variant == SI5351_VARIANT_C) { + memset(&init, 0, sizeof(init)); + init.name = si5351_input_names[1]; + init.ops = &si5351_clkin_ops; + if (!IS_ERR(drvdata->pclkin)) { + drvdata->pclkin_name = __clk_get_name(drvdata->pclkin); + init.parent_names = &drvdata->pclkin_name; + init.num_parents = 1; + } + drvdata->clkin.init = &init; + clk = devm_clk_register(&client->dev, &drvdata->clkin); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", + init.name); + return PTR_ERR(clk); + } + } + + /* Si5351C allows to mux either xtal or clkin to PLL input */ + num_parents = (drvdata->variant == SI5351_VARIANT_C) ? 2 : 1; + parent_names[0] = si5351_input_names[0]; + parent_names[1] = si5351_input_names[1]; + + /* register PLLA */ + drvdata->pll[0].num = 0; + drvdata->pll[0].drvdata = drvdata; + drvdata->pll[0].hw.init = &init; + memset(&init, 0, sizeof(init)); + init.name = si5351_pll_names[0]; + init.ops = &si5351_pll_ops; + init.flags = 0; + init.parent_names = parent_names; + init.num_parents = num_parents; + clk = devm_clk_register(&client->dev, &drvdata->pll[0].hw); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", init.name); + return -EINVAL; + } + + /* register PLLB or VXCO (Si5351B) */ + drvdata->pll[1].num = 1; + drvdata->pll[1].drvdata = drvdata; + drvdata->pll[1].hw.init = &init; + memset(&init, 0, sizeof(init)); + if (drvdata->variant == SI5351_VARIANT_B) { + init.name = si5351_pll_names[2]; + init.ops = &si5351_vxco_ops; + init.flags = CLK_IS_ROOT; + init.parent_names = NULL; + init.num_parents = 0; + } else { + init.name = si5351_pll_names[1]; + init.ops = &si5351_pll_ops; + init.flags = 0; + init.parent_names = parent_names; + init.num_parents = num_parents; + } + clk = devm_clk_register(&client->dev, &drvdata->pll[1].hw); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", init.name); + return -EINVAL; + } + + /* register clk multisync and clk out divider */ + num_clocks = (drvdata->variant == SI5351_VARIANT_A3) ? 3 : 8; + parent_names[0] = si5351_pll_names[0]; + if (drvdata->variant == SI5351_VARIANT_B) + parent_names[1] = si5351_pll_names[2]; + else + parent_names[1] = si5351_pll_names[1]; + + drvdata->msynth = devm_kzalloc(&client->dev, num_clocks * + sizeof(*drvdata->msynth), GFP_KERNEL); + drvdata->clkout = devm_kzalloc(&client->dev, num_clocks * + sizeof(*drvdata->clkout), GFP_KERNEL); + + drvdata->onecell.clk_num = num_clocks; + drvdata->onecell.clks = devm_kzalloc(&client->dev, + num_clocks * sizeof(*drvdata->onecell.clks), GFP_KERNEL); + + if (WARN_ON(!drvdata->msynth || !drvdata->clkout || + !drvdata->onecell.clks)) + return -ENOMEM; + + for (n = 0; n < num_clocks; n++) { + drvdata->msynth[n].num = n; + drvdata->msynth[n].drvdata = drvdata; + drvdata->msynth[n].hw.init = &init; + memset(&init, 0, sizeof(init)); + init.name = si5351_msynth_names[n]; + init.ops = &si5351_msynth_ops; + init.flags = 0; + if (pdata->clkout[n].pll_master) + init.flags |= CLK_SET_RATE_PARENT; + init.parent_names = parent_names; + init.num_parents = 2; + clk = devm_clk_register(&client->dev, &drvdata->msynth[n].hw); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", + init.name); + return -EINVAL; + } + } + + num_parents = (drvdata->variant == SI5351_VARIANT_C) ? 4 : 3; + parent_names[2] = si5351_input_names[0]; + parent_names[3] = si5351_input_names[1]; + for (n = 0; n < num_clocks; n++) { + parent_names[0] = si5351_msynth_names[n]; + parent_names[1] = (n < 4) ? si5351_msynth_names[0] : + si5351_msynth_names[4]; + + drvdata->clkout[n].num = n; + drvdata->clkout[n].drvdata = drvdata; + drvdata->clkout[n].hw.init = &init; + memset(&init, 0, sizeof(init)); + init.name = si5351_clkout_names[n]; + init.ops = &si5351_clkout_ops; + init.flags = 0; + if (pdata->clkout[n].clkout_src == SI5351_CLKOUT_SRC_MSYNTH_N) + init.flags |= CLK_SET_RATE_PARENT; + init.parent_names = parent_names; + init.num_parents = num_parents; + clk = devm_clk_register(&client->dev, &drvdata->clkout[n].hw); + if (IS_ERR(clk)) { + dev_err(&client->dev, "unable to register %s\n", + init.name); + return -EINVAL; + } + drvdata->onecell.clks[n] = clk; + } + + ret = of_clk_add_provider(client->dev.of_node, of_clk_src_onecell_get, + &drvdata->onecell); + if (ret) { + dev_err(&client->dev, "unable to add clk provider\n"); + return ret; + } + + return 0; +} + +static const struct i2c_device_id si5351_i2c_ids[] = { + { "silabs,si5351", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, si5351_i2c_ids); + +static struct i2c_driver si5351_driver = { + .driver = { + .name = "si5351", + .of_match_table = of_match_ptr(si5351_dt_ids), + }, + .probe = si5351_i2c_probe, + .id_table = si5351_i2c_ids, +}; +module_i2c_driver(si5351_driver); + +MODULE_AUTHOR("Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com"); +MODULE_DESCRIPTION("Silicon Labs Si5351A/B/C clock generator driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/clk/clk-si5351.h b/drivers/clk/clk-si5351.h new file mode 100644 index 00000000000..af41b5080f4 --- /dev/null +++ b/drivers/clk/clk-si5351.h @@ -0,0 +1,155 @@ +/* + * clk-si5351.h: Silicon Laboratories Si5351A/B/C I2C Clock Generator + * + * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> + * Rabeeh Khoury <rabeeh@solid-run.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef _CLK_SI5351_H_ +#define _CLK_SI5351_H_ + +#define SI5351_BUS_BASE_ADDR 0x60 + +#define SI5351_PLL_VCO_MIN 600000000 +#define SI5351_PLL_VCO_MAX 900000000 +#define SI5351_MULTISYNTH_MIN_FREQ 1000000 +#define SI5351_MULTISYNTH_DIVBY4_FREQ 150000000 +#define SI5351_MULTISYNTH_MAX_FREQ 160000000 +#define SI5351_MULTISYNTH67_MAX_FREQ SI5351_MULTISYNTH_DIVBY4_FREQ +#define SI5351_CLKOUT_MIN_FREQ 8000 +#define SI5351_CLKOUT_MAX_FREQ SI5351_MULTISYNTH_MAX_FREQ +#define SI5351_CLKOUT67_MAX_FREQ SI5351_MULTISYNTH67_MAX_FREQ + +#define SI5351_PLL_A_MIN 15 +#define SI5351_PLL_A_MAX 90 +#define SI5351_PLL_B_MAX (SI5351_PLL_C_MAX-1) +#define SI5351_PLL_C_MAX 1048575 +#define SI5351_MULTISYNTH_A_MIN 6 +#define SI5351_MULTISYNTH_A_MAX 1800 +#define SI5351_MULTISYNTH67_A_MAX 254 +#define SI5351_MULTISYNTH_B_MAX (SI5351_MULTISYNTH_C_MAX-1) +#define SI5351_MULTISYNTH_C_MAX 1048575 +#define SI5351_MULTISYNTH_P1_MAX ((1<<18)-1) +#define SI5351_MULTISYNTH_P2_MAX ((1<<20)-1) +#define SI5351_MULTISYNTH_P3_MAX ((1<<20)-1) + +#define SI5351_DEVICE_STATUS 0 +#define SI5351_INTERRUPT_STATUS 1 +#define SI5351_INTERRUPT_MASK 2 +#define SI5351_STATUS_SYS_INIT (1<<7) +#define SI5351_STATUS_LOL_B (1<<6) +#define SI5351_STATUS_LOL_A (1<<5) +#define SI5351_STATUS_LOS (1<<4) +#define SI5351_OUTPUT_ENABLE_CTRL 3 +#define SI5351_OEB_PIN_ENABLE_CTRL 9 +#define SI5351_PLL_INPUT_SOURCE 15 +#define SI5351_CLKIN_DIV_MASK (3<<6) +#define SI5351_CLKIN_DIV_1 (0<<6) +#define SI5351_CLKIN_DIV_2 (1<<6) +#define SI5351_CLKIN_DIV_4 (2<<6) +#define SI5351_CLKIN_DIV_8 (3<<6) +#define SI5351_PLLB_SOURCE (1<<3) +#define SI5351_PLLA_SOURCE (1<<2) + +#define SI5351_CLK0_CTRL 16 +#define SI5351_CLK1_CTRL 17 +#define SI5351_CLK2_CTRL 18 +#define SI5351_CLK3_CTRL 19 +#define SI5351_CLK4_CTRL 20 +#define SI5351_CLK5_CTRL 21 +#define SI5351_CLK6_CTRL 22 +#define SI5351_CLK7_CTRL 23 +#define SI5351_CLK_POWERDOWN (1<<7) +#define SI5351_CLK_INTEGER_MODE (1<<6) +#define SI5351_CLK_PLL_SELECT (1<<5) +#define SI5351_CLK_INVERT (1<<4) +#define SI5351_CLK_INPUT_MASK (3<<2) +#define SI5351_CLK_INPUT_XTAL (0<<2) +#define SI5351_CLK_INPUT_CLKIN (1<<2) +#define SI5351_CLK_INPUT_MULTISYNTH_0_4 (2<<2) +#define SI5351_CLK_INPUT_MULTISYNTH_N (3<<2) +#define SI5351_CLK_DRIVE_STRENGTH_MASK (3<<0) +#define SI5351_CLK_DRIVE_STRENGTH_2MA (0<<0) +#define SI5351_CLK_DRIVE_STRENGTH_4MA (1<<0) +#define SI5351_CLK_DRIVE_STRENGTH_6MA (2<<0) +#define SI5351_CLK_DRIVE_STRENGTH_8MA (3<<0) + +#define SI5351_CLK3_0_DISABLE_STATE 24 +#define SI5351_CLK7_4_DISABLE_STATE 25 +#define SI5351_CLK_DISABLE_STATE_LOW 0 +#define SI5351_CLK_DISABLE_STATE_HIGH 1 +#define SI5351_CLK_DISABLE_STATE_FLOAT 2 +#define SI5351_CLK_DISABLE_STATE_NEVER 3 + +#define SI5351_PARAMETERS_LENGTH 8 +#define SI5351_PLLA_PARAMETERS 26 +#define SI5351_PLLB_PARAMETERS 34 +#define SI5351_CLK0_PARAMETERS 42 +#define SI5351_CLK1_PARAMETERS 50 +#define SI5351_CLK2_PARAMETERS 58 +#define SI5351_CLK3_PARAMETERS 66 +#define SI5351_CLK4_PARAMETERS 74 +#define SI5351_CLK5_PARAMETERS 82 +#define SI5351_CLK6_PARAMETERS 90 +#define SI5351_CLK7_PARAMETERS 91 +#define SI5351_CLK6_7_OUTPUT_DIVIDER 92 +#define SI5351_OUTPUT_CLK_DIV_MASK (7 << 4) +#define SI5351_OUTPUT_CLK6_DIV_MASK (7 << 0) +#define SI5351_OUTPUT_CLK_DIV_SHIFT 4 +#define SI5351_OUTPUT_CLK_DIV6_SHIFT 0 +#define SI5351_OUTPUT_CLK_DIV_1 0 +#define SI5351_OUTPUT_CLK_DIV_2 1 +#define SI5351_OUTPUT_CLK_DIV_4 2 +#define SI5351_OUTPUT_CLK_DIV_8 3 +#define SI5351_OUTPUT_CLK_DIV_16 4 +#define SI5351_OUTPUT_CLK_DIV_32 5 +#define SI5351_OUTPUT_CLK_DIV_64 6 +#define SI5351_OUTPUT_CLK_DIV_128 7 +#define SI5351_OUTPUT_CLK_DIVBY4 (3<<2) + +#define SI5351_SSC_PARAM0 149 +#define SI5351_SSC_PARAM1 150 +#define SI5351_SSC_PARAM2 151 +#define SI5351_SSC_PARAM3 152 +#define SI5351_SSC_PARAM4 153 +#define SI5351_SSC_PARAM5 154 +#define SI5351_SSC_PARAM6 155 +#define SI5351_SSC_PARAM7 156 +#define SI5351_SSC_PARAM8 157 +#define SI5351_SSC_PARAM9 158 +#define SI5351_SSC_PARAM10 159 +#define SI5351_SSC_PARAM11 160 +#define SI5351_SSC_PARAM12 161 + +#define SI5351_VXCO_PARAMETERS_LOW 162 +#define SI5351_VXCO_PARAMETERS_MID 163 +#define SI5351_VXCO_PARAMETERS_HIGH 164 + +#define SI5351_CLK0_PHASE_OFFSET 165 +#define SI5351_CLK1_PHASE_OFFSET 166 +#define SI5351_CLK2_PHASE_OFFSET 167 +#define SI5351_CLK3_PHASE_OFFSET 168 +#define SI5351_CLK4_PHASE_OFFSET 169 +#define SI5351_CLK5_PHASE_OFFSET 170 + +#define SI5351_PLL_RESET 177 +#define SI5351_PLL_RESET_B (1<<7) +#define SI5351_PLL_RESET_A (1<<5) + +#define SI5351_CRYSTAL_LOAD 183 +#define SI5351_CRYSTAL_LOAD_MASK (3<<6) +#define SI5351_CRYSTAL_LOAD_6PF (1<<6) +#define SI5351_CRYSTAL_LOAD_8PF (2<<6) +#define SI5351_CRYSTAL_LOAD_10PF (3<<6) + +#define SI5351_FANOUT_ENABLE 187 +#define SI5351_CLKIN_ENABLE (1<<7) +#define SI5351_XTAL_ENABLE (1<<6) +#define SI5351_MULTISYNTH_ENABLE (1<<4) + +#endif diff --git a/drivers/clk/clk-vt8500.c b/drivers/clk/clk-vt8500.c index 09c63315e57..debf688afa8 100644 --- a/drivers/clk/clk-vt8500.c +++ b/drivers/clk/clk-vt8500.c @@ -488,6 +488,7 @@ static int vtwm_pll_set_rate(struct clk_hw *hw, unsigned long rate, case PLL_TYPE_WM8750: wm8750_find_pll_bits(rate, parent_rate, &filter, &mul, &div1, &div2); pll_val = WM8750_BITS_TO_VAL(filter, mul, div1, div2); + break; default: pr_err("%s: invalid pll type\n", __func__); return 0; @@ -523,6 +524,7 @@ static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate, case PLL_TYPE_WM8750: wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2); round_rate = WM8750_BITS_TO_FREQ(*prate, mul, div1, div2); + break; default: round_rate = 0; } diff --git a/drivers/clk/clk-zynq.c b/drivers/clk/clk-zynq.c index b14a25f3925..32062977f45 100644 --- a/drivers/clk/clk-zynq.c +++ b/drivers/clk/clk-zynq.c @@ -20,6 +20,7 @@ #include <linux/slab.h> #include <linux/kernel.h> #include <linux/clk-provider.h> +#include <linux/clk/zynq.h> static void __iomem *slcr_base; diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index ed87b240580..934cfd18f72 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -19,14 +19,77 @@ #include <linux/of.h> #include <linux/device.h> #include <linux/init.h> +#include <linux/sched.h> static DEFINE_SPINLOCK(enable_lock); static DEFINE_MUTEX(prepare_lock); +static struct task_struct *prepare_owner; +static struct task_struct *enable_owner; + +static int prepare_refcnt; +static int enable_refcnt; + static HLIST_HEAD(clk_root_list); static HLIST_HEAD(clk_orphan_list); static LIST_HEAD(clk_notifier_list); +/*** locking ***/ +static void clk_prepare_lock(void) +{ + if (!mutex_trylock(&prepare_lock)) { + if (prepare_owner == current) { + prepare_refcnt++; + return; + } + mutex_lock(&prepare_lock); + } + WARN_ON_ONCE(prepare_owner != NULL); + WARN_ON_ONCE(prepare_refcnt != 0); + prepare_owner = current; + prepare_refcnt = 1; +} + +static void clk_prepare_unlock(void) +{ + WARN_ON_ONCE(prepare_owner != current); + WARN_ON_ONCE(prepare_refcnt == 0); + + if (--prepare_refcnt) + return; + prepare_owner = NULL; + mutex_unlock(&prepare_lock); +} + +static unsigned long clk_enable_lock(void) +{ + unsigned long flags; + + if (!spin_trylock_irqsave(&enable_lock, flags)) { + if (enable_owner == current) { + enable_refcnt++; + return flags; + } + spin_lock_irqsave(&enable_lock, flags); + } + WARN_ON_ONCE(enable_owner != NULL); + WARN_ON_ONCE(enable_refcnt != 0); + enable_owner = current; + enable_refcnt = 1; + return flags; +} + +static void clk_enable_unlock(unsigned long flags) +{ + WARN_ON_ONCE(enable_owner != current); + WARN_ON_ONCE(enable_refcnt == 0); + + if (--enable_refcnt) + return; + enable_owner = NULL; + spin_unlock_irqrestore(&enable_lock, flags); +} + /*** debugfs support ***/ #ifdef CONFIG_COMMON_CLK_DEBUG @@ -69,7 +132,7 @@ static int clk_summary_show(struct seq_file *s, void *data) seq_printf(s, " clock enable_cnt prepare_cnt rate\n"); seq_printf(s, "---------------------------------------------------------------------\n"); - mutex_lock(&prepare_lock); + clk_prepare_lock(); hlist_for_each_entry(c, &clk_root_list, child_node) clk_summary_show_subtree(s, c, 0); @@ -77,7 +140,7 @@ static int clk_summary_show(struct seq_file *s, void *data) hlist_for_each_entry(c, &clk_orphan_list, child_node) clk_summary_show_subtree(s, c, 0); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return 0; } @@ -130,7 +193,7 @@ static int clk_dump(struct seq_file *s, void *data) seq_printf(s, "{"); - mutex_lock(&prepare_lock); + clk_prepare_lock(); hlist_for_each_entry(c, &clk_root_list, child_node) { if (!first_node) @@ -144,7 +207,7 @@ static int clk_dump(struct seq_file *s, void *data) clk_dump_subtree(s, c, 0); } - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); seq_printf(s, "}"); return 0; @@ -280,6 +343,39 @@ out: } /** + * clk_debug_reparent - reparent clk node in the debugfs clk tree + * @clk: the clk being reparented + * @new_parent: the new clk parent, may be NULL + * + * Rename clk entry in the debugfs clk tree if debugfs has been + * initialized. Otherwise it bails out early since the debugfs clk tree + * will be created lazily by clk_debug_init as part of a late_initcall. + * + * Caller must hold prepare_lock. + */ +static void clk_debug_reparent(struct clk *clk, struct clk *new_parent) +{ + struct dentry *d; + struct dentry *new_parent_d; + + if (!inited) + return; + + if (new_parent) + new_parent_d = new_parent->dentry; + else + new_parent_d = orphandir; + + d = debugfs_rename(clk->dentry->d_parent, clk->dentry, + new_parent_d, clk->name); + if (d) + clk->dentry = d; + else + pr_debug("%s: failed to rename debugfs entry for %s\n", + __func__, clk->name); +} + +/** * clk_debug_init - lazily create the debugfs clk tree visualization * * clks are often initialized very early during boot before memory can @@ -316,7 +412,7 @@ static int __init clk_debug_init(void) if (!orphandir) return -ENOMEM; - mutex_lock(&prepare_lock); + clk_prepare_lock(); hlist_for_each_entry(clk, &clk_root_list, child_node) clk_debug_create_subtree(clk, rootdir); @@ -326,16 +422,45 @@ static int __init clk_debug_init(void) inited = 1; - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return 0; } late_initcall(clk_debug_init); #else static inline int clk_debug_register(struct clk *clk) { return 0; } +static inline void clk_debug_reparent(struct clk *clk, struct clk *new_parent) +{ +} #endif /* caller must hold prepare_lock */ +static void clk_unprepare_unused_subtree(struct clk *clk) +{ + struct clk *child; + + if (!clk) + return; + + hlist_for_each_entry(child, &clk->children, child_node) + clk_unprepare_unused_subtree(child); + + if (clk->prepare_count) + return; + + if (clk->flags & CLK_IGNORE_UNUSED) + return; + + if (__clk_is_prepared(clk)) { + if (clk->ops->unprepare_unused) + clk->ops->unprepare_unused(clk->hw); + else if (clk->ops->unprepare) + clk->ops->unprepare(clk->hw); + } +} +EXPORT_SYMBOL_GPL(__clk_get_flags); + +/* caller must hold prepare_lock */ static void clk_disable_unused_subtree(struct clk *clk) { struct clk *child; @@ -347,7 +472,7 @@ static void clk_disable_unused_subtree(struct clk *clk) hlist_for_each_entry(child, &clk->children, child_node) clk_disable_unused_subtree(child); - spin_lock_irqsave(&enable_lock, flags); + flags = clk_enable_lock(); if (clk->enable_count) goto unlock_out; @@ -368,17 +493,30 @@ static void clk_disable_unused_subtree(struct clk *clk) } unlock_out: - spin_unlock_irqrestore(&enable_lock, flags); + clk_enable_unlock(flags); out: return; } +static bool clk_ignore_unused; +static int __init clk_ignore_unused_setup(char *__unused) +{ + clk_ignore_unused = true; + return 1; +} +__setup("clk_ignore_unused", clk_ignore_unused_setup); + static int clk_disable_unused(void) { struct clk *clk; - mutex_lock(&prepare_lock); + if (clk_ignore_unused) { + pr_warn("clk: Not disabling unused clocks\n"); + return 0; + } + + clk_prepare_lock(); hlist_for_each_entry(clk, &clk_root_list, child_node) clk_disable_unused_subtree(clk); @@ -386,7 +524,13 @@ static int clk_disable_unused(void) hlist_for_each_entry(clk, &clk_orphan_list, child_node) clk_disable_unused_subtree(clk); - mutex_unlock(&prepare_lock); + hlist_for_each_entry(clk, &clk_root_list, child_node) + clk_unprepare_unused_subtree(clk); + + hlist_for_each_entry(clk, &clk_orphan_list, child_node) + clk_unprepare_unused_subtree(clk); + + clk_prepare_unlock(); return 0; } @@ -451,6 +595,27 @@ unsigned long __clk_get_flags(struct clk *clk) return !clk ? 0 : clk->flags; } +bool __clk_is_prepared(struct clk *clk) +{ + int ret; + + if (!clk) + return false; + + /* + * .is_prepared is optional for clocks that can prepare + * fall back to software usage counter if it is missing + */ + if (!clk->ops->is_prepared) { + ret = clk->prepare_count ? 1 : 0; + goto out; + } + + ret = clk->ops->is_prepared(clk->hw); +out: + return !!ret; +} + bool __clk_is_enabled(struct clk *clk) { int ret; @@ -548,9 +713,9 @@ void __clk_unprepare(struct clk *clk) */ void clk_unprepare(struct clk *clk) { - mutex_lock(&prepare_lock); + clk_prepare_lock(); __clk_unprepare(clk); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); } EXPORT_SYMBOL_GPL(clk_unprepare); @@ -596,9 +761,9 @@ int clk_prepare(struct clk *clk) { int ret; - mutex_lock(&prepare_lock); + clk_prepare_lock(); ret = __clk_prepare(clk); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -640,9 +805,9 @@ void clk_disable(struct clk *clk) { unsigned long flags; - spin_lock_irqsave(&enable_lock, flags); + flags = clk_enable_lock(); __clk_disable(clk); - spin_unlock_irqrestore(&enable_lock, flags); + clk_enable_unlock(flags); } EXPORT_SYMBOL_GPL(clk_disable); @@ -693,9 +858,9 @@ int clk_enable(struct clk *clk) unsigned long flags; int ret; - spin_lock_irqsave(&enable_lock, flags); + flags = clk_enable_lock(); ret = __clk_enable(clk); - spin_unlock_irqrestore(&enable_lock, flags); + clk_enable_unlock(flags); return ret; } @@ -740,9 +905,9 @@ long clk_round_rate(struct clk *clk, unsigned long rate) { unsigned long ret; - mutex_lock(&prepare_lock); + clk_prepare_lock(); ret = __clk_round_rate(clk, rate); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -837,13 +1002,13 @@ unsigned long clk_get_rate(struct clk *clk) { unsigned long rate; - mutex_lock(&prepare_lock); + clk_prepare_lock(); if (clk && (clk->flags & CLK_GET_RATE_NOCACHE)) __clk_recalc_rates(clk, 0); rate = __clk_get_rate(clk); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return rate; } @@ -876,16 +1041,16 @@ static int __clk_speculate_rates(struct clk *clk, unsigned long parent_rate) else new_rate = parent_rate; - /* abort the rate change if a driver returns NOTIFY_BAD */ + /* abort rate change if a driver returns NOTIFY_BAD or NOTIFY_STOP */ if (clk->notifier_count) ret = __clk_notify(clk, PRE_RATE_CHANGE, clk->rate, new_rate); - if (ret == NOTIFY_BAD) + if (ret & NOTIFY_STOP_MASK) goto out; hlist_for_each_entry(child, &clk->children, child_node) { ret = __clk_speculate_rates(child, new_rate); - if (ret == NOTIFY_BAD) + if (ret & NOTIFY_STOP_MASK) break; } @@ -974,11 +1139,11 @@ static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long even int ret = NOTIFY_DONE; if (clk->rate == clk->new_rate) - return 0; + return NULL; if (clk->notifier_count) { ret = __clk_notify(clk, event, clk->rate, clk->new_rate); - if (ret == NOTIFY_BAD) + if (ret & NOTIFY_STOP_MASK) fail_clk = clk; } @@ -1048,7 +1213,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate) int ret = 0; /* prevent racing with updates to the clock topology */ - mutex_lock(&prepare_lock); + clk_prepare_lock(); /* bail early if nothing to do */ if (rate == clk->rate) @@ -1080,7 +1245,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate) clk_change_rate(top); out: - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -1096,9 +1261,9 @@ struct clk *clk_get_parent(struct clk *clk) { struct clk *parent; - mutex_lock(&prepare_lock); + clk_prepare_lock(); parent = __clk_get_parent(clk); - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return parent; } @@ -1162,16 +1327,8 @@ out: return ret; } -void __clk_reparent(struct clk *clk, struct clk *new_parent) +static void clk_reparent(struct clk *clk, struct clk *new_parent) { -#ifdef CONFIG_COMMON_CLK_DEBUG - struct dentry *d; - struct dentry *new_parent_d; -#endif - - if (!clk || !new_parent) - return; - hlist_del(&clk->child_node); if (new_parent) @@ -1179,39 +1336,20 @@ void __clk_reparent(struct clk *clk, struct clk *new_parent) else hlist_add_head(&clk->child_node, &clk_orphan_list); -#ifdef CONFIG_COMMON_CLK_DEBUG - if (!inited) - goto out; - - if (new_parent) - new_parent_d = new_parent->dentry; - else - new_parent_d = orphandir; - - d = debugfs_rename(clk->dentry->d_parent, clk->dentry, - new_parent_d, clk->name); - if (d) - clk->dentry = d; - else - pr_debug("%s: failed to rename debugfs entry for %s\n", - __func__, clk->name); -out: -#endif - clk->parent = new_parent; +} +void __clk_reparent(struct clk *clk, struct clk *new_parent) +{ + clk_reparent(clk, new_parent); + clk_debug_reparent(clk, new_parent); __clk_recalc_rates(clk, POST_RATE_CHANGE); } -static int __clk_set_parent(struct clk *clk, struct clk *parent) +static u8 clk_fetch_parent_index(struct clk *clk, struct clk *parent) { - struct clk *old_parent; - unsigned long flags; - int ret = -EINVAL; u8 i; - old_parent = clk->parent; - if (!clk->parents) clk->parents = kzalloc((sizeof(struct clk*) * clk->num_parents), GFP_KERNEL); @@ -1231,36 +1369,79 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent) } } - if (i == clk->num_parents) { - pr_debug("%s: clock %s is not a possible parent of clock %s\n", - __func__, parent->name, clk->name); - goto out; - } + return i; +} - /* migrate prepare and enable */ +static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index) +{ + unsigned long flags; + int ret = 0; + struct clk *old_parent = clk->parent; + bool migrated_enable = false; + + /* migrate prepare */ if (clk->prepare_count) __clk_prepare(parent); - /* FIXME replace with clk_is_enabled(clk) someday */ - spin_lock_irqsave(&enable_lock, flags); - if (clk->enable_count) + flags = clk_enable_lock(); + + /* migrate enable */ + if (clk->enable_count) { __clk_enable(parent); - spin_unlock_irqrestore(&enable_lock, flags); + migrated_enable = true; + } + + /* update the clk tree topology */ + clk_reparent(clk, parent); + + clk_enable_unlock(flags); /* change clock input source */ - ret = clk->ops->set_parent(clk->hw, i); + if (parent && clk->ops->set_parent) + ret = clk->ops->set_parent(clk->hw, p_index); - /* clean up old prepare and enable */ - spin_lock_irqsave(&enable_lock, flags); - if (clk->enable_count) + if (ret) { + /* + * The error handling is tricky due to that we need to release + * the spinlock while issuing the .set_parent callback. This + * means the new parent might have been enabled/disabled in + * between, which must be considered when doing rollback. + */ + flags = clk_enable_lock(); + + clk_reparent(clk, old_parent); + + if (migrated_enable && clk->enable_count) { + __clk_disable(parent); + } else if (migrated_enable && (clk->enable_count == 0)) { + __clk_disable(old_parent); + } else if (!migrated_enable && clk->enable_count) { + __clk_disable(parent); + __clk_enable(old_parent); + } + + clk_enable_unlock(flags); + + if (clk->prepare_count) + __clk_unprepare(parent); + + return ret; + } + + /* clean up enable for old parent if migration was done */ + if (migrated_enable) { + flags = clk_enable_lock(); __clk_disable(old_parent); - spin_unlock_irqrestore(&enable_lock, flags); + clk_enable_unlock(flags); + } + /* clean up prepare for old parent if migration was done */ if (clk->prepare_count) __clk_unprepare(old_parent); -out: - return ret; + /* update debugfs with new clk tree topology */ + clk_debug_reparent(clk, parent); + return 0; } /** @@ -1278,44 +1459,59 @@ out: int clk_set_parent(struct clk *clk, struct clk *parent) { int ret = 0; + u8 p_index = 0; + unsigned long p_rate = 0; if (!clk || !clk->ops) return -EINVAL; - if (!clk->ops->set_parent) + /* verify ops for for multi-parent clks */ + if ((clk->num_parents > 1) && (!clk->ops->set_parent)) return -ENOSYS; /* prevent racing with updates to the clock topology */ - mutex_lock(&prepare_lock); + clk_prepare_lock(); if (clk->parent == parent) goto out; + /* check that we are allowed to re-parent if the clock is in use */ + if ((clk->flags & CLK_SET_PARENT_GATE) && clk->prepare_count) { + ret = -EBUSY; + goto out; + } + + /* try finding the new parent index */ + if (parent) { + p_index = clk_fetch_parent_index(clk, parent); + p_rate = parent->rate; + if (p_index == clk->num_parents) { + pr_debug("%s: clk %s can not be parent of clk %s\n", + __func__, parent->name, clk->name); + ret = -EINVAL; + goto out; + } + } + /* propagate PRE_RATE_CHANGE notifications */ if (clk->notifier_count) - ret = __clk_speculate_rates(clk, parent->rate); + ret = __clk_speculate_rates(clk, p_rate); /* abort if a driver objects */ - if (ret == NOTIFY_STOP) + if (ret & NOTIFY_STOP_MASK) goto out; - /* only re-parent if the clock is not in use */ - if ((clk->flags & CLK_SET_PARENT_GATE) && clk->prepare_count) - ret = -EBUSY; - else - ret = __clk_set_parent(clk, parent); + /* do the re-parent */ + ret = __clk_set_parent(clk, parent, p_index); - /* propagate ABORT_RATE_CHANGE if .set_parent failed */ - if (ret) { + /* propagate rate recalculation accordingly */ + if (ret) __clk_recalc_rates(clk, ABORT_RATE_CHANGE); - goto out; - } - - /* propagate rate recalculation downstream */ - __clk_reparent(clk, parent); + else + __clk_recalc_rates(clk, POST_RATE_CHANGE); out: - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -1338,7 +1534,7 @@ int __clk_init(struct device *dev, struct clk *clk) if (!clk) return -EINVAL; - mutex_lock(&prepare_lock); + clk_prepare_lock(); /* check to see if a clock with this name is already registered */ if (__clk_lookup(clk->name)) { @@ -1462,7 +1658,7 @@ int __clk_init(struct device *dev, struct clk *clk) clk_debug_register(clk); out: - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -1696,7 +1892,7 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb) if (!clk || !nb) return -EINVAL; - mutex_lock(&prepare_lock); + clk_prepare_lock(); /* search the list of notifiers for this clk */ list_for_each_entry(cn, &clk_notifier_list, node) @@ -1720,7 +1916,7 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb) clk->notifier_count++; out: - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } @@ -1745,7 +1941,7 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb) if (!clk || !nb) return -EINVAL; - mutex_lock(&prepare_lock); + clk_prepare_lock(); list_for_each_entry(cn, &clk_notifier_list, node) if (cn->clk == clk) @@ -1766,7 +1962,7 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb) ret = -ENOENT; } - mutex_unlock(&prepare_lock); + clk_prepare_unlock(); return ret; } diff --git a/drivers/clk/mvebu/clk-core.c b/drivers/clk/mvebu/clk-core.c index 69056a7479e..2628610c192 100644 --- a/drivers/clk/mvebu/clk-core.c +++ b/drivers/clk/mvebu/clk-core.c @@ -156,7 +156,7 @@ static u32 __init armada_370_get_cpu_freq(void __iomem *sar) cpu_freq_select = ((readl(sar) >> SARL_A370_PCLK_FREQ_OPT) & SARL_A370_PCLK_FREQ_OPT_MASK); - if (cpu_freq_select > ARRAY_SIZE(armada_370_cpu_frequencies)) { + if (cpu_freq_select >= ARRAY_SIZE(armada_370_cpu_frequencies)) { pr_err("CPU freq select unsuported %d\n", cpu_freq_select); cpu_freq = 0; } else @@ -278,7 +278,7 @@ static u32 __init armada_xp_get_cpu_freq(void __iomem *sar) cpu_freq_select |= (((readl(sar+4) >> SARH_AXP_PCLK_FREQ_OPT) & SARH_AXP_PCLK_FREQ_OPT_MASK) << SARH_AXP_PCLK_FREQ_OPT_SHIFT); - if (cpu_freq_select > ARRAY_SIZE(armada_xp_cpu_frequencies)) { + if (cpu_freq_select >= ARRAY_SIZE(armada_xp_cpu_frequencies)) { pr_err("CPU freq select unsuported: %d\n", cpu_freq_select); cpu_freq = 0; } else diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c index 9dd2551a0a4..b0fbc071549 100644 --- a/drivers/clk/mvebu/clk-cpu.c +++ b/drivers/clk/mvebu/clk-cpu.c @@ -16,7 +16,6 @@ #include <linux/io.h> #include <linux/of.h> #include <linux/delay.h> -#include "clk-cpu.h" #define SYS_CTRL_CLK_DIVIDER_CTRL_OFFSET 0x0 #define SYS_CTRL_CLK_DIVIDER_VALUE_OFFSET 0xC @@ -173,17 +172,5 @@ clks_out: kfree(cpuclk); } -static const __initconst struct of_device_id clk_cpu_match[] = { - { - .compatible = "marvell,armada-xp-cpu-clock", - .data = of_cpu_clk_setup, - }, - { - /* sentinel */ - }, -}; - -void __init mvebu_cpu_clk_init(void) -{ - of_clk_init(clk_cpu_match); -} +CLK_OF_DECLARE(armada_xp_cpu_clock, "marvell,armada-xp-cpu-clock", + of_cpu_clk_setup); diff --git a/drivers/clk/mvebu/clk-cpu.h b/drivers/clk/mvebu/clk-cpu.h deleted file mode 100644 index 08e2affba4e..00000000000 --- a/drivers/clk/mvebu/clk-cpu.h +++ /dev/null @@ -1,22 +0,0 @@ -/* - * Marvell MVEBU CPU clock handling. - * - * Copyright (C) 2012 Marvell - * - * Gregory CLEMENT <gregory.clement@free-electrons.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#ifndef __MVEBU_CLK_CPU_H -#define __MVEBU_CLK_CPU_H - -#ifdef CONFIG_MVEBU_CLK_CPU -void __init mvebu_cpu_clk_init(void); -#else -static inline void mvebu_cpu_clk_init(void) {} -#endif - -#endif diff --git a/drivers/clk/mvebu/clk.c b/drivers/clk/mvebu/clk.c index 855681b8a9d..29f10fb3006 100644 --- a/drivers/clk/mvebu/clk.c +++ b/drivers/clk/mvebu/clk.c @@ -10,18 +10,14 @@ * warranty of any kind, whether express or implied. */ #include <linux/kernel.h> -#include <linux/clk.h> #include <linux/clk-provider.h> -#include <linux/of_address.h> -#include <linux/clk/mvebu.h> #include <linux/of.h> #include "clk-core.h" -#include "clk-cpu.h" #include "clk-gating-ctrl.h" void __init mvebu_clocks_init(void) { mvebu_core_clk_init(); mvebu_gating_clk_init(); - mvebu_cpu_clk_init(); + of_clk_init(NULL); } diff --git a/drivers/clk/mxs/clk.c b/drivers/clk/mxs/clk.c index b24d56067c8..5301bce8957 100644 --- a/drivers/clk/mxs/clk.c +++ b/drivers/clk/mxs/clk.c @@ -13,6 +13,7 @@ #include <linux/io.h> #include <linux/jiffies.h> #include <linux/spinlock.h> +#include "clk.h" DEFINE_SPINLOCK(mxs_lock); diff --git a/drivers/clk/spear/spear1340_clock.c b/drivers/clk/spear/spear1340_clock.c index 82abea366b7..35e7e2698e1 100644 --- a/drivers/clk/spear/spear1340_clock.c +++ b/drivers/clk/spear/spear1340_clock.c @@ -960,47 +960,47 @@ void __init spear1340_clk_init(void) SPEAR1340_SPDIF_IN_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0100000.spdif-in"); - clk = clk_register_gate(NULL, "acp_clk", "acp_mclk", 0, + clk = clk_register_gate(NULL, "acp_clk", "ahb_clk", 0, SPEAR1340_PERIP2_CLK_ENB, SPEAR1340_ACP_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "acp_clk"); - clk = clk_register_gate(NULL, "plgpio_clk", "plgpio_mclk", 0, + clk = clk_register_gate(NULL, "plgpio_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_PLGPIO_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "e2800000.gpio"); - clk = clk_register_gate(NULL, "video_dec_clk", "video_dec_mclk", 0, + clk = clk_register_gate(NULL, "video_dec_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_VIDEO_DEC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "video_dec"); - clk = clk_register_gate(NULL, "video_enc_clk", "video_enc_mclk", 0, + clk = clk_register_gate(NULL, "video_enc_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_VIDEO_ENC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "video_enc"); - clk = clk_register_gate(NULL, "video_in_clk", "video_in_mclk", 0, + clk = clk_register_gate(NULL, "video_in_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_VIDEO_IN_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "spear_vip"); - clk = clk_register_gate(NULL, "cam0_clk", "cam0_mclk", 0, + clk = clk_register_gate(NULL, "cam0_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_CAM0_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0200000.cam0"); - clk = clk_register_gate(NULL, "cam1_clk", "cam1_mclk", 0, + clk = clk_register_gate(NULL, "cam1_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_CAM1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0300000.cam1"); - clk = clk_register_gate(NULL, "cam2_clk", "cam2_mclk", 0, + clk = clk_register_gate(NULL, "cam2_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_CAM2_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0400000.cam2"); - clk = clk_register_gate(NULL, "cam3_clk", "cam3_mclk", 0, + clk = clk_register_gate(NULL, "cam3_clk", "ahb_clk", 0, SPEAR1340_PERIP3_CLK_ENB, SPEAR1340_CAM3_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0500000.cam3"); diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile new file mode 100644 index 00000000000..b5bac917612 --- /dev/null +++ b/drivers/clk/sunxi/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for sunxi specific clk +# + +obj-y += clk-sunxi.o clk-factors.o diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c new file mode 100644 index 00000000000..88523f91d9b --- /dev/null +++ b/drivers/clk/sunxi/clk-factors.c @@ -0,0 +1,180 @@ +/* + * Copyright (C) 2013 Emilio López <emilio@elopez.com.ar> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Adjustable factor-based clock implementation + */ + +#include <linux/clk-provider.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/err.h> +#include <linux/string.h> + +#include <linux/delay.h> + +#include "clk-factors.h" + +/* + * DOC: basic adjustable factor-based clock that cannot gate + * + * Traits of this clock: + * prepare - clk_prepare only ensures that parents are prepared + * enable - clk_enable only ensures that parents are enabled + * rate - rate is adjustable. + * clk->rate = (parent->rate * N * (K + 1) >> P) / (M + 1) + * parent - fixed parent. No clk_set_parent support + */ + +struct clk_factors { + struct clk_hw hw; + void __iomem *reg; + struct clk_factors_config *config; + void (*get_factors) (u32 *rate, u32 parent, u8 *n, u8 *k, u8 *m, u8 *p); + spinlock_t *lock; +}; + +#define to_clk_factors(_hw) container_of(_hw, struct clk_factors, hw) + +#define SETMASK(len, pos) (((-1U) >> (31-len)) << (pos)) +#define CLRMASK(len, pos) (~(SETMASK(len, pos))) +#define FACTOR_GET(bit, len, reg) (((reg) & SETMASK(len, bit)) >> (bit)) + +#define FACTOR_SET(bit, len, reg, val) \ + (((reg) & CLRMASK(len, bit)) | (val << (bit))) + +static unsigned long clk_factors_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u8 n = 1, k = 0, p = 0, m = 0; + u32 reg; + unsigned long rate; + struct clk_factors *factors = to_clk_factors(hw); + struct clk_factors_config *config = factors->config; + + /* Fetch the register value */ + reg = readl(factors->reg); + + /* Get each individual factor if applicable */ + if (config->nwidth != SUNXI_FACTORS_NOT_APPLICABLE) + n = FACTOR_GET(config->nshift, config->nwidth, reg); + if (config->kwidth != SUNXI_FACTORS_NOT_APPLICABLE) + k = FACTOR_GET(config->kshift, config->kwidth, reg); + if (config->mwidth != SUNXI_FACTORS_NOT_APPLICABLE) + m = FACTOR_GET(config->mshift, config->mwidth, reg); + if (config->pwidth != SUNXI_FACTORS_NOT_APPLICABLE) + p = FACTOR_GET(config->pshift, config->pwidth, reg); + + /* Calculate the rate */ + rate = (parent_rate * n * (k + 1) >> p) / (m + 1); + + return rate; +} + +static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct clk_factors *factors = to_clk_factors(hw); + factors->get_factors((u32 *)&rate, (u32)*parent_rate, + NULL, NULL, NULL, NULL); + + return rate; +} + +static int clk_factors_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + u8 n, k, m, p; + u32 reg; + struct clk_factors *factors = to_clk_factors(hw); + struct clk_factors_config *config = factors->config; + unsigned long flags = 0; + + factors->get_factors((u32 *)&rate, (u32)parent_rate, &n, &k, &m, &p); + + if (factors->lock) + spin_lock_irqsave(factors->lock, flags); + + /* Fetch the register value */ + reg = readl(factors->reg); + + /* Set up the new factors - macros do not do anything if width is 0 */ + reg = FACTOR_SET(config->nshift, config->nwidth, reg, n); + reg = FACTOR_SET(config->kshift, config->kwidth, reg, k); + reg = FACTOR_SET(config->mshift, config->mwidth, reg, m); + reg = FACTOR_SET(config->pshift, config->pwidth, reg, p); + + /* Apply them now */ + writel(reg, factors->reg); + + /* delay 500us so pll stabilizes */ + __delay((rate >> 20) * 500 / 2); + + if (factors->lock) + spin_unlock_irqrestore(factors->lock, flags); + + return 0; +} + +static const struct clk_ops clk_factors_ops = { + .recalc_rate = clk_factors_recalc_rate, + .round_rate = clk_factors_round_rate, + .set_rate = clk_factors_set_rate, +}; + +/** + * clk_register_factors - register a factors clock with + * the clock framework + * @dev: device registering this clock + * @name: name of this clock + * @parent_name: name of clock's parent + * @flags: framework-specific flags + * @reg: register address to adjust factors + * @config: shift and width of factors n, k, m and p + * @get_factors: function to calculate the factors for a given frequency + * @lock: shared register lock for this clock + */ +struct clk *clk_register_factors(struct device *dev, const char *name, + const char *parent_name, + unsigned long flags, void __iomem *reg, + struct clk_factors_config *config, + void (*get_factors)(u32 *rate, u32 parent, + u8 *n, u8 *k, u8 *m, u8 *p), + spinlock_t *lock) +{ + struct clk_factors *factors; + struct clk *clk; + struct clk_init_data init; + + /* allocate the factors */ + factors = kzalloc(sizeof(struct clk_factors), GFP_KERNEL); + if (!factors) { + pr_err("%s: could not allocate factors clk\n", __func__); + return ERR_PTR(-ENOMEM); + } + + init.name = name; + init.ops = &clk_factors_ops; + init.flags = flags; + init.parent_names = (parent_name ? &parent_name : NULL); + init.num_parents = (parent_name ? 1 : 0); + + /* struct clk_factors assignments */ + factors->reg = reg; + factors->config = config; + factors->lock = lock; + factors->hw.init = &init; + factors->get_factors = get_factors; + + /* register the clock */ + clk = clk_register(dev, &factors->hw); + + if (IS_ERR(clk)) + kfree(factors); + + return clk; +} diff --git a/drivers/clk/sunxi/clk-factors.h b/drivers/clk/sunxi/clk-factors.h new file mode 100644 index 00000000000..f49851cc438 --- /dev/null +++ b/drivers/clk/sunxi/clk-factors.h @@ -0,0 +1,27 @@ +#ifndef __MACH_SUNXI_CLK_FACTORS_H +#define __MACH_SUNXI_CLK_FACTORS_H + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> + +#define SUNXI_FACTORS_NOT_APPLICABLE (0) + +struct clk_factors_config { + u8 nshift; + u8 nwidth; + u8 kshift; + u8 kwidth; + u8 mshift; + u8 mwidth; + u8 pshift; + u8 pwidth; +}; + +struct clk *clk_register_factors(struct device *dev, const char *name, + const char *parent_name, + unsigned long flags, void __iomem *reg, + struct clk_factors_config *config, + void (*get_factors) (u32 *rate, u32 parent_rate, + u8 *n, u8 *k, u8 *m, u8 *p), + spinlock_t *lock); +#endif diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c new file mode 100644 index 00000000000..8492ad1d536 --- /dev/null +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -0,0 +1,469 @@ +/* + * Copyright 2013 Emilio López + * + * Emilio López <emilio@elopez.com.ar> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/sunxi.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include "clk-factors.h" + +static DEFINE_SPINLOCK(clk_lock); + +/** + * sunxi_osc_clk_setup() - Setup function for gatable oscillator + */ + +#define SUNXI_OSC24M_GATE 0 + +static void __init sunxi_osc_clk_setup(struct device_node *node) +{ + struct clk *clk; + struct clk_fixed_rate *fixed; + struct clk_gate *gate; + const char *clk_name = node->name; + u32 rate; + + /* allocate fixed-rate and gate clock structs */ + fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL); + if (!fixed) + return; + gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); + if (!gate) { + kfree(fixed); + return; + } + + if (of_property_read_u32(node, "clock-frequency", &rate)) + return; + + /* set up gate and fixed rate properties */ + gate->reg = of_iomap(node, 0); + gate->bit_idx = SUNXI_OSC24M_GATE; + gate->lock = &clk_lock; + fixed->fixed_rate = rate; + + clk = clk_register_composite(NULL, clk_name, + NULL, 0, + NULL, NULL, + &fixed->hw, &clk_fixed_rate_ops, + &gate->hw, &clk_gate_ops, + CLK_IS_ROOT); + + if (clk) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + clk_register_clkdev(clk, clk_name, NULL); + } +} + + + +/** + * sunxi_get_pll1_factors() - calculates n, k, m, p factors for PLL1 + * PLL1 rate is calculated as follows + * rate = (parent_rate * n * (k + 1) >> p) / (m + 1); + * parent_rate is always 24Mhz + */ + +static void sunxi_get_pll1_factors(u32 *freq, u32 parent_rate, + u8 *n, u8 *k, u8 *m, u8 *p) +{ + u8 div; + + /* Normalize value to a 6M multiple */ + div = *freq / 6000000; + *freq = 6000000 * div; + + /* we were called to round the frequency, we can now return */ + if (n == NULL) + return; + + /* m is always zero for pll1 */ + *m = 0; + + /* k is 1 only on these cases */ + if (*freq >= 768000000 || *freq == 42000000 || *freq == 54000000) + *k = 1; + else + *k = 0; + + /* p will be 3 for divs under 10 */ + if (div < 10) + *p = 3; + + /* p will be 2 for divs between 10 - 20 and odd divs under 32 */ + else if (div < 20 || (div < 32 && (div & 1))) + *p = 2; + + /* p will be 1 for even divs under 32, divs under 40 and odd pairs + * of divs between 40-62 */ + else if (div < 40 || (div < 64 && (div & 2))) + *p = 1; + + /* any other entries have p = 0 */ + else + *p = 0; + + /* calculate a suitable n based on k and p */ + div <<= *p; + div /= (*k + 1); + *n = div / 4; +} + + + +/** + * sunxi_get_apb1_factors() - calculates m, p factors for APB1 + * APB1 rate is calculated as follows + * rate = (parent_rate >> p) / (m + 1); + */ + +static void sunxi_get_apb1_factors(u32 *freq, u32 parent_rate, + u8 *n, u8 *k, u8 *m, u8 *p) +{ + u8 calcm, calcp; + + if (parent_rate < *freq) + *freq = parent_rate; + + parent_rate = (parent_rate + (*freq - 1)) / *freq; + + /* Invalid rate! */ + if (parent_rate > 32) + return; + + if (parent_rate <= 4) + calcp = 0; + else if (parent_rate <= 8) + calcp = 1; + else if (parent_rate <= 16) + calcp = 2; + else + calcp = 3; + + calcm = (parent_rate >> calcp) - 1; + + *freq = (parent_rate >> calcp) / (calcm + 1); + + /* we were called to round the frequency, we can now return */ + if (n == NULL) + return; + + *m = calcm; + *p = calcp; +} + + + +/** + * sunxi_factors_clk_setup() - Setup function for factor clocks + */ + +struct factors_data { + struct clk_factors_config *table; + void (*getter) (u32 *rate, u32 parent_rate, u8 *n, u8 *k, u8 *m, u8 *p); +}; + +static struct clk_factors_config pll1_config = { + .nshift = 8, + .nwidth = 5, + .kshift = 4, + .kwidth = 2, + .mshift = 0, + .mwidth = 2, + .pshift = 16, + .pwidth = 2, +}; + +static struct clk_factors_config apb1_config = { + .mshift = 0, + .mwidth = 5, + .pshift = 16, + .pwidth = 2, +}; + +static const __initconst struct factors_data pll1_data = { + .table = &pll1_config, + .getter = sunxi_get_pll1_factors, +}; + +static const __initconst struct factors_data apb1_data = { + .table = &apb1_config, + .getter = sunxi_get_apb1_factors, +}; + +static void __init sunxi_factors_clk_setup(struct device_node *node, + struct factors_data *data) +{ + struct clk *clk; + const char *clk_name = node->name; + const char *parent; + void *reg; + + reg = of_iomap(node, 0); + + parent = of_clk_get_parent_name(node, 0); + + clk = clk_register_factors(NULL, clk_name, parent, 0, reg, + data->table, data->getter, &clk_lock); + + if (clk) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + clk_register_clkdev(clk, clk_name, NULL); + } +} + + + +/** + * sunxi_mux_clk_setup() - Setup function for muxes + */ + +#define SUNXI_MUX_GATE_WIDTH 2 + +struct mux_data { + u8 shift; +}; + +static const __initconst struct mux_data cpu_data = { + .shift = 16, +}; + +static const __initconst struct mux_data apb1_mux_data = { + .shift = 24, +}; + +static void __init sunxi_mux_clk_setup(struct device_node *node, + struct mux_data *data) +{ + struct clk *clk; + const char *clk_name = node->name; + const char *parents[5]; + void *reg; + int i = 0; + + reg = of_iomap(node, 0); + + while (i < 5 && (parents[i] = of_clk_get_parent_name(node, i)) != NULL) + i++; + + clk = clk_register_mux(NULL, clk_name, parents, i, 0, reg, + data->shift, SUNXI_MUX_GATE_WIDTH, + 0, &clk_lock); + + if (clk) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + clk_register_clkdev(clk, clk_name, NULL); + } +} + + + +/** + * sunxi_divider_clk_setup() - Setup function for simple divider clocks + */ + +#define SUNXI_DIVISOR_WIDTH 2 + +struct div_data { + u8 shift; + u8 pow; +}; + +static const __initconst struct div_data axi_data = { + .shift = 0, + .pow = 0, +}; + +static const __initconst struct div_data ahb_data = { + .shift = 4, + .pow = 1, +}; + +static const __initconst struct div_data apb0_data = { + .shift = 8, + .pow = 1, +}; + +static void __init sunxi_divider_clk_setup(struct device_node *node, + struct div_data *data) +{ + struct clk *clk; + const char *clk_name = node->name; + const char *clk_parent; + void *reg; + + reg = of_iomap(node, 0); + + clk_parent = of_clk_get_parent_name(node, 0); + + clk = clk_register_divider(NULL, clk_name, clk_parent, 0, + reg, data->shift, SUNXI_DIVISOR_WIDTH, + data->pow ? CLK_DIVIDER_POWER_OF_TWO : 0, + &clk_lock); + if (clk) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + clk_register_clkdev(clk, clk_name, NULL); + } +} + + + +/** + * sunxi_gates_clk_setup() - Setup function for leaf gates on clocks + */ + +#define SUNXI_GATES_MAX_SIZE 64 + +struct gates_data { + DECLARE_BITMAP(mask, SUNXI_GATES_MAX_SIZE); +}; + +static const __initconst struct gates_data axi_gates_data = { + .mask = {1}, +}; + +static const __initconst struct gates_data ahb_gates_data = { + .mask = {0x7F77FFF, 0x14FB3F}, +}; + +static const __initconst struct gates_data apb0_gates_data = { + .mask = {0x4EF}, +}; + +static const __initconst struct gates_data apb1_gates_data = { + .mask = {0xFF00F7}, +}; + +static void __init sunxi_gates_clk_setup(struct device_node *node, + struct gates_data *data) +{ + struct clk_onecell_data *clk_data; + const char *clk_parent; + const char *clk_name; + void *reg; + int qty; + int i = 0; + int j = 0; + int ignore; + + reg = of_iomap(node, 0); + + clk_parent = of_clk_get_parent_name(node, 0); + + /* Worst-case size approximation and memory allocation */ + qty = find_last_bit(data->mask, SUNXI_GATES_MAX_SIZE); + clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); + if (!clk_data) + return; + clk_data->clks = kzalloc((qty+1) * sizeof(struct clk *), GFP_KERNEL); + if (!clk_data->clks) { + kfree(clk_data); + return; + } + + for_each_set_bit(i, data->mask, SUNXI_GATES_MAX_SIZE) { + of_property_read_string_index(node, "clock-output-names", + j, &clk_name); + + /* No driver claims this clock, but it should remain gated */ + ignore = !strcmp("ahb_sdram", clk_name) ? CLK_IGNORE_UNUSED : 0; + + clk_data->clks[i] = clk_register_gate(NULL, clk_name, + clk_parent, ignore, + reg + 4 * (i/32), i % 32, + 0, &clk_lock); + WARN_ON(IS_ERR(clk_data->clks[i])); + + j++; + } + + /* Adjust to the real max */ + clk_data->clk_num = i; + + of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); +} + +/* Matches for of_clk_init */ +static const __initconst struct of_device_id clk_match[] = { + {.compatible = "allwinner,sun4i-osc-clk", .data = sunxi_osc_clk_setup,}, + {} +}; + +/* Matches for factors clocks */ +static const __initconst struct of_device_id clk_factors_match[] = { + {.compatible = "allwinner,sun4i-pll1-clk", .data = &pll1_data,}, + {.compatible = "allwinner,sun4i-apb1-clk", .data = &apb1_data,}, + {} +}; + +/* Matches for divider clocks */ +static const __initconst struct of_device_id clk_div_match[] = { + {.compatible = "allwinner,sun4i-axi-clk", .data = &axi_data,}, + {.compatible = "allwinner,sun4i-ahb-clk", .data = &ahb_data,}, + {.compatible = "allwinner,sun4i-apb0-clk", .data = &apb0_data,}, + {} +}; + +/* Matches for mux clocks */ +static const __initconst struct of_device_id clk_mux_match[] = { + {.compatible = "allwinner,sun4i-cpu-clk", .data = &cpu_data,}, + {.compatible = "allwinner,sun4i-apb1-mux-clk", .data = &apb1_mux_data,}, + {} +}; + +/* Matches for gate clocks */ +static const __initconst struct of_device_id clk_gates_match[] = { + {.compatible = "allwinner,sun4i-axi-gates-clk", .data = &axi_gates_data,}, + {.compatible = "allwinner,sun4i-ahb-gates-clk", .data = &ahb_gates_data,}, + {.compatible = "allwinner,sun4i-apb0-gates-clk", .data = &apb0_gates_data,}, + {.compatible = "allwinner,sun4i-apb1-gates-clk", .data = &apb1_gates_data,}, + {} +}; + +static void __init of_sunxi_table_clock_setup(const struct of_device_id *clk_match, + void *function) +{ + struct device_node *np; + const struct div_data *data; + const struct of_device_id *match; + void (*setup_function)(struct device_node *, const void *) = function; + + for_each_matching_node(np, clk_match) { + match = of_match_node(clk_match, np); + data = match->data; + setup_function(np, data); + } +} + +void __init sunxi_init_clocks(void) +{ + /* Register all the simple sunxi clocks on DT */ + of_clk_init(clk_match); + + /* Register factor clocks */ + of_sunxi_table_clock_setup(clk_factors_match, sunxi_factors_clk_setup); + + /* Register divider clocks */ + of_sunxi_table_clock_setup(clk_div_match, sunxi_divider_clk_setup); + + /* Register mux clocks */ + of_sunxi_table_clock_setup(clk_mux_match, sunxi_mux_clk_setup); + + /* Register gate clocks */ + of_sunxi_table_clock_setup(clk_gates_match, sunxi_gates_clk_setup); +} diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h index 0744731c622..a09d7dcaf18 100644 --- a/drivers/clk/tegra/clk.h +++ b/drivers/clk/tegra/clk.h @@ -355,15 +355,16 @@ struct clk *tegra_clk_register_periph_nodiv(const char *name, struct tegra_clk_periph *periph, void __iomem *clk_base, u32 offset); -#define TEGRA_CLK_PERIPH(_mux_shift, _mux_width, _mux_flags, \ +#define TEGRA_CLK_PERIPH(_mux_shift, _mux_mask, _mux_flags, \ _div_shift, _div_width, _div_frac_width, \ _div_flags, _clk_num, _enb_refcnt, _regs, \ - _gate_flags) \ + _gate_flags, _table) \ { \ .mux = { \ .flags = _mux_flags, \ .shift = _mux_shift, \ - .width = _mux_width, \ + .mask = _mux_mask, \ + .table = _table, \ }, \ .divider = { \ .flags = _div_flags, \ @@ -393,26 +394,36 @@ struct tegra_periph_init_data { const char *dev_id; }; -#define TEGRA_INIT_DATA(_name, _con_id, _dev_id, _parent_names, _offset, \ - _mux_shift, _mux_width, _mux_flags, _div_shift, \ +#define TEGRA_INIT_DATA_TABLE(_name, _con_id, _dev_id, _parent_names, _offset,\ + _mux_shift, _mux_mask, _mux_flags, _div_shift, \ _div_width, _div_frac_width, _div_flags, _regs, \ - _clk_num, _enb_refcnt, _gate_flags, _clk_id) \ + _clk_num, _enb_refcnt, _gate_flags, _clk_id, _table) \ { \ .name = _name, \ .clk_id = _clk_id, \ .parent_names = _parent_names, \ .num_parents = ARRAY_SIZE(_parent_names), \ - .periph = TEGRA_CLK_PERIPH(_mux_shift, _mux_width, \ + .periph = TEGRA_CLK_PERIPH(_mux_shift, _mux_mask, \ _mux_flags, _div_shift, \ _div_width, _div_frac_width, \ _div_flags, _clk_num, \ _enb_refcnt, _regs, \ - _gate_flags), \ + _gate_flags, _table), \ .offset = _offset, \ .con_id = _con_id, \ .dev_id = _dev_id, \ } +#define TEGRA_INIT_DATA(_name, _con_id, _dev_id, _parent_names, _offset,\ + _mux_shift, _mux_width, _mux_flags, _div_shift, \ + _div_width, _div_frac_width, _div_flags, _regs, \ + _clk_num, _enb_refcnt, _gate_flags, _clk_id) \ + TEGRA_INIT_DATA_TABLE(_name, _con_id, _dev_id, _parent_names, _offset,\ + _mux_shift, BIT(_mux_width) - 1, _mux_flags, \ + _div_shift, _div_width, _div_frac_width, _div_flags, \ + _regs, _clk_num, _enb_refcnt, _gate_flags, _clk_id,\ + NULL) + /** * struct clk_super_mux - super clock * diff --git a/drivers/clk/ux500/Makefile b/drivers/clk/ux500/Makefile index bcc0c11a507..c6a806ed0e8 100644 --- a/drivers/clk/ux500/Makefile +++ b/drivers/clk/ux500/Makefile @@ -5,6 +5,7 @@ # Clock types obj-y += clk-prcc.o obj-y += clk-prcmu.o +obj-y += clk-sysctrl.o # Clock definitions obj-y += u8500_clk.o diff --git a/drivers/clk/ux500/abx500-clk.c b/drivers/clk/ux500/abx500-clk.c index 9f7400d74fa..a0fca004abc 100644 --- a/drivers/clk/ux500/abx500-clk.c +++ b/drivers/clk/ux500/abx500-clk.c @@ -12,13 +12,78 @@ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/mfd/abx500/ab8500.h> - -/* TODO: Add clock implementations here */ - +#include <linux/mfd/abx500/ab8500-sysctrl.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/clk-provider.h> +#include <linux/mfd/dbx500-prcmu.h> +#include "clk.h" /* Clock definitions for ab8500 */ static int ab8500_reg_clks(struct device *dev) { + int ret; + struct clk *clk; + + const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"}; + u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1}; + u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK}; + u8 intclk_reg_bits[] = { + 0 , + (1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT) + }; + + dev_info(dev, "register clocks for ab850x\n"); + + /* Enable SWAT */ + ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE); + if (ret) + return ret; + + /* ab8500_sysclk */ + clk = clk_reg_prcmu_gate("ab8500_sysclk", NULL, PRCMU_SYSCLK, + CLK_IS_ROOT); + clk_register_clkdev(clk, "sysclk", "ab8500-usb.0"); + clk_register_clkdev(clk, "sysclk", "ab-iddet.0"); + clk_register_clkdev(clk, "sysclk", "ab85xx-codec.0"); + clk_register_clkdev(clk, "sysclk", "shrm_bus"); + + /* ab8500_sysclk2 */ + clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk", + AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, + AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0); + clk_register_clkdev(clk, "sysclk", "0-0070"); + + /* ab8500_sysclk3 */ + clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk", + AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, + AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0); + clk_register_clkdev(clk, "sysclk", "cg1960_core.0"); + + /* ab8500_sysclk4 */ + clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk", + AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, + AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0); + + /* ab_ulpclk */ + clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL, + AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ, + AB8500_SYSULPCLKCTRL1_ULPCLKREQ, + 38400000, 9000, CLK_IS_ROOT); + clk_register_clkdev(clk, "ulpclk", "ab85xx-codec.0"); + + /* ab8500_intclk */ + clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2, + intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0); + clk_register_clkdev(clk, "intclk", "ab85xx-codec.0"); + clk_register_clkdev(clk, NULL, "ab8500-pwm.1"); + + /* ab8500_audioclk */ + clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk", + AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, + AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0); + clk_register_clkdev(clk, "audioclk", "ab85xx-codec.0"); + return 0; } diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c index 74faa7e3cf5..293a2885441 100644 --- a/drivers/clk/ux500/clk-prcmu.c +++ b/drivers/clk/ux500/clk-prcmu.c @@ -20,15 +20,23 @@ struct clk_prcmu { struct clk_hw hw; u8 cg_sel; + int is_prepared; int is_enabled; + int opp_requested; }; /* PRCMU clock operations. */ static int clk_prcmu_prepare(struct clk_hw *hw) { + int ret; struct clk_prcmu *clk = to_clk_prcmu(hw); - return prcmu_request_clock(clk->cg_sel, true); + + ret = prcmu_request_clock(clk->cg_sel, true); + if (!ret) + clk->is_prepared = 1; + + return ret;; } static void clk_prcmu_unprepare(struct clk_hw *hw) @@ -36,7 +44,15 @@ static void clk_prcmu_unprepare(struct clk_hw *hw) struct clk_prcmu *clk = to_clk_prcmu(hw); if (prcmu_request_clock(clk->cg_sel, false)) pr_err("clk_prcmu: %s failed to disable %s.\n", __func__, - hw->init->name); + __clk_get_name(hw->clk)); + else + clk->is_prepared = 0; +} + +static int clk_prcmu_is_prepared(struct clk_hw *hw) +{ + struct clk_prcmu *clk = to_clk_prcmu(hw); + return clk->is_prepared; } static int clk_prcmu_enable(struct clk_hw *hw) @@ -79,58 +95,52 @@ static int clk_prcmu_set_rate(struct clk_hw *hw, unsigned long rate, return prcmu_set_clock_rate(clk->cg_sel, rate); } -static int request_ape_opp100(bool enable) -{ - static int reqs; - int err = 0; - - if (enable) { - if (!reqs) - err = prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP, - "clock", 100); - if (!err) - reqs++; - } else { - reqs--; - if (!reqs) - prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP, - "clock"); - } - return err; -} - static int clk_prcmu_opp_prepare(struct clk_hw *hw) { int err; struct clk_prcmu *clk = to_clk_prcmu(hw); - err = request_ape_opp100(true); - if (err) { - pr_err("clk_prcmu: %s failed to request APE OPP100 for %s.\n", - __func__, hw->init->name); - return err; + if (!clk->opp_requested) { + err = prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP, + (char *)__clk_get_name(hw->clk), + 100); + if (err) { + pr_err("clk_prcmu: %s fail req APE OPP for %s.\n", + __func__, __clk_get_name(hw->clk)); + return err; + } + clk->opp_requested = 1; } err = prcmu_request_clock(clk->cg_sel, true); - if (err) - request_ape_opp100(false); + if (err) { + prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP, + (char *)__clk_get_name(hw->clk)); + clk->opp_requested = 0; + return err; + } - return err; + clk->is_prepared = 1; + return 0; } static void clk_prcmu_opp_unprepare(struct clk_hw *hw) { struct clk_prcmu *clk = to_clk_prcmu(hw); - if (prcmu_request_clock(clk->cg_sel, false)) - goto out_error; - if (request_ape_opp100(false)) - goto out_error; - return; - -out_error: - pr_err("clk_prcmu: %s failed to disable %s.\n", __func__, - hw->init->name); + if (prcmu_request_clock(clk->cg_sel, false)) { + pr_err("clk_prcmu: %s failed to disable %s.\n", __func__, + __clk_get_name(hw->clk)); + return; + } + + if (clk->opp_requested) { + prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP, + (char *)__clk_get_name(hw->clk)); + clk->opp_requested = 0; + } + + clk->is_prepared = 0; } static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw) @@ -138,38 +148,49 @@ static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw) int err; struct clk_prcmu *clk = to_clk_prcmu(hw); - err = prcmu_request_ape_opp_100_voltage(true); - if (err) { - pr_err("clk_prcmu: %s failed to request APE OPP VOLT for %s.\n", - __func__, hw->init->name); - return err; + if (!clk->opp_requested) { + err = prcmu_request_ape_opp_100_voltage(true); + if (err) { + pr_err("clk_prcmu: %s fail req APE OPP VOLT for %s.\n", + __func__, __clk_get_name(hw->clk)); + return err; + } + clk->opp_requested = 1; } err = prcmu_request_clock(clk->cg_sel, true); - if (err) + if (err) { prcmu_request_ape_opp_100_voltage(false); + clk->opp_requested = 0; + return err; + } - return err; + clk->is_prepared = 1; + return 0; } static void clk_prcmu_opp_volt_unprepare(struct clk_hw *hw) { struct clk_prcmu *clk = to_clk_prcmu(hw); - if (prcmu_request_clock(clk->cg_sel, false)) - goto out_error; - if (prcmu_request_ape_opp_100_voltage(false)) - goto out_error; - return; - -out_error: - pr_err("clk_prcmu: %s failed to disable %s.\n", __func__, - hw->init->name); + if (prcmu_request_clock(clk->cg_sel, false)) { + pr_err("clk_prcmu: %s failed to disable %s.\n", __func__, + __clk_get_name(hw->clk)); + return; + } + + if (clk->opp_requested) { + prcmu_request_ape_opp_100_voltage(false); + clk->opp_requested = 0; + } + + clk->is_prepared = 0; } static struct clk_ops clk_prcmu_scalable_ops = { .prepare = clk_prcmu_prepare, .unprepare = clk_prcmu_unprepare, + .is_prepared = clk_prcmu_is_prepared, .enable = clk_prcmu_enable, .disable = clk_prcmu_disable, .is_enabled = clk_prcmu_is_enabled, @@ -181,6 +202,7 @@ static struct clk_ops clk_prcmu_scalable_ops = { static struct clk_ops clk_prcmu_gate_ops = { .prepare = clk_prcmu_prepare, .unprepare = clk_prcmu_unprepare, + .is_prepared = clk_prcmu_is_prepared, .enable = clk_prcmu_enable, .disable = clk_prcmu_disable, .is_enabled = clk_prcmu_is_enabled, @@ -202,6 +224,7 @@ static struct clk_ops clk_prcmu_rate_ops = { static struct clk_ops clk_prcmu_opp_gate_ops = { .prepare = clk_prcmu_opp_prepare, .unprepare = clk_prcmu_opp_unprepare, + .is_prepared = clk_prcmu_is_prepared, .enable = clk_prcmu_enable, .disable = clk_prcmu_disable, .is_enabled = clk_prcmu_is_enabled, @@ -211,6 +234,7 @@ static struct clk_ops clk_prcmu_opp_gate_ops = { static struct clk_ops clk_prcmu_opp_volt_scalable_ops = { .prepare = clk_prcmu_opp_volt_prepare, .unprepare = clk_prcmu_opp_volt_unprepare, + .is_prepared = clk_prcmu_is_prepared, .enable = clk_prcmu_enable, .disable = clk_prcmu_disable, .is_enabled = clk_prcmu_is_enabled, @@ -242,7 +266,9 @@ static struct clk *clk_reg_prcmu(const char *name, } clk->cg_sel = cg_sel; + clk->is_prepared = 1; clk->is_enabled = 1; + clk->opp_requested = 0; /* "rate" can be used for changing the initial frequency */ if (rate) prcmu_set_clock_rate(cg_sel, rate); diff --git a/drivers/clk/ux500/clk-sysctrl.c b/drivers/clk/ux500/clk-sysctrl.c new file mode 100644 index 00000000000..bc7e9bde792 --- /dev/null +++ b/drivers/clk/ux500/clk-sysctrl.c @@ -0,0 +1,221 @@ +/* + * Sysctrl clock implementation for ux500 platform. + * + * Copyright (C) 2013 ST-Ericsson SA + * Author: Ulf Hansson <ulf.hansson@linaro.org> + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include <linux/clk-provider.h> +#include <linux/mfd/abx500/ab8500-sysctrl.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/err.h> +#include "clk.h" + +#define SYSCTRL_MAX_NUM_PARENTS 4 + +#define to_clk_sysctrl(_hw) container_of(_hw, struct clk_sysctrl, hw) + +struct clk_sysctrl { + struct clk_hw hw; + struct device *dev; + u8 parent_index; + u16 reg_sel[SYSCTRL_MAX_NUM_PARENTS]; + u8 reg_mask[SYSCTRL_MAX_NUM_PARENTS]; + u8 reg_bits[SYSCTRL_MAX_NUM_PARENTS]; + unsigned long rate; + unsigned long enable_delay_us; +}; + +/* Sysctrl clock operations. */ + +static int clk_sysctrl_prepare(struct clk_hw *hw) +{ + int ret; + struct clk_sysctrl *clk = to_clk_sysctrl(hw); + + ret = ab8500_sysctrl_write(clk->reg_sel[0], clk->reg_mask[0], + clk->reg_bits[0]); + + if (!ret && clk->enable_delay_us) + usleep_range(clk->enable_delay_us, clk->enable_delay_us); + + return ret; +} + +static void clk_sysctrl_unprepare(struct clk_hw *hw) +{ + struct clk_sysctrl *clk = to_clk_sysctrl(hw); + if (ab8500_sysctrl_clear(clk->reg_sel[0], clk->reg_mask[0])) + dev_err(clk->dev, "clk_sysctrl: %s fail to clear %s.\n", + __func__, __clk_get_name(hw->clk)); +} + +static unsigned long clk_sysctrl_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_sysctrl *clk = to_clk_sysctrl(hw); + return clk->rate; +} + +static int clk_sysctrl_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_sysctrl *clk = to_clk_sysctrl(hw); + u8 old_index = clk->parent_index; + int ret = 0; + + if (clk->reg_sel[old_index]) { + ret = ab8500_sysctrl_clear(clk->reg_sel[old_index], + clk->reg_mask[old_index]); + if (ret) + return ret; + } + + if (clk->reg_sel[index]) { + ret = ab8500_sysctrl_write(clk->reg_sel[index], + clk->reg_mask[index], + clk->reg_bits[index]); + if (ret) { + if (clk->reg_sel[old_index]) + ab8500_sysctrl_write(clk->reg_sel[old_index], + clk->reg_mask[old_index], + clk->reg_bits[old_index]); + return ret; + } + } + clk->parent_index = index; + + return ret; +} + +static u8 clk_sysctrl_get_parent(struct clk_hw *hw) +{ + struct clk_sysctrl *clk = to_clk_sysctrl(hw); + return clk->parent_index; +} + +static struct clk_ops clk_sysctrl_gate_ops = { + .prepare = clk_sysctrl_prepare, + .unprepare = clk_sysctrl_unprepare, +}; + +static struct clk_ops clk_sysctrl_gate_fixed_rate_ops = { + .prepare = clk_sysctrl_prepare, + .unprepare = clk_sysctrl_unprepare, + .recalc_rate = clk_sysctrl_recalc_rate, +}; + +static struct clk_ops clk_sysctrl_set_parent_ops = { + .set_parent = clk_sysctrl_set_parent, + .get_parent = clk_sysctrl_get_parent, +}; + +static struct clk *clk_reg_sysctrl(struct device *dev, + const char *name, + const char **parent_names, + u8 num_parents, + u16 *reg_sel, + u8 *reg_mask, + u8 *reg_bits, + unsigned long rate, + unsigned long enable_delay_us, + unsigned long flags, + struct clk_ops *clk_sysctrl_ops) +{ + struct clk_sysctrl *clk; + struct clk_init_data clk_sysctrl_init; + struct clk *clk_reg; + int i; + + if (!dev) + return ERR_PTR(-EINVAL); + + if (!name || (num_parents > SYSCTRL_MAX_NUM_PARENTS)) { + dev_err(dev, "clk_sysctrl: invalid arguments passed\n"); + return ERR_PTR(-EINVAL); + } + + clk = devm_kzalloc(dev, sizeof(struct clk_sysctrl), GFP_KERNEL); + if (!clk) { + dev_err(dev, "clk_sysctrl: could not allocate clk\n"); + return ERR_PTR(-ENOMEM); + } + + for (i = 0; i < num_parents; i++) { + clk->reg_sel[i] = reg_sel[i]; + clk->reg_bits[i] = reg_bits[i]; + clk->reg_mask[i] = reg_mask[i]; + } + + clk->parent_index = 0; + clk->rate = rate; + clk->enable_delay_us = enable_delay_us; + clk->dev = dev; + + clk_sysctrl_init.name = name; + clk_sysctrl_init.ops = clk_sysctrl_ops; + clk_sysctrl_init.flags = flags; + clk_sysctrl_init.parent_names = parent_names; + clk_sysctrl_init.num_parents = num_parents; + clk->hw.init = &clk_sysctrl_init; + + clk_reg = devm_clk_register(clk->dev, &clk->hw); + if (IS_ERR(clk_reg)) + dev_err(dev, "clk_sysctrl: clk_register failed\n"); + + return clk_reg; +} + +struct clk *clk_reg_sysctrl_gate(struct device *dev, + const char *name, + const char *parent_name, + u16 reg_sel, + u8 reg_mask, + u8 reg_bits, + unsigned long enable_delay_us, + unsigned long flags) +{ + const char **parent_names = (parent_name ? &parent_name : NULL); + u8 num_parents = (parent_name ? 1 : 0); + + return clk_reg_sysctrl(dev, name, parent_names, num_parents, + ®_sel, ®_mask, ®_bits, 0, enable_delay_us, + flags, &clk_sysctrl_gate_ops); +} + +struct clk *clk_reg_sysctrl_gate_fixed_rate(struct device *dev, + const char *name, + const char *parent_name, + u16 reg_sel, + u8 reg_mask, + u8 reg_bits, + unsigned long rate, + unsigned long enable_delay_us, + unsigned long flags) +{ + const char **parent_names = (parent_name ? &parent_name : NULL); + u8 num_parents = (parent_name ? 1 : 0); + + return clk_reg_sysctrl(dev, name, parent_names, num_parents, + ®_sel, ®_mask, ®_bits, + rate, enable_delay_us, flags, + &clk_sysctrl_gate_fixed_rate_ops); +} + +struct clk *clk_reg_sysctrl_set_parent(struct device *dev, + const char *name, + const char **parent_names, + u8 num_parents, + u16 *reg_sel, + u8 *reg_mask, + u8 *reg_bits, + unsigned long flags) +{ + return clk_reg_sysctrl(dev, name, parent_names, num_parents, + reg_sel, reg_mask, reg_bits, 0, 0, flags, + &clk_sysctrl_set_parent_ops); +} diff --git a/drivers/clk/ux500/clk.h b/drivers/clk/ux500/clk.h index c3e449169a8..a2bb92d85ee 100644 --- a/drivers/clk/ux500/clk.h +++ b/drivers/clk/ux500/clk.h @@ -11,16 +11,18 @@ #define __UX500_CLK_H #include <linux/clk.h> +#include <linux/device.h> +#include <linux/types.h> struct clk *clk_reg_prcc_pclk(const char *name, const char *parent_name, - unsigned int phy_base, + resource_size_t phy_base, u32 cg_sel, unsigned long flags); struct clk *clk_reg_prcc_kclk(const char *name, const char *parent_name, - unsigned int phy_base, + resource_size_t phy_base, u32 cg_sel, unsigned long flags); @@ -57,4 +59,32 @@ struct clk *clk_reg_prcmu_opp_volt_scalable(const char *name, unsigned long rate, unsigned long flags); +struct clk *clk_reg_sysctrl_gate(struct device *dev, + const char *name, + const char *parent_name, + u16 reg_sel, + u8 reg_mask, + u8 reg_bits, + unsigned long enable_delay_us, + unsigned long flags); + +struct clk *clk_reg_sysctrl_gate_fixed_rate(struct device *dev, + const char *name, + const char *parent_name, + u16 reg_sel, + u8 reg_mask, + u8 reg_bits, + unsigned long rate, + unsigned long enable_delay_us, + unsigned long flags); + +struct clk *clk_reg_sysctrl_set_parent(struct device *dev, + const char *name, + const char **parent_names, + u8 num_parents, + u16 *reg_sel, + u8 *reg_mask, + u8 *reg_bits, + unsigned long flags); + #endif /* __UX500_CLK_H */ diff --git a/drivers/clk/versatile/Makefile b/drivers/clk/versatile/Makefile index ec3b88fe3e6..c16ca787170 100644 --- a/drivers/clk/versatile/Makefile +++ b/drivers/clk/versatile/Makefile @@ -3,5 +3,5 @@ obj-$(CONFIG_ICST) += clk-icst.o obj-$(CONFIG_ARCH_INTEGRATOR) += clk-integrator.o obj-$(CONFIG_INTEGRATOR_IMPD1) += clk-impd1.o obj-$(CONFIG_ARCH_REALVIEW) += clk-realview.o -obj-$(CONFIG_ARCH_VEXPRESS) += clk-vexpress.o +obj-$(CONFIG_ARCH_VEXPRESS) += clk-vexpress.o clk-sp810.o obj-$(CONFIG_VEXPRESS_CONFIG) += clk-vexpress-osc.o diff --git a/drivers/clk/versatile/clk-sp810.c b/drivers/clk/versatile/clk-sp810.c new file mode 100644 index 00000000000..bf9b15a585e --- /dev/null +++ b/drivers/clk/versatile/clk-sp810.c @@ -0,0 +1,188 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Copyright (C) 2013 ARM Limited + */ + +#include <linux/amba/sp810.h> +#include <linux/clkdev.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#define to_clk_sp810_timerclken(_hw) \ + container_of(_hw, struct clk_sp810_timerclken, hw) + +struct clk_sp810; + +struct clk_sp810_timerclken { + struct clk_hw hw; + struct clk *clk; + struct clk_sp810 *sp810; + int channel; +}; + +struct clk_sp810 { + struct device_node *node; + int refclk_index, timclk_index; + void __iomem *base; + spinlock_t lock; + struct clk_sp810_timerclken timerclken[4]; + struct clk *refclk; + struct clk *timclk; +}; + +static u8 clk_sp810_timerclken_get_parent(struct clk_hw *hw) +{ + struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); + u32 val = readl(timerclken->sp810->base + SCCTRL); + + return !!(val & (1 << SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel))); +} + +static int clk_sp810_timerclken_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); + struct clk_sp810 *sp810 = timerclken->sp810; + u32 val, shift = SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel); + unsigned long flags = 0; + + if (WARN_ON(index > 1)) + return -EINVAL; + + spin_lock_irqsave(&sp810->lock, flags); + + val = readl(sp810->base + SCCTRL); + val &= ~(1 << shift); + val |= index << shift; + writel(val, sp810->base + SCCTRL); + + spin_unlock_irqrestore(&sp810->lock, flags); + + return 0; +} + +/* + * FIXME - setting the parent every time .prepare is invoked is inefficient. + * This is better handled by a dedicated clock tree configuration mechanism at + * init-time. Revisit this later when such a mechanism exists + */ +static int clk_sp810_timerclken_prepare(struct clk_hw *hw) +{ + struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); + struct clk_sp810 *sp810 = timerclken->sp810; + struct clk *old_parent = __clk_get_parent(hw->clk); + struct clk *new_parent; + + if (!sp810->refclk) + sp810->refclk = of_clk_get(sp810->node, sp810->refclk_index); + + if (!sp810->timclk) + sp810->timclk = of_clk_get(sp810->node, sp810->timclk_index); + + if (WARN_ON(IS_ERR(sp810->refclk) || IS_ERR(sp810->timclk))) + return -ENOENT; + + /* Select fastest parent */ + if (clk_get_rate(sp810->refclk) > clk_get_rate(sp810->timclk)) + new_parent = sp810->refclk; + else + new_parent = sp810->timclk; + + /* Switch the parent if necessary */ + if (old_parent != new_parent) { + clk_prepare(new_parent); + clk_set_parent(hw->clk, new_parent); + clk_unprepare(old_parent); + } + + return 0; +} + +static void clk_sp810_timerclken_unprepare(struct clk_hw *hw) +{ + struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); + struct clk_sp810 *sp810 = timerclken->sp810; + + clk_put(sp810->timclk); + clk_put(sp810->refclk); +} + +static const struct clk_ops clk_sp810_timerclken_ops = { + .prepare = clk_sp810_timerclken_prepare, + .unprepare = clk_sp810_timerclken_unprepare, + .get_parent = clk_sp810_timerclken_get_parent, + .set_parent = clk_sp810_timerclken_set_parent, +}; + +struct clk *clk_sp810_timerclken_of_get(struct of_phandle_args *clkspec, + void *data) +{ + struct clk_sp810 *sp810 = data; + + if (WARN_ON(clkspec->args_count != 1 || clkspec->args[0] > + ARRAY_SIZE(sp810->timerclken))) + return NULL; + + return sp810->timerclken[clkspec->args[0]].clk; +} + +void __init clk_sp810_of_setup(struct device_node *node) +{ + struct clk_sp810 *sp810 = kzalloc(sizeof(*sp810), GFP_KERNEL); + const char *parent_names[2]; + char name[12]; + struct clk_init_data init; + int i; + + if (!sp810) { + pr_err("Failed to allocate memory for SP810!\n"); + return; + } + + sp810->refclk_index = of_property_match_string(node, "clock-names", + "refclk"); + parent_names[0] = of_clk_get_parent_name(node, sp810->refclk_index); + + sp810->timclk_index = of_property_match_string(node, "clock-names", + "timclk"); + parent_names[1] = of_clk_get_parent_name(node, sp810->timclk_index); + + if (parent_names[0] <= 0 || parent_names[1] <= 0) { + pr_warn("Failed to obtain parent clocks for SP810!\n"); + return; + } + + sp810->node = node; + sp810->base = of_iomap(node, 0); + spin_lock_init(&sp810->lock); + + init.name = name; + init.ops = &clk_sp810_timerclken_ops; + init.flags = CLK_IS_BASIC; + init.parent_names = parent_names; + init.num_parents = ARRAY_SIZE(parent_names); + + for (i = 0; i < ARRAY_SIZE(sp810->timerclken); i++) { + snprintf(name, ARRAY_SIZE(name), "timerclken%d", i); + + sp810->timerclken[i].sp810 = sp810; + sp810->timerclken[i].channel = i; + sp810->timerclken[i].hw.init = &init; + + sp810->timerclken[i].clk = clk_register(NULL, + &sp810->timerclken[i].hw); + WARN_ON(IS_ERR(sp810->timerclken[i].clk)); + } + + of_clk_add_provider(node, clk_sp810_timerclken_of_get, sp810); +} +CLK_OF_DECLARE(sp810, "arm,sp810", clk_sp810_of_setup); diff --git a/drivers/clk/versatile/clk-vexpress.c b/drivers/clk/versatile/clk-vexpress.c index 82b45aad8cc..a4a728d0509 100644 --- a/drivers/clk/versatile/clk-vexpress.c +++ b/drivers/clk/versatile/clk-vexpress.c @@ -15,8 +15,6 @@ #include <linux/clkdev.h> #include <linux/clk-provider.h> #include <linux/err.h> -#include <linux/of.h> -#include <linux/of_address.h> #include <linux/vexpress.h> static struct clk *vexpress_sp810_timerclken[4]; @@ -86,50 +84,3 @@ void __init vexpress_clk_init(void __iomem *sp810_base) WARN_ON(clk_register_clkdev(vexpress_sp810_timerclken[1], "v2m-timer1", "sp804")); } - -#if defined(CONFIG_OF) - -struct clk *vexpress_sp810_of_get(struct of_phandle_args *clkspec, void *data) -{ - if (WARN_ON(clkspec->args_count != 1 || clkspec->args[0] > - ARRAY_SIZE(vexpress_sp810_timerclken))) - return NULL; - - return vexpress_sp810_timerclken[clkspec->args[0]]; -} - -void __init vexpress_clk_of_init(void) -{ - struct device_node *node; - struct clk *clk; - struct clk *refclk, *timclk; - - of_clk_init(NULL); - - node = of_find_compatible_node(NULL, NULL, "arm,sp810"); - vexpress_sp810_init(of_iomap(node, 0)); - of_clk_add_provider(node, vexpress_sp810_of_get, NULL); - - /* Select "better" (faster) parent for SP804 timers */ - refclk = of_clk_get_by_name(node, "refclk"); - timclk = of_clk_get_by_name(node, "timclk"); - if (!WARN_ON(IS_ERR(refclk) || IS_ERR(timclk))) { - int i = 0; - - if (clk_get_rate(refclk) > clk_get_rate(timclk)) - clk = refclk; - else - clk = timclk; - - for (i = 0; i < ARRAY_SIZE(vexpress_sp810_timerclken); i++) - WARN_ON(clk_set_parent(vexpress_sp810_timerclken[i], - clk)); - } - - WARN_ON(clk_register_clkdev(vexpress_sp810_timerclken[0], - "v2m-timer0", "sp804")); - WARN_ON(clk_register_clkdev(vexpress_sp810_timerclken[1], - "v2m-timer1", "sp804")); -} - -#endif diff --git a/drivers/clocksource/sunxi_timer.c b/drivers/clocksource/sunxi_timer.c index 4086b916715..0ce85e29769 100644 --- a/drivers/clocksource/sunxi_timer.c +++ b/drivers/clocksource/sunxi_timer.c @@ -23,7 +23,7 @@ #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/sunxi_timer.h> -#include <linux/clk-provider.h> +#include <linux/clk/sunxi.h> #define TIMER_CTL_REG 0x00 #define TIMER_CTL_ENABLE (1 << 0) @@ -123,7 +123,7 @@ void __init sunxi_timer_init(void) if (irq <= 0) panic("Can't parse IRQ"); - of_clk_init(NULL); + sunxi_init_clocks(); clk = of_clk_get(node, 0); if (IS_ERR(clk)) |