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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 09:03:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 09:03:55 -0700
commita7726350e06401929eac0aa0677a5467106565fc (patch)
treee189513e5014bdfccd73a3af731a6b57733743fa /drivers/clocksource
parent4d26aa305414dbb33b3c32fb205b68004cda8ffc (diff)
parentafcf7924ecab726dab0227188783c4a40d9f0eec (diff)
Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanup from Olof Johansson: "Here is a collection of cleanup patches. Among the pieces that stand out are: - The deletion of h720x platforms - Split of at91 non-dt platforms to their own Kconfig file to keep them separate - General cleanups and refactoring of i.MX and MXS platforms - Some restructuring of clock tables for OMAP - Convertion of PMC driver for Tegra to dt-only - Some renames of sunxi -> sun4i (Allwinner A10) - ... plus a bunch of other stuff that I haven't mentioned" * tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (119 commits) ARM: i.MX: remove unused ARCH_* configs ARM i.MX53: remove platform ahci support ARM: sunxi: Rework the restart code irqchip: sunxi: Rename sunxi to sun4i irqchip: sunxi: Make use of the IRQCHIP_DECLARE macro clocksource: sunxi: Rename sunxi to sun4i clocksource: sunxi: make use of CLKSRC_OF clocksource: sunxi: Cleanup the timer code ARM: at91: remove trailing semicolon from macros ARM: at91/setup: fix trivial typos ARM: EXYNOS: remove "config EXYNOS_DEV_DRM" ARM: EXYNOS: change the name of USB ohci header ARM: SAMSUNG: Remove unnecessary code for dma ARM: S3C24XX: Remove unused GPIO drive strength register definitions ARM: OMAP4+: PM: Restore CPU power state to ON with clockdomain force wakeup method ARM: S3C24XX: Removed unneeded dependency on CPU_S3C2412 ARM: S3C24XX: Removed unneeded dependency on CPU_S3C2410 ARM: S3C24XX: Removed unneeded dependency on ARCH_S3C24XX for boards ARM: SAMSUNG: Fix typo "CONFIG_SAMSUNG_DEV_RTC" ARM: S5P64X0: Fix typo "CONFIG_S5P64X0_SETUP_SDHCI" ...
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/Kconfig2
-rw-r--r--drivers/clocksource/Makefile3
-rw-r--r--drivers/clocksource/bcm2835_timer.c12
-rw-r--r--drivers/clocksource/clksrc-of.c5
-rw-r--r--drivers/clocksource/mxs_timer.c304
-rw-r--r--drivers/clocksource/sun4i_timer.c (renamed from drivers/clocksource/sunxi_timer.c)94
-rw-r--r--drivers/clocksource/tegra20_timer.c75
-rw-r--r--drivers/clocksource/vt8500_timer.c16
8 files changed, 382 insertions, 129 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index e507ab7df60..9002185a0a1 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -25,7 +25,7 @@ config DW_APB_TIMER_OF
config ARMADA_370_XP_TIMER
bool
-config SUNXI_TIMER
+config SUN4I_TIMER
bool
config VT8500_TIMER
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 96e25319659..4897f243a00 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -16,7 +16,8 @@ obj-$(CONFIG_CLKSRC_NOMADIK_MTU) += nomadik-mtu.o
obj-$(CONFIG_CLKSRC_DBX500_PRCMU) += clksrc-dbx500-prcmu.o
obj-$(CONFIG_ARMADA_370_XP_TIMER) += time-armada-370-xp.o
obj-$(CONFIG_ARCH_BCM2835) += bcm2835_timer.o
-obj-$(CONFIG_SUNXI_TIMER) += sunxi_timer.o
+obj-$(CONFIG_ARCH_MXS) += mxs_timer.o
+obj-$(CONFIG_SUN4I_TIMER) += sun4i_timer.o
obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o
obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o
obj-$(CONFIG_ARCH_BCM) += bcm_kona_timer.o
diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c
index 50c68fef944..766611d2994 100644
--- a/drivers/clocksource/bcm2835_timer.c
+++ b/drivers/clocksource/bcm2835_timer.c
@@ -95,23 +95,13 @@ static irqreturn_t bcm2835_time_interrupt(int irq, void *dev_id)
}
}
-static struct of_device_id bcm2835_time_match[] __initconst = {
- { .compatible = "brcm,bcm2835-system-timer" },
- {}
-};
-
-static void __init bcm2835_timer_init(void)
+static void __init bcm2835_timer_init(struct device_node *node)
{
- struct device_node *node;
void __iomem *base;
u32 freq;
int irq;
struct bcm2835_timer *timer;
- node = of_find_matching_node(NULL, bcm2835_time_match);
- if (!node)
- panic("No bcm2835 timer node");
-
base = of_iomap(node, 0);
if (!base)
panic("Can't remap registers");
diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-of.c
index bdabdaa8d00..37f5325bec9 100644
--- a/drivers/clocksource/clksrc-of.c
+++ b/drivers/clocksource/clksrc-of.c
@@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/of.h>
+#include <linux/clocksource.h>
extern struct of_device_id __clksrc_of_table[];
@@ -26,10 +27,10 @@ void __init clocksource_of_init(void)
{
struct device_node *np;
const struct of_device_id *match;
- void (*init_func)(void);
+ clocksource_of_init_fn init_func;
for_each_matching_node_and_match(np, __clksrc_of_table, &match) {
init_func = match->data;
- init_func();
+ init_func(np);
}
}
diff --git a/drivers/clocksource/mxs_timer.c b/drivers/clocksource/mxs_timer.c
new file mode 100644
index 00000000000..02af4204af8
--- /dev/null
+++ b/drivers/clocksource/mxs_timer.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (C) 2000-2001 Deep Blue Solutions
+ * Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ * Copyright (C) 2006-2007 Pavel Pisa (ppisa@pikron.com)
+ * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/clockchips.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/stmp_device.h>
+
+#include <asm/mach/time.h>
+#include <asm/sched_clock.h>
+
+/*
+ * There are 2 versions of the timrot on Freescale MXS-based SoCs.
+ * The v1 on MX23 only gets 16 bits counter, while v2 on MX28
+ * extends the counter to 32 bits.
+ *
+ * The implementation uses two timers, one for clock_event and
+ * another for clocksource. MX28 uses timrot 0 and 1, while MX23
+ * uses 0 and 2.
+ */
+
+#define MX23_TIMROT_VERSION_OFFSET 0x0a0
+#define MX28_TIMROT_VERSION_OFFSET 0x120
+#define BP_TIMROT_MAJOR_VERSION 24
+#define BV_TIMROT_VERSION_1 0x01
+#define BV_TIMROT_VERSION_2 0x02
+#define timrot_is_v1() (timrot_major_version == BV_TIMROT_VERSION_1)
+
+/*
+ * There are 4 registers for each timrotv2 instance, and 2 registers
+ * for each timrotv1. So address step 0x40 in macros below strides
+ * one instance of timrotv2 while two instances of timrotv1.
+ *
+ * As the result, HW_TIMROT_XXXn(1) defines the address of timrot1
+ * on MX28 while timrot2 on MX23.
+ */
+/* common between v1 and v2 */
+#define HW_TIMROT_ROTCTRL 0x00
+#define HW_TIMROT_TIMCTRLn(n) (0x20 + (n) * 0x40)
+/* v1 only */
+#define HW_TIMROT_TIMCOUNTn(n) (0x30 + (n) * 0x40)
+/* v2 only */
+#define HW_TIMROT_RUNNING_COUNTn(n) (0x30 + (n) * 0x40)
+#define HW_TIMROT_FIXED_COUNTn(n) (0x40 + (n) * 0x40)
+
+#define BM_TIMROT_TIMCTRLn_RELOAD (1 << 6)
+#define BM_TIMROT_TIMCTRLn_UPDATE (1 << 7)
+#define BM_TIMROT_TIMCTRLn_IRQ_EN (1 << 14)
+#define BM_TIMROT_TIMCTRLn_IRQ (1 << 15)
+#define BP_TIMROT_TIMCTRLn_SELECT 0
+#define BV_TIMROTv1_TIMCTRLn_SELECT__32KHZ_XTAL 0x8
+#define BV_TIMROTv2_TIMCTRLn_SELECT__32KHZ_XTAL 0xb
+#define BV_TIMROTv2_TIMCTRLn_SELECT__TICK_ALWAYS 0xf
+
+static struct clock_event_device mxs_clockevent_device;
+static enum clock_event_mode mxs_clockevent_mode = CLOCK_EVT_MODE_UNUSED;
+
+static void __iomem *mxs_timrot_base;
+static u32 timrot_major_version;
+
+static inline void timrot_irq_disable(void)
+{
+ __raw_writel(BM_TIMROT_TIMCTRLn_IRQ_EN, mxs_timrot_base +
+ HW_TIMROT_TIMCTRLn(0) + STMP_OFFSET_REG_CLR);
+}
+
+static inline void timrot_irq_enable(void)
+{
+ __raw_writel(BM_TIMROT_TIMCTRLn_IRQ_EN, mxs_timrot_base +
+ HW_TIMROT_TIMCTRLn(0) + STMP_OFFSET_REG_SET);
+}
+
+static void timrot_irq_acknowledge(void)
+{
+ __raw_writel(BM_TIMROT_TIMCTRLn_IRQ, mxs_timrot_base +
+ HW_TIMROT_TIMCTRLn(0) + STMP_OFFSET_REG_CLR);
+}
+
+static cycle_t timrotv1_get_cycles(struct clocksource *cs)
+{
+ return ~((__raw_readl(mxs_timrot_base + HW_TIMROT_TIMCOUNTn(1))
+ & 0xffff0000) >> 16);
+}
+
+static int timrotv1_set_next_event(unsigned long evt,
+ struct clock_event_device *dev)
+{
+ /* timrot decrements the count */
+ __raw_writel(evt, mxs_timrot_base + HW_TIMROT_TIMCOUNTn(0));
+
+ return 0;
+}
+
+static int timrotv2_set_next_event(unsigned long evt,
+ struct clock_event_device *dev)
+{
+ /* timrot decrements the count */
+ __raw_writel(evt, mxs_timrot_base + HW_TIMROT_FIXED_COUNTn(0));
+
+ return 0;
+}
+
+static irqreturn_t mxs_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+
+ timrot_irq_acknowledge();
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction mxs_timer_irq = {
+ .name = "MXS Timer Tick",
+ .dev_id = &mxs_clockevent_device,
+ .flags = IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = mxs_timer_interrupt,
+};
+
+#ifdef DEBUG
+static const char *clock_event_mode_label[] const = {
+ [CLOCK_EVT_MODE_PERIODIC] = "CLOCK_EVT_MODE_PERIODIC",
+ [CLOCK_EVT_MODE_ONESHOT] = "CLOCK_EVT_MODE_ONESHOT",
+ [CLOCK_EVT_MODE_SHUTDOWN] = "CLOCK_EVT_MODE_SHUTDOWN",
+ [CLOCK_EVT_MODE_UNUSED] = "CLOCK_EVT_MODE_UNUSED"
+};
+#endif /* DEBUG */
+
+static void mxs_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ /* Disable interrupt in timer module */
+ timrot_irq_disable();
+
+ if (mode != mxs_clockevent_mode) {
+ /* Set event time into the furthest future */
+ if (timrot_is_v1())
+ __raw_writel(0xffff,
+ mxs_timrot_base + HW_TIMROT_TIMCOUNTn(1));
+ else
+ __raw_writel(0xffffffff,
+ mxs_timrot_base + HW_TIMROT_FIXED_COUNTn(1));
+
+ /* Clear pending interrupt */
+ timrot_irq_acknowledge();
+ }
+
+#ifdef DEBUG
+ pr_info("%s: changing mode from %s to %s\n", __func__,
+ clock_event_mode_label[mxs_clockevent_mode],
+ clock_event_mode_label[mode]);
+#endif /* DEBUG */
+
+ /* Remember timer mode */
+ mxs_clockevent_mode = mode;
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ pr_err("%s: Periodic mode is not implemented\n", __func__);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ timrot_irq_enable();
+ break;
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_RESUME:
+ /* Left event sources disabled, no more interrupts appear */
+ break;
+ }
+}
+
+static struct clock_event_device mxs_clockevent_device = {
+ .name = "mxs_timrot",
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .set_mode = mxs_set_mode,
+ .set_next_event = timrotv2_set_next_event,
+ .rating = 200,
+};
+
+static int __init mxs_clockevent_init(struct clk *timer_clk)
+{
+ if (timrot_is_v1())
+ mxs_clockevent_device.set_next_event = timrotv1_set_next_event;
+ mxs_clockevent_device.cpumask = cpumask_of(0);
+ clockevents_config_and_register(&mxs_clockevent_device,
+ clk_get_rate(timer_clk),
+ timrot_is_v1() ? 0xf : 0x2,
+ timrot_is_v1() ? 0xfffe : 0xfffffffe);
+
+ return 0;
+}
+
+static struct clocksource clocksource_mxs = {
+ .name = "mxs_timer",
+ .rating = 200,
+ .read = timrotv1_get_cycles,
+ .mask = CLOCKSOURCE_MASK(16),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 notrace mxs_read_sched_clock_v2(void)
+{
+ return ~readl_relaxed(mxs_timrot_base + HW_TIMROT_RUNNING_COUNTn(1));
+}
+
+static int __init mxs_clocksource_init(struct clk *timer_clk)
+{
+ unsigned int c = clk_get_rate(timer_clk);
+
+ if (timrot_is_v1())
+ clocksource_register_hz(&clocksource_mxs, c);
+ else {
+ clocksource_mmio_init(mxs_timrot_base + HW_TIMROT_RUNNING_COUNTn(1),
+ "mxs_timer", c, 200, 32, clocksource_mmio_readl_down);
+ setup_sched_clock(mxs_read_sched_clock_v2, 32, c);
+ }
+
+ return 0;
+}
+
+static void __init mxs_timer_init(struct device_node *np)
+{
+ struct clk *timer_clk;
+ int irq;
+
+ mxs_timrot_base = of_iomap(np, 0);
+ WARN_ON(!mxs_timrot_base);
+
+ timer_clk = of_clk_get(np, 0);
+ if (IS_ERR(timer_clk)) {
+ pr_err("%s: failed to get clk\n", __func__);
+ return;
+ }
+
+ clk_prepare_enable(timer_clk);
+
+ /*
+ * Initialize timers to a known state
+ */
+ stmp_reset_block(mxs_timrot_base + HW_TIMROT_ROTCTRL);
+
+ /* get timrot version */
+ timrot_major_version = __raw_readl(mxs_timrot_base +
+ (of_device_is_compatible(np, "fsl,imx23-timrot") ?
+ MX23_TIMROT_VERSION_OFFSET :
+ MX28_TIMROT_VERSION_OFFSET));
+ timrot_major_version >>= BP_TIMROT_MAJOR_VERSION;
+
+ /* one for clock_event */
+ __raw_writel((timrot_is_v1() ?
+ BV_TIMROTv1_TIMCTRLn_SELECT__32KHZ_XTAL :
+ BV_TIMROTv2_TIMCTRLn_SELECT__TICK_ALWAYS) |
+ BM_TIMROT_TIMCTRLn_UPDATE |
+ BM_TIMROT_TIMCTRLn_IRQ_EN,
+ mxs_timrot_base + HW_TIMROT_TIMCTRLn(0));
+
+ /* another for clocksource */
+ __raw_writel((timrot_is_v1() ?
+ BV_TIMROTv1_TIMCTRLn_SELECT__32KHZ_XTAL :
+ BV_TIMROTv2_TIMCTRLn_SELECT__TICK_ALWAYS) |
+ BM_TIMROT_TIMCTRLn_RELOAD,
+ mxs_timrot_base + HW_TIMROT_TIMCTRLn(1));
+
+ /* set clocksource timer fixed count to the maximum */
+ if (timrot_is_v1())
+ __raw_writel(0xffff,
+ mxs_timrot_base + HW_TIMROT_TIMCOUNTn(1));
+ else
+ __raw_writel(0xffffffff,
+ mxs_timrot_base + HW_TIMROT_FIXED_COUNTn(1));
+
+ /* init and register the timer to the framework */
+ mxs_clocksource_init(timer_clk);
+ mxs_clockevent_init(timer_clk);
+
+ /* Make irqs happen */
+ irq = irq_of_parse_and_map(np, 0);
+ setup_irq(irq, &mxs_timer_irq);
+}
+CLOCKSOURCE_OF_DECLARE(mxs, "fsl,timrot", mxs_timer_init);
diff --git a/drivers/clocksource/sunxi_timer.c b/drivers/clocksource/sun4i_timer.c
index 0ce85e29769..d4674e78ef3 100644
--- a/drivers/clocksource/sunxi_timer.c
+++ b/drivers/clocksource/sun4i_timer.c
@@ -22,66 +22,64 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
-#include <linux/sunxi_timer.h>
-#include <linux/clk/sunxi.h>
-#define TIMER_CTL_REG 0x00
-#define TIMER_CTL_ENABLE (1 << 0)
+#define TIMER_IRQ_EN_REG 0x00
+#define TIMER_IRQ_EN(val) (1 << val)
#define TIMER_IRQ_ST_REG 0x04
-#define TIMER0_CTL_REG 0x10
-#define TIMER0_CTL_ENABLE (1 << 0)
-#define TIMER0_CTL_AUTORELOAD (1 << 1)
-#define TIMER0_CTL_ONESHOT (1 << 7)
-#define TIMER0_INTVAL_REG 0x14
-#define TIMER0_CNTVAL_REG 0x18
+#define TIMER_CTL_REG(val) (0x10 * val + 0x10)
+#define TIMER_CTL_ENABLE (1 << 0)
+#define TIMER_CTL_AUTORELOAD (1 << 1)
+#define TIMER_CTL_ONESHOT (1 << 7)
+#define TIMER_INTVAL_REG(val) (0x10 * val + 0x14)
+#define TIMER_CNTVAL_REG(val) (0x10 * val + 0x18)
#define TIMER_SCAL 16
static void __iomem *timer_base;
-static void sunxi_clkevt_mode(enum clock_event_mode mode,
+static void sun4i_clkevt_mode(enum clock_event_mode mode,
struct clock_event_device *clk)
{
- u32 u = readl(timer_base + TIMER0_CTL_REG);
+ u32 u = readl(timer_base + TIMER_CTL_REG(0));
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- u &= ~(TIMER0_CTL_ONESHOT);
- writel(u | TIMER0_CTL_ENABLE, timer_base + TIMER0_CTL_REG);
+ u &= ~(TIMER_CTL_ONESHOT);
+ writel(u | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0));
break;
case CLOCK_EVT_MODE_ONESHOT:
- writel(u | TIMER0_CTL_ONESHOT, timer_base + TIMER0_CTL_REG);
+ writel(u | TIMER_CTL_ONESHOT, timer_base + TIMER_CTL_REG(0));
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
default:
- writel(u & ~(TIMER0_CTL_ENABLE), timer_base + TIMER0_CTL_REG);
+ writel(u & ~(TIMER_CTL_ENABLE), timer_base + TIMER_CTL_REG(0));
break;
}
}
-static int sunxi_clkevt_next_event(unsigned long evt,
+static int sun4i_clkevt_next_event(unsigned long evt,
struct clock_event_device *unused)
{
- u32 u = readl(timer_base + TIMER0_CTL_REG);
- writel(evt, timer_base + TIMER0_CNTVAL_REG);
- writel(u | TIMER0_CTL_ENABLE | TIMER0_CTL_AUTORELOAD,
- timer_base + TIMER0_CTL_REG);
+ u32 u = readl(timer_base + TIMER_CTL_REG(0));
+ writel(evt, timer_base + TIMER_CNTVAL_REG(0));
+ writel(u | TIMER_CTL_ENABLE | TIMER_CTL_AUTORELOAD,
+ timer_base + TIMER_CTL_REG(0));
return 0;
}
-static struct clock_event_device sunxi_clockevent = {
- .name = "sunxi_tick",
+static struct clock_event_device sun4i_clockevent = {
+ .name = "sun4i_tick",
.rating = 300,
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = sunxi_clkevt_mode,
- .set_next_event = sunxi_clkevt_next_event,
+ .set_mode = sun4i_clkevt_mode,
+ .set_next_event = sun4i_clkevt_next_event,
};
-static irqreturn_t sunxi_timer_interrupt(int irq, void *dev_id)
+static irqreturn_t sun4i_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = (struct clock_event_device *)dev_id;
@@ -91,30 +89,20 @@ static irqreturn_t sunxi_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static struct irqaction sunxi_timer_irq = {
- .name = "sunxi_timer0",
+static struct irqaction sun4i_timer_irq = {
+ .name = "sun4i_timer0",
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = sunxi_timer_interrupt,
- .dev_id = &sunxi_clockevent,
-};
-
-static struct of_device_id sunxi_timer_dt_ids[] = {
- { .compatible = "allwinner,sunxi-timer" },
- { }
+ .handler = sun4i_timer_interrupt,
+ .dev_id = &sun4i_clockevent,
};
-void __init sunxi_timer_init(void)
+static void __init sun4i_timer_init(struct device_node *node)
{
- struct device_node *node;
unsigned long rate = 0;
struct clk *clk;
int ret, irq;
u32 val;
- node = of_find_matching_node(NULL, sunxi_timer_dt_ids);
- if (!node)
- panic("No sunxi timer node");
-
timer_base = of_iomap(node, 0);
if (!timer_base)
panic("Can't map registers");
@@ -123,8 +111,6 @@ void __init sunxi_timer_init(void)
if (irq <= 0)
panic("Can't parse IRQ");
- sunxi_init_clocks();
-
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("Can't get timer clock");
@@ -132,29 +118,31 @@ void __init sunxi_timer_init(void)
rate = clk_get_rate(clk);
writel(rate / (TIMER_SCAL * HZ),
- timer_base + TIMER0_INTVAL_REG);
+ timer_base + TIMER_INTVAL_REG(0));
/* set clock source to HOSC, 16 pre-division */
- val = readl(timer_base + TIMER0_CTL_REG);
+ val = readl(timer_base + TIMER_CTL_REG(0));
val &= ~(0x07 << 4);
val &= ~(0x03 << 2);
val |= (4 << 4) | (1 << 2);
- writel(val, timer_base + TIMER0_CTL_REG);
+ writel(val, timer_base + TIMER_CTL_REG(0));
/* set mode to auto reload */
- val = readl(timer_base + TIMER0_CTL_REG);
- writel(val | TIMER0_CTL_AUTORELOAD, timer_base + TIMER0_CTL_REG);
+ val = readl(timer_base + TIMER_CTL_REG(0));
+ writel(val | TIMER_CTL_AUTORELOAD, timer_base + TIMER_CTL_REG(0));
- ret = setup_irq(irq, &sunxi_timer_irq);
+ ret = setup_irq(irq, &sun4i_timer_irq);
if (ret)
pr_warn("failed to setup irq %d\n", irq);
/* Enable timer0 interrupt */
- val = readl(timer_base + TIMER_CTL_REG);
- writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG);
+ val = readl(timer_base + TIMER_IRQ_EN_REG);
+ writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG);
- sunxi_clockevent.cpumask = cpumask_of(0);
+ sun4i_clockevent.cpumask = cpumask_of(0);
- clockevents_config_and_register(&sunxi_clockevent, rate / TIMER_SCAL,
+ clockevents_config_and_register(&sun4i_clockevent, rate / TIMER_SCAL,
0x1, 0xff);
}
+CLOCKSOURCE_OF_DECLARE(sun4i, "allwinner,sun4i-timer",
+ sun4i_timer_init);
diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c
index 0bde03feb09..ae877b021b5 100644
--- a/drivers/clocksource/tegra20_timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -154,29 +154,12 @@ static struct irqaction tegra_timer_irq = {
.dev_id = &tegra_clockevent,
};
-static const struct of_device_id timer_match[] __initconst = {
- { .compatible = "nvidia,tegra20-timer" },
- {}
-};
-
-static const struct of_device_id rtc_match[] __initconst = {
- { .compatible = "nvidia,tegra20-rtc" },
- {}
-};
-
-static void __init tegra20_init_timer(void)
+static void __init tegra20_init_timer(struct device_node *np)
{
- struct device_node *np;
struct clk *clk;
unsigned long rate;
int ret;
- np = of_find_matching_node(NULL, timer_match);
- if (!np) {
- pr_err("Failed to find timer DT node\n");
- BUG();
- }
-
timer_reg_base = of_iomap(np, 0);
if (!timer_reg_base) {
pr_err("Can't map timer registers\n");
@@ -189,7 +172,7 @@ static void __init tegra20_init_timer(void)
BUG();
}
- clk = clk_get_sys("timer", NULL);
+ clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
pr_warn("Unable to get timer clock. Assuming 12Mhz input clock.\n");
rate = 12000000;
@@ -200,30 +183,6 @@ static void __init tegra20_init_timer(void)
of_node_put(np);
- np = of_find_matching_node(NULL, rtc_match);
- if (!np) {
- pr_err("Failed to find RTC DT node\n");
- BUG();
- }
-
- rtc_base = of_iomap(np, 0);
- if (!rtc_base) {
- pr_err("Can't map RTC registers");
- BUG();
- }
-
- /*
- * rtc registers are used by read_persistent_clock, keep the rtc clock
- * enabled
- */
- clk = clk_get_sys("rtc-tegra", NULL);
- if (IS_ERR(clk))
- pr_warn("Unable to get rtc-tegra clock\n");
- else
- clk_prepare_enable(clk);
-
- of_node_put(np);
-
switch (rate) {
case 12000000:
timer_writel(0x000b, TIMERUS_USEC_CFG);
@@ -259,12 +218,34 @@ static void __init tegra20_init_timer(void)
tegra_clockevent.irq = tegra_timer_irq.irq;
clockevents_config_and_register(&tegra_clockevent, 1000000,
0x1, 0x1fffffff);
-#ifdef CONFIG_HAVE_ARM_TWD
- twd_local_timer_of_register();
-#endif
+}
+CLOCKSOURCE_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra20_init_timer);
+
+static void __init tegra20_init_rtc(struct device_node *np)
+{
+ struct clk *clk;
+
+ rtc_base = of_iomap(np, 0);
+ if (!rtc_base) {
+ pr_err("Can't map RTC registers");
+ BUG();
+ }
+
+ /*
+ * rtc registers are used by read_persistent_clock, keep the rtc clock
+ * enabled
+ */
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk))
+ pr_warn("Unable to get rtc-tegra clock\n");
+ else
+ clk_prepare_enable(clk);
+
+ of_node_put(np);
+
register_persistent_clock(NULL, tegra_read_persistent_clock);
}
-CLOCKSOURCE_OF_DECLARE(tegra20, "nvidia,tegra20-timer", tegra20_init_timer);
+CLOCKSOURCE_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);
#ifdef CONFIG_PM
static u32 usec_config;
diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
index 8efc86b5b5d..64f553f04fa 100644
--- a/drivers/clocksource/vt8500_timer.c
+++ b/drivers/clocksource/vt8500_timer.c
@@ -129,22 +129,10 @@ static struct irqaction irq = {
.dev_id = &clockevent,
};
-static struct of_device_id vt8500_timer_ids[] = {
- { .compatible = "via,vt8500-timer" },
- { }
-};
-
-static void __init vt8500_timer_init(void)
+static void __init vt8500_timer_init(struct device_node *np)
{
- struct device_node *np;
int timer_irq;
- np = of_find_matching_node(NULL, vt8500_timer_ids);
- if (!np) {
- pr_err("%s: Timer description missing from Device Tree\n",
- __func__);
- return;
- }
regbase = of_iomap(np, 0);
if (!regbase) {
pr_err("%s: Missing iobase description in Device Tree\n",
@@ -177,4 +165,4 @@ static void __init vt8500_timer_init(void)
4, 0xf0000000);
}
-CLOCKSOURCE_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init)
+CLOCKSOURCE_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init);