/* * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2008 by Sascha Hauer * * 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 #include #include #include #include #include #include #include #include #include "crm_regs.h" #define PRE_DIV_MIN_FREQ 10000000 /* Minimum Frequency after Predivider */ static void __calc_pre_post_dividers(u32 div, u32 *pre, u32 *post) { u32 min_pre, temp_pre, old_err, err; if (div >= 512) { *pre = 8; *post = 64; } else if (div >= 64) { min_pre = (div - 1) / 64 + 1; old_err = 8; for (temp_pre = 8; temp_pre >= min_pre; temp_pre--) { err = div % temp_pre; if (err == 0) { *pre = temp_pre; break; } err = temp_pre - err; if (err < old_err) { old_err = err; *pre = temp_pre; } } *post = (div + *pre - 1) / *pre; } else if (div <= 8) { *pre = div; *post = 1; } else { *pre = 1; *post = div; } } static struct clk mcu_pll_clk; static struct clk mcu_main_clk; static struct clk usb_pll_clk; static struct clk serial_pll_clk; static struct clk ipg_clk; static struct clk ckih_clk; static struct clk ahb_clk; static int _clk_enable(struct clk *clk) { u32 reg; reg = __raw_readl(clk->enable_reg); reg |= 3 << clk->enable_shift; __raw_writel(reg, clk->enable_reg); return 0; } static void _clk_disable(struct clk *clk) { u32 reg; reg = __raw_readl(clk->enable_reg); reg &= ~(3 << clk->enable_shift); __raw_writel(reg, clk->enable_reg); } static void _clk_emi_disable(struct clk *clk) { u32 reg; reg = __raw_readl(clk->enable_reg); reg &= ~(3 << clk->enable_shift); reg |= (1 << clk->enable_shift); __raw_writel(reg, clk->enable_reg); } static int _clk_pll_set_rate(struct clk *clk, unsigned long rate) { u32 reg; signed long pd = 1; /* Pre-divider */ signed long mfi; /* Multiplication Factor (Integer part) */ signed long mfn; /* Multiplication Factor (Integer part) */ signed long mfd; /* Multiplication Factor (Denominator Part) */ signed long tmp; u32 ref_freq = clk_get_rate(clk->parent); while (((ref_freq / pd) * 10) > rate) pd++; if ((ref_freq / pd) < PRE_DIV_MIN_FREQ) return -EINVAL; /* the ref_freq/2 in the following is to round up */ mfi = (((rate / 2) * pd) + (ref_freq / 2)) / ref_freq; if (mfi < 5 || mfi > 15) return -EINVAL; /* pick a mfd value that will work * then solve for mfn */ mfd = ref_freq / 50000; /* * pll_freq * pd * mfd * mfn = -------------------- - (mfi * mfd) * 2 * ref_freq */ /* the tmp/2 is for rounding */ tmp = ref_freq / 10000; mfn = ((((((rate / 2) + (tmp / 2)) / tmp) * pd) * mfd) / 10000) - (mfi * mfd); mfn = mfn & 0x3ff; pd--; mfd--; /* Change the Pll value */ reg = (mfi << MXC_CCM_PCTL_MFI_OFFSET) | (mfn << MXC_CCM_PCTL_MFN_OFFSET) | (mfd << MXC_CCM_PCTL_MFD_OFFSET) | (pd << MXC_CCM_PCTL_PD_OFFSET); if (clk == &mcu_pll_clk) __raw_writel(reg, MXC_CCM_MPCTL); else if (clk == &usb_pll_clk) __raw_writel(reg, MXC_CCM_UPCTL); else if (clk == &serial_pll_clk) __raw_writel(reg, MXC_CCM_SRPCTL); return 0; } static unsigned long _clk_pll_get_rate(struct clk *clk) { unsigned long reg, ccmr; unsigned int prcs, ref_clk; ccmr = __raw_readl(MXC_CCM_CCMR); prcs = (ccmr & MXC_CCM_CCMR_PRCS_MASK) >> MXC_CCM_CCMR_PRCS_OFFSET; if (prcs == 0x1) ref_clk = CKIL_CLK_FREQ * 1024; else ref_clk = clk_get_rate(&ckih_clk); if (clk == &mcu_pll_clk) { if ((ccmr & MXC_CCM_CCMR_MPE) == 0) return ref_clk; if ((ccmr & MXC_CCM_CCMR_MDS) != 0) return ref_clk; reg = __raw_readl(MXC_CCM_MPCTL); } else if (clk == &usb_pll_clk) reg = __raw_readl(MXC_CCM_UPCTL); else if (clk == &serial_pll_clk) reg = __raw_readl(MXC_CCM_SRPCTL); else { BUG(); return 0; } return mxc_decode_pll(reg, ref_clk); } static int _clk_usb_pll_enable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_CCMR); reg |= MXC_CCM_CCMR_UPE; __raw_writel(reg, MXC_CCM_CCMR); /* No lock bit on MX31, so using max time from spec */ udelay(80); return 0; } static void _clk_usb_pll_disable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_CCMR); reg &= ~MXC_CCM_CCMR_UPE; __raw_writel(reg, MXC_CCM_CCMR); } static int _clk_serial_pll_enable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_CCMR); reg |= MXC_CCM_CCMR_SPE; __raw_writel(reg, MXC_CCM_CCMR); /* No lock bit on MX31, so using max time from spec */ udelay(80); return 0; } static void _clk_serial_pll_disable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_CCMR); reg &= ~MXC_CCM_CCMR_SPE; __raw_writel(reg, MXC_CCM_CCMR); } #define PDR0(mask, off) ((__raw_readl(MXC_CCM_PDR0) & mask) >> off) #define PDR1(mask, off) ((__raw_readl(MXC_CCM_PDR1) & mask) >> off) #define PDR2(mask, off) ((__raw_readl(MXC_CCM_PDR2) & mask) >> off) static unsigned long _clk_mcu_main_get_rate(struct clk *clk) { u32 pmcr0 = __raw_readl(MXC_CCM_PMCR0); if ((pmcr0 & MXC_CCM_PMCR0_DFSUP1) == MXC_CCM_PMCR0_DFSUP1_SPLL) return clk_get_rate(&serial_pll_clk); else return clk_get_rate(&mcu_pll_clk); } static unsigned long _clk_hclk_get_rate(struct clk *clk) { unsigned long max_pdf; max_pdf = PDR0(MXC_CCM_PDR0_MAX_PODF_MASK, MXC_CCM_PDR0_MAX_PODF_OFFSET); return clk_get_rate(clk->parent) / (max_pdf + 1); } static unsigned long _clk_ipg_get_rate(struct clk *clk) { unsigned long ipg_pdf; ipg_pdf = PDR0(MXC_CCM_PDR0_IPG_PODF_MASK, MXC_CCM_PDR0_IPG_PODF_OFFSET); return clk_get_rate(clk->parent) / (ipg_pdf + 1); } static unsigned long _clk_nfc_get_rate(struct clk *clk) { unsigned long nfc_pdf; nfc_pdf = PDR0(MXC_CCM_PDR0_NFC_PODF_MASK, MXC_CCM_PDR0_NFC_PODF_OFFSET); return clk_get_rate(clk->parent) / (nfc_pdf + 1); } static unsigned long _clk_hsp_get_rate(struct clk *clk) { unsigned long hsp_pdf; hsp_pdf = PDR0(MXC_CCM_PDR0_HSP_PODF_MASK, MXC_CCM_PDR0_HSP_PODF_OFFSET); return clk_get_rate(clk->parent) / (hsp_pdf + 1); } static unsigned long _clk_usb_get_rate(struct clk *clk) { unsigned long usb_pdf, usb_prepdf; usb_pdf = PDR1(MXC_CCM_PDR1_USB_PODF_MASK, MXC_CCM_PDR1_USB_PODF_OFFSET); usb_prepdf = PDR1(MXC_CCM_PDR1_USB_PRDF_MASK, MXC_CCM_PDR1_USB_PRDF_OFFSET); return clk_get_rate(clk->parent) / (usb_prepdf + 1) / (usb_pdf + 1); } static unsigned long _clk_csi_get_rate(struct clk *clk) { u32 reg, pre, post; reg = __raw_readl(MXC_CCM_PDR0); pre = (reg & MXC_CCM_PDR0_CSI_PRDF_MASK) >> MXC_CCM_PDR0_CSI_PRDF_OFFSET; pre++; post = (reg & MXC_CCM_PDR0_CSI_PODF_MASK) >> MXC_CCM_PDR0_CSI_PODF_OFFSET; post++; return clk_get_rate(clk->parent) / (pre * post); } static unsigned long _clk_csi_round_rate(struct clk *clk, unsigned long rate) { u32 pre, post, parent = clk_get_rate(clk->parent); u32 div = parent / rate; if (parent % rate) div++; __calc_pre_post_dividers(div, &pre, &post); return parent / (pre * post); } static int _clk_csi_set_rate(struct clk *clk, unsigned long rate) { u32 reg, div, pre, post, parent = clk_get_rate(clk->parent); div = parent / rate; if ((parent / div) != rate) return -EINVAL; __calc_pre_post_dividers(div, &pre, &post); /* Set CSI clock divider */ reg = __raw_readl(MXC_CCM_PDR0) & ~(MXC_CCM_PDR0_CSI_PODF_MASK | MXC_CCM_PDR0_CSI_PRDF_MASK); reg |= (post - 1) << MXC_CCM_PDR0_CSI_PODF_OFFSET; reg |= (pre - 1) << MXC_CCM_PDR0_CSI_PRDF_OFFSET; __raw_writel(reg, MXC_CCM_PDR0); return 0; } static unsigned long _clk_per_get_rate(struct clk *clk) { unsigned long per_pdf; per_pdf = PDR0(MXC_CCM_PDR0_PER_PODF_MASK, MXC_CCM_PDR0_PER_PODF_OFFSET); return clk_get_rate(clk->parent) / (per_pdf + 1); } static unsigned long _clk_ssi1_get_rate(struct clk *clk) { unsigned long ssi1_pdf, ssi1_prepdf; ssi1_pdf = PDR1(MXC_CCM_PDR1_SSI1_PODF_MASK, MXC_CCM_PDR1_SSI1_PODF_OFFSET); ssi1_prepdf = PDR1(MXC_CCM_PDR1_SSI1_PRE_PODF_MASK, MXC_CCM_PDR1_SSI1_PRE_PODF_OFFSET); return clk_get_rate(clk->parent) / (ssi1_prepdf + 1) / (ssi1_pdf + 1); } static unsigned long _clk_ssi2_get_rate(struct clk *clk) { unsigned long ssi2_pdf, ssi2_prepdf; ssi2_pdf = PDR1(MXC_CCM_PDR1_SSI2_PODF_MASK, MXC_CCM_PDR1_SSI2_PODF_OFFSET); ssi2_prepdf = PDR1(MXC_CCM_PDR1_SSI2_PRE_PODF_MASK, MXC_CCM_PDR1_SSI2_PRE_PODF_OFFSET); return clk_get_rate(clk->parent) / (ssi2_prepdf + 1) / (ssi2_pdf + 1); } static unsigned long _clk_firi_get_rate(struct clk *clk) { unsigned long firi_pdf, firi_prepdf; firi_pdf = PDR1(MXC_CCM_PDR1_FIRI_PODF_MASK, MXC_CCM_PDR1_FIRI_PODF_OFFSET); firi_prepdf = PDR1(MXC_CCM_PDR1_FIRI_PRE_PODF_MASK, MXC_CCM_PDR1_FIRI_PRE_PODF_OFFSET); return clk_get_rate(clk->parent) / (firi_prepdf + 1) / (firi_pdf + 1); } static unsigned long _clk_firi_round_rate(struct clk *clk, unsigned long rate) { u32 pre, post; u32 parent = clk_get_rate(clk->parent); u32 div = parent / rate; if (parent % rate) div++; __calc_pre_post_dividers(div, &pre, &post); return parent / (pre * post); } static int _clk_firi_set_rate(struct clk *clk, unsigned long rate) { u32 reg, div, pre, post, parent = clk_get_rate(clk->parent); div = parent / rate; if ((parent / div) != rate) return -EINVAL; __calc_pre_post_dividers(div, &pre, &post); /* Set FIRI clock divider */ reg = __raw_readl(MXC_CCM_PDR1) & ~(MXC_CCM_PDR1_FIRI_PODF_MASK | MXC_CCM_PDR1_FIRI_PRE_PODF_MASK); reg |= (pre - 1) << MXC_CCM_PDR1_FIRI_PRE_PODF_OFFSET; reg |= (post - 1) << MXC_CCM_PDR1_FIRI_PODF_OFFSET; __raw_writel(reg, MXC_CCM_PDR1); return 0; } static unsigned long _clk_mbx_get_rate(struct clk *clk) { return clk_get_rate(clk->parent) / 2; } static unsigned long _clk_mstick1_get_rate(struct clk *clk) { unsigned long msti_pdf; msti_pdf = PDR2(MXC_CCM_PDR2_MST1_PDF_MASK, MXC_CCM_PDR2_MST1_PDF_OFFSET); return clk_get_rate(clk->parent) / (msti_pdf + 1); } static unsigned long _clk_mstick2_get_rate(struct clk *clk) { unsigned long msti_pdf; msti_pdf = PDR2(MXC_CCM_PDR2_MST2_PDF_MASK, MXC_CCM_PDR2_MST2_PDF_OFFSET); return clk_get_rate(clk->parent) / (msti_pdf + 1); } static unsigned long ckih_rate; static unsigned long clk_ckih_get_rate(struct clk *clk) { return ckih_rate; } static struct clk ckih_clk = { .name = "ckih", .get_rate = clk_ckih_get_rate, }; static unsigned long clk_ckil_get_rate(struct clk *clk) { return CKIL_CLK_FREQ; } static struct clk ckil_clk = { .name = "ckil", .get_rate = clk_ckil_get_rate, }; static struct clk mcu_pll_clk = { .name = "mcu_pll", .parent = &ckih_clk, .set_rate = _clk_pll_set_rate, .get_rate = _clk_pll_get_rate, }; static struct clk mcu_main_clk = { .name = "mcu_main_clk", .parent = &mcu_pll_clk, .get_rate = _clk_mcu_main_get_rate, }; static struct clk serial_pll_clk = { .name = "serial_pll", .parent = &ckih_clk, .set_rate = _clk_pll_set_rate, .get_rate = _clk_pll_get_rate, .enable = _clk_serial_pll_enable, .disable = _clk_serial_pll_disable, }; static struct clk usb_pll_clk = { .name = "usb_pll", .parent = &ckih_clk, .set_rate = _clk_pll_set_rate, .get_rate = _clk_pll_get_rate, .enable = _clk_usb_pll_enable, .disable = _clk_usb_pll_disable, }; static struct clk ahb_clk = { .name = "ahb_clk", .parent = &mcu_main_clk, .get_rate = _clk_hclk_get_rate, }; static struct clk per_clk = { .name = "per_clk", .parent = &usb_pll_clk, .get_rate = _clk_per_get_rate, }; static struct clk perclk_clk = { .name = "perclk_clk", .parent = &ipg_clk, }; static struct clk cspi_clk[] = { { .name = "cspi_clk", .id = 0, .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_CSPI1_OFFSET, .disable = _clk_disable,}, { .name = "cspi_clk", .id = 1, .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_CSPI2_OFFSET, .disable = _clk_disable,}, { .name = "cspi_clk", .id = 2, .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_CSPI3_OFFSET, .disable = _clk_disable,}, }; static struct clk ipg_clk = { .name = "ipg_clk", .parent = &ahb_clk, .get_rate = _clk_ipg_get_rate, }; static struct clk emi_clk = { .name = "emi_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_EMI_OFFSET, .disable = _clk_emi_disable, }; static struct clk gpt_clk = { .name = "gpt_clk", .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_GPT_OFFSET, .disable = _clk_disable, }; static struct clk pwm_clk = { .name = "pwm_clk", .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR1_PWM_OFFSET, .disable = _clk_disable, }; static struct clk epit_clk[] = { { .name = "epit_clk", .id = 0, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_EPIT1_OFFSET, .disable = _clk_disable,}, { .name = "epit_clk", .id = 1, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_EPIT2_OFFSET, .disable = _clk_disable,}, }; static struct clk nfc_clk = { .name = "nfc_clk", .parent = &ahb_clk, .get_rate = _clk_nfc_get_rate, }; static struct clk scc_clk = { .name = "scc_clk", .parent = &ipg_clk, }; static struct clk ipu_clk = { .name = "ipu_clk", .parent = &mcu_main_clk, .get_rate = _clk_hsp_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_IPU_OFFSET, .disable = _clk_disable, }; static struct clk kpp_clk = { .name = "kpp_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_KPP_OFFSET, .disable = _clk_disable, }; static struct clk wdog_clk = { .name = "wdog_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_WDOG_OFFSET, .disable = _clk_disable, }; static struct clk rtc_clk = { .name = "rtc_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_RTC_OFFSET, .disable = _clk_disable, }; static struct clk usb_clk[] = { { .name = "usb_clk", .parent = &usb_pll_clk, .get_rate = _clk_usb_get_rate,}, { .name = "usb_ahb_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_USBOTG_OFFSET, .disable = _clk_disable,}, }; static struct clk csi_clk = { .name = "csi_clk", .parent = &serial_pll_clk, .get_rate = _clk_csi_get_rate, .round_rate = _clk_csi_round_rate, .set_rate = _clk_csi_set_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_CSI_OFFSET, .disable = _clk_disable, }; static struct clk uart_clk[] = { { .name = "uart_clk", .id = 0, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_UART1_OFFSET, .disable = _clk_disable,}, { .name = "uart_clk", .id = 1, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_UART2_OFFSET, .disable = _clk_disable,}, { .name = "uart_clk", .id = 2, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_UART3_OFFSET, .disable = _clk_disable,}, { .name = "uart_clk", .id = 3, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_UART4_OFFSET, .disable = _clk_disable,}, { .name = "uart_clk", .id = 4, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_UART5_OFFSET, .disable = _clk_disable,}, }; static struct clk i2c_clk[] = { { .name = "i2c_clk", .id = 0, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_I2C1_OFFSET, .disable = _clk_disable,}, { .name = "i2c_clk", .id = 1, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_I2C2_OFFSET, .disable = _clk_disable,}, { .name = "i2c_clk", .id = 2, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_I2C3_OFFSET, .disable = _clk_disable,}, }; static struct clk owire_clk = { .name = "owire_clk", .parent = &perclk_clk, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_OWIRE_OFFSET, .enable = _clk_enable, .disable = _clk_disable, }; static struct clk sdhc_clk[] = { { .name = "sdhc_clk", .id = 0, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_SD_MMC1_OFFSET, .disable = _clk_disable,}, { .name = "sdhc_clk", .id = 1, .parent = &perclk_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_SD_MMC2_OFFSET, .disable = _clk_disable,}, }; static struct clk ssi_clk[] = { { .name = "ssi_clk", .parent = &serial_pll_clk, .get_rate = _clk_ssi1_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_SSI1_OFFSET, .disable = _clk_disable,}, { .name = "ssi_clk", .id = 1, .parent = &serial_pll_clk, .get_rate = _clk_ssi2_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_SSI2_OFFSET, .disable = _clk_disable,}, }; static struct clk firi_clk = { .name = "firi_clk", .parent = &usb_pll_clk, .round_rate = _clk_firi_round_rate, .set_rate = _clk_firi_set_rate, .get_rate = _clk_firi_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_FIRI_OFFSET, .disable = _clk_disable, }; static struct clk ata_clk = { .name = "ata_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_ATA_OFFSET, .disable = _clk_disable, }; static struct clk mbx_clk = { .name = "mbx_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_GACC_OFFSET, .get_rate = _clk_mbx_get_rate, }; static struct clk vpu_clk = { .name = "vpu_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_GACC_OFFSET, .get_rate = _clk_mbx_get_rate, }; static struct clk rtic_clk = { .name = "rtic_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR2, .enable_shift = MXC_CCM_CGR2_RTIC_OFFSET, .disable = _clk_disable, }; static struct clk rng_clk = { .name = "rng_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_RNG_OFFSET, .disable = _clk_disable, }; static struct clk sdma_clk[] = { { .name = "sdma_ahb_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_SDMA_OFFSET, .disable = _clk_disable,}, { .name = "sdma_ipg_clk", .parent = &ipg_clk,} }; static struct clk mpeg4_clk = { .name = "mpeg4_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_HANTRO_OFFSET, .disable = _clk_disable, }; static struct clk vl2cc_clk = { .name = "vl2cc_clk", .parent = &ahb_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_HANTRO_OFFSET, .disable = _clk_disable, }; static struct clk mstick_clk[] = { { .name = "mstick_clk", .id = 0, .parent = &usb_pll_clk, .get_rate = _clk_mstick1_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_MEMSTICK1_OFFSET, .disable = _clk_disable,}, { .name = "mstick_clk", .id = 1, .parent = &usb_pll_clk, .get_rate = _clk_mstick2_get_rate, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR1, .enable_shift = MXC_CCM_CGR1_MEMSTICK2_OFFSET, .disable = _clk_disable,}, }; static struct clk iim_clk = { .name = "iim_clk", .parent = &ipg_clk, .enable = _clk_enable, .enable_reg = MXC_CCM_CGR0, .enable_shift = MXC_CCM_CGR0_IIM_OFFSET, .disable = _clk_disable, }; static unsigned long _clk_cko1_round_rate(struct clk *clk, unsigned long rate) { u32 div, parent = clk_get_rate(clk->parent); div = parent / rate; if (parent % rate) div++; if (div > 8) div = 16; else if (div > 4) div = 8; else if (div > 2) div = 4; return parent / div; } static int _clk_cko1_set_rate(struct clk *clk, unsigned long rate) { u32 reg, div, parent = clk_get_rate(clk->parent); div = parent / rate; if (div == 16) div = 4; else if (div == 8) div = 3; else if (div == 4) div = 2; else if (div == 2) div = 1; else if (div == 1) div = 0; else return -EINVAL; reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOUTDIV_MASK; reg |= div << MXC_CCM_COSR_CLKOUTDIV_OFFSET; __raw_writel(reg, MXC_CCM_COSR); return 0; } static unsigned long _clk_cko1_get_rate(struct clk *clk) { u32 div; div = __raw_readl(MXC_CCM_COSR) & MXC_CCM_COSR_CLKOUTDIV_MASK >> MXC_CCM_COSR_CLKOUTDIV_OFFSET; return clk_get_rate(clk->parent) / (1 << div); } static int _clk_cko1_set_parent(struct clk *clk, struct clk *parent) { u32 reg; reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOSEL_MASK; if (parent == &mcu_main_clk) reg |= 0 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &ipg_clk) reg |= 1 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &usb_pll_clk) reg |= 2 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == mcu_main_clk.parent) reg |= 3 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &ahb_clk) reg |= 5 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &serial_pll_clk) reg |= 7 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &ckih_clk) reg |= 8 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &emi_clk) reg |= 9 << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &ipu_clk) reg |= 0xA << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &nfc_clk) reg |= 0xB << MXC_CCM_COSR_CLKOSEL_OFFSET; else if (parent == &uart_clk[0]) reg |= 0xC << MXC_CCM_COSR_CLKOSEL_OFFSET; else return -EINVAL; __raw_writel(reg, MXC_CCM_COSR); return 0; } static int _clk_cko1_enable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_COSR) | MXC_CCM_COSR_CLKOEN; __raw_writel(reg, MXC_CCM_COSR); return 0; } static void _clk_cko1_disable(struct clk *clk) { u32 reg; reg = __raw_readl(MXC_CCM_COSR) & ~MXC_CCM_COSR_CLKOEN; __raw_writel(reg, MXC_CCM_COSR); } static struct clk cko1_clk = { .name = "cko1_clk", .get_rate = _clk_cko1_get_rate, .set_rate = _clk_cko1_set_rate, .round_rate = _clk_cko1_round_rate, .set_parent = _clk_cko1_set_parent, .enable = _clk_cko1_enable, .disable = _clk_cko1_disable, }; static struct clk *mxc_clks[] = { &ckih_clk, &ckil_clk, &mcu_pll_clk, &usb_pll_clk, &serial_pll_clk, &mcu_main_clk, &ahb_clk, &per_clk, &perclk_clk, &cko1_clk, &emi_clk, &cspi_clk[0], &cspi_clk[1], &cspi_clk[2], &ipg_clk, &gpt_clk, &pwm_clk, &wdog_clk, &rtc_clk, &epit_clk[0], &epit_clk[1], &nfc_clk, &ipu_clk, &kpp_clk, &usb_clk[0], &usb_clk[1], &csi_clk, &uart_clk[0], &uart_clk[1], &uart_clk[2], &uart_clk[3], &uart_clk[4], &i2c_clk[0], &i2c_clk[1], &i2c_clk[2], &owire_clk, &sdhc_clk[0], &sdhc_clk[1], &ssi_clk[0], &ssi_clk[1], &firi_clk, &ata_clk, &rtic_clk, &rng_clk, &sdma_clk[0], &sdma_clk[1], &mstick_clk[0], &mstick_clk[1], &scc_clk, &iim_clk, }; int __init mxc_clocks_init(unsigned long fref) { u32 reg; struct clk **clkp; ckih_rate = fref; for (clkp = mxc_clks; clkp < mxc_clks + ARRAY_SIZE(mxc_clks); clkp++) clk_register(*clkp); if (cpu_is_mx31()) { clk_register(&mpeg4_clk); clk_register(&mbx_clk); } else { clk_register(&vpu_clk); clk_register(&vl2cc_clk); } /* Turn off all possible clocks */ __raw_writel(MXC_CCM_CGR0_GPT_MASK, MXC_CCM_CGR0); __raw_writel(0, MXC_CCM_CGR1); __raw_writel(MXC_CCM_CGR2_EMI_MASK | MXC_CCM_CGR2_IPMUX1_MASK | MXC_CCM_CGR2_IPMUX2_MASK | MXC_CCM_CGR2_MXCCLKENSEL_MASK | /* for MX32 */ MXC_CCM_CGR2_CHIKCAMPEN_MASK | /* for MX32 */ MXC_CCM_CGR2_OVRVPUBUSY_MASK | /* for MX32 */ 1 << 27 | 1 << 28, /* Bit 27 and 28 are not defined for MX32, but still required to be set */ MXC_CCM_CGR2); clk_disable(&cko1_clk); clk_disable(&usb_pll_clk); pr_info("Clock input source is %ld\n", clk_get_rate(&ckih_clk)); clk_enable(&gpt_clk); clk_enable(&emi_clk); clk_enable(&iim_clk); clk_enable(&serial_pll_clk); if (mx31_revision() >= CHIP_REV_2_0) { reg = __raw_readl(MXC_CCM_PMCR1); /* No PLL restart on DVFS switch; enable auto EMI handshake */ reg |= MXC_CCM_PMCR1_PLLRDIS | MXC_CCM_PMCR1_EMIRQ_EN; __raw_writel(reg, MXC_CCM_PMCR1); } return 0; }