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-rw-r--r--arch/arm/mach-mx2/clock_imx21.c984
1 files changed, 984 insertions, 0 deletions
diff --git a/arch/arm/mach-mx2/clock_imx21.c b/arch/arm/mach-mx2/clock_imx21.c
new file mode 100644
index 000000000000..2dee5c87614c
--- /dev/null
+++ b/arch/arm/mach-mx2/clock_imx21.c
@@ -0,0 +1,984 @@
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ * Copyright 2008 Martin Fuzzey, mfuzzey@gmail.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.
+ * 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/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <mach/clock.h>
+#include <mach/common.h>
+#include <asm/clkdev.h>
+#include <asm/div64.h>
+
+#include "crm_regs.h"
+
+static int _clk_enable(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(clk->enable_reg);
+ reg |= 1 << 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 &= ~(1 << clk->enable_shift);
+ __raw_writel(reg, clk->enable_reg);
+}
+
+static int _clk_spll_enable(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(CCM_CSCR);
+ reg |= CCM_CSCR_SPEN;
+ __raw_writel(reg, CCM_CSCR);
+
+ while ((__raw_readl(CCM_SPCTL1) & CCM_SPCTL1_LF) == 0)
+ ;
+ return 0;
+}
+
+static void _clk_spll_disable(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(CCM_CSCR);
+ reg &= ~CCM_CSCR_SPEN;
+ __raw_writel(reg, CCM_CSCR);
+}
+
+
+#define CSCR() (__raw_readl(CCM_CSCR))
+#define PCDR0() (__raw_readl(CCM_PCDR0))
+#define PCDR1() (__raw_readl(CCM_PCDR1))
+
+static unsigned long _clk_perclkx_round_rate(struct clk *clk,
+ unsigned long rate)
+{
+ u32 div;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ div = parent_rate / rate;
+ if (parent_rate % rate)
+ div++;
+
+ if (div > 64)
+ div = 64;
+
+ return parent_rate / div;
+}
+
+static int _clk_perclkx_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 reg;
+ u32 div;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ if (clk->id < 0 || clk->id > 3)
+ return -EINVAL;
+
+ div = parent_rate / rate;
+ if (div > 64 || div < 1 || ((parent_rate / div) != rate))
+ return -EINVAL;
+ div--;
+
+ reg =
+ __raw_readl(CCM_PCDR1) & ~(CCM_PCDR1_PERDIV1_MASK <<
+ (clk->id << 3));
+ reg |= div << (clk->id << 3);
+ __raw_writel(reg, CCM_PCDR1);
+
+ return 0;
+}
+
+static unsigned long _clk_usb_recalc(struct clk *clk)
+{
+ unsigned long usb_pdf;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ usb_pdf = (CSCR() & CCM_CSCR_USB_MASK) >> CCM_CSCR_USB_OFFSET;
+
+ return parent_rate / (usb_pdf + 1U);
+}
+
+static unsigned long _clk_ssix_recalc(struct clk *clk, unsigned long pdf)
+{
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ pdf = (pdf < 2) ? 124UL : pdf; /* MX21 & MX27 TO1 */
+
+ return 2UL * parent_rate / pdf;
+}
+
+static unsigned long _clk_ssi1_recalc(struct clk *clk)
+{
+ return _clk_ssix_recalc(clk,
+ (PCDR0() & CCM_PCDR0_SSI1BAUDDIV_MASK)
+ >> CCM_PCDR0_SSI1BAUDDIV_OFFSET);
+}
+
+static unsigned long _clk_ssi2_recalc(struct clk *clk)
+{
+ return _clk_ssix_recalc(clk,
+ (PCDR0() & CCM_PCDR0_SSI2BAUDDIV_MASK) >>
+ CCM_PCDR0_SSI2BAUDDIV_OFFSET);
+}
+
+static unsigned long _clk_nfc_recalc(struct clk *clk)
+{
+ unsigned long nfc_pdf;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ nfc_pdf = (PCDR0() & CCM_PCDR0_NFCDIV_MASK)
+ >> CCM_PCDR0_NFCDIV_OFFSET;
+
+ return parent_rate / (nfc_pdf + 1);
+}
+
+static unsigned long _clk_parent_round_rate(struct clk *clk, unsigned long rate)
+{
+ return clk->parent->round_rate(clk->parent, rate);
+}
+
+static int _clk_parent_set_rate(struct clk *clk, unsigned long rate)
+{
+ return clk->parent->set_rate(clk->parent, rate);
+}
+
+static unsigned long external_high_reference; /* in Hz */
+
+static unsigned long get_high_reference_clock_rate(struct clk *clk)
+{
+ return external_high_reference;
+}
+
+/*
+ * the high frequency external clock reference
+ * Default case is 26MHz.
+ */
+static struct clk ckih_clk = {
+ .get_rate = get_high_reference_clock_rate,
+};
+
+static unsigned long external_low_reference; /* in Hz */
+
+static unsigned long get_low_reference_clock_rate(struct clk *clk)
+{
+ return external_low_reference;
+}
+
+/*
+ * the low frequency external clock reference
+ * Default case is 32.768kHz.
+ */
+static struct clk ckil_clk = {
+ .get_rate = get_low_reference_clock_rate,
+};
+
+
+static unsigned long _clk_fpm_recalc(struct clk *clk)
+{
+ return clk_get_rate(clk->parent) * 512;
+}
+
+/* Output of frequency pre multiplier */
+static struct clk fpm_clk = {
+ .parent = &ckil_clk,
+ .get_rate = _clk_fpm_recalc,
+};
+
+static unsigned long get_mpll_clk(struct clk *clk)
+{
+ uint32_t reg;
+ unsigned long ref_clk;
+ unsigned long mfi = 0, mfn = 0, mfd = 0, pdf = 0;
+ unsigned long long temp;
+
+ ref_clk = clk_get_rate(clk->parent);
+
+ reg = __raw_readl(CCM_MPCTL0);
+ pdf = (reg & CCM_MPCTL0_PD_MASK) >> CCM_MPCTL0_PD_OFFSET;
+ mfd = (reg & CCM_MPCTL0_MFD_MASK) >> CCM_MPCTL0_MFD_OFFSET;
+ mfi = (reg & CCM_MPCTL0_MFI_MASK) >> CCM_MPCTL0_MFI_OFFSET;
+ mfn = (reg & CCM_MPCTL0_MFN_MASK) >> CCM_MPCTL0_MFN_OFFSET;
+
+ mfi = (mfi <= 5) ? 5 : mfi;
+ temp = 2LL * ref_clk * mfn;
+ do_div(temp, mfd + 1);
+ temp = 2LL * ref_clk * mfi + temp;
+ do_div(temp, pdf + 1);
+
+ return (unsigned long)temp;
+}
+
+static struct clk mpll_clk = {
+ .parent = &ckih_clk,
+ .get_rate = get_mpll_clk,
+};
+
+static unsigned long _clk_fclk_get_rate(struct clk *clk)
+{
+ unsigned long parent_rate;
+ u32 div;
+
+ div = (CSCR() & CCM_CSCR_PRESC_MASK) >> CCM_CSCR_PRESC_OFFSET;
+ parent_rate = clk_get_rate(clk->parent);
+
+ return parent_rate / (div+1);
+}
+
+static struct clk fclk_clk = {
+ .parent = &mpll_clk,
+ .get_rate = _clk_fclk_get_rate
+};
+
+static unsigned long get_spll_clk(struct clk *clk)
+{
+ uint32_t reg;
+ unsigned long ref_clk;
+ unsigned long mfi = 0, mfn = 0, mfd = 0, pdf = 0;
+ unsigned long long temp;
+
+ ref_clk = clk_get_rate(clk->parent);
+
+ reg = __raw_readl(CCM_SPCTL0);
+ pdf = (reg & CCM_SPCTL0_PD_MASK) >> CCM_SPCTL0_PD_OFFSET;
+ mfd = (reg & CCM_SPCTL0_MFD_MASK) >> CCM_SPCTL0_MFD_OFFSET;
+ mfi = (reg & CCM_SPCTL0_MFI_MASK) >> CCM_SPCTL0_MFI_OFFSET;
+ mfn = (reg & CCM_SPCTL0_MFN_MASK) >> CCM_SPCTL0_MFN_OFFSET;
+
+ mfi = (mfi <= 5) ? 5 : mfi;
+ temp = 2LL * ref_clk * mfn;
+ do_div(temp, mfd + 1);
+ temp = 2LL * ref_clk * mfi + temp;
+ do_div(temp, pdf + 1);
+
+ return (unsigned long)temp;
+}
+
+static struct clk spll_clk = {
+ .parent = &ckih_clk,
+ .get_rate = get_spll_clk,
+ .enable = _clk_spll_enable,
+ .disable = _clk_spll_disable,
+};
+
+static unsigned long get_hclk_clk(struct clk *clk)
+{
+ unsigned long rate;
+ unsigned long bclk_pdf;
+
+ bclk_pdf = (CSCR() & CCM_CSCR_BCLK_MASK)
+ >> CCM_CSCR_BCLK_OFFSET;
+
+ rate = clk_get_rate(clk->parent);
+ return rate / (bclk_pdf + 1);
+}
+
+static struct clk hclk_clk = {
+ .parent = &fclk_clk,
+ .get_rate = get_hclk_clk,
+};
+
+static unsigned long get_ipg_clk(struct clk *clk)
+{
+ unsigned long rate;
+ unsigned long ipg_pdf;
+
+ ipg_pdf = (CSCR() & CCM_CSCR_IPDIV) >> CCM_CSCR_IPDIV_OFFSET;
+
+ rate = clk_get_rate(clk->parent);
+ return rate / (ipg_pdf + 1);
+}
+
+static struct clk ipg_clk = {
+ .parent = &hclk_clk,
+ .get_rate = get_ipg_clk,
+};
+
+static unsigned long _clk_perclkx_recalc(struct clk *clk)
+{
+ unsigned long perclk_pdf;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ if (clk->id < 0 || clk->id > 3)
+ return 0;
+
+ perclk_pdf = (PCDR1() >> (clk->id << 3)) & CCM_PCDR1_PERDIV1_MASK;
+
+ return parent_rate / (perclk_pdf + 1);
+}
+
+static struct clk per_clk[] = {
+ {
+ .id = 0,
+ .parent = &mpll_clk,
+ .get_rate = _clk_perclkx_recalc,
+ }, {
+ .id = 1,
+ .parent = &mpll_clk,
+ .get_rate = _clk_perclkx_recalc,
+ }, {
+ .id = 2,
+ .parent = &mpll_clk,
+ .round_rate = _clk_perclkx_round_rate,
+ .set_rate = _clk_perclkx_set_rate,
+ .get_rate = _clk_perclkx_recalc,
+ /* Enable/Disable done via lcd_clkc[1] */
+ }, {
+ .id = 3,
+ .parent = &mpll_clk,
+ .round_rate = _clk_perclkx_round_rate,
+ .set_rate = _clk_perclkx_set_rate,
+ .get_rate = _clk_perclkx_recalc,
+ /* Enable/Disable done via csi_clk[1] */
+ },
+};
+
+static struct clk uart_ipg_clk[];
+
+static struct clk uart_clk[] = {
+ {
+ .id = 0,
+ .parent = &per_clk[0],
+ .secondary = &uart_ipg_clk[0],
+ }, {
+ .id = 1,
+ .parent = &per_clk[0],
+ .secondary = &uart_ipg_clk[1],
+ }, {
+ .id = 2,
+ .parent = &per_clk[0],
+ .secondary = &uart_ipg_clk[2],
+ }, {
+ .id = 3,
+ .parent = &per_clk[0],
+ .secondary = &uart_ipg_clk[3],
+ },
+};
+
+static struct clk uart_ipg_clk[] = {
+ {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_UART1_REG,
+ .enable_shift = CCM_PCCR_UART1_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_UART2_REG,
+ .enable_shift = CCM_PCCR_UART2_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 2,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_UART3_REG,
+ .enable_shift = CCM_PCCR_UART3_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 3,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_UART4_REG,
+ .enable_shift = CCM_PCCR_UART4_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk gpt_ipg_clk[];
+
+static struct clk gpt_clk[] = {
+ {
+ .id = 0,
+ .parent = &per_clk[0],
+ .secondary = &gpt_ipg_clk[0],
+ }, {
+ .id = 1,
+ .parent = &per_clk[0],
+ .secondary = &gpt_ipg_clk[1],
+ }, {
+ .id = 2,
+ .parent = &per_clk[0],
+ .secondary = &gpt_ipg_clk[2],
+ },
+};
+
+static struct clk gpt_ipg_clk[] = {
+ {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_GPT1_REG,
+ .enable_shift = CCM_PCCR_GPT1_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_GPT2_REG,
+ .enable_shift = CCM_PCCR_GPT2_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 2,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_GPT3_REG,
+ .enable_shift = CCM_PCCR_GPT3_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk pwm_clk[] = {
+ {
+ .parent = &per_clk[0],
+ .secondary = &pwm_clk[1],
+ }, {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_PWM_REG,
+ .enable_shift = CCM_PCCR_PWM_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk sdhc_ipg_clk[];
+
+static struct clk sdhc_clk[] = {
+ {
+ .id = 0,
+ .parent = &per_clk[1],
+ .secondary = &sdhc_ipg_clk[0],
+ }, {
+ .id = 1,
+ .parent = &per_clk[1],
+ .secondary = &sdhc_ipg_clk[1],
+ },
+};
+
+static struct clk sdhc_ipg_clk[] = {
+ {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SDHC1_REG,
+ .enable_shift = CCM_PCCR_SDHC1_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SDHC2_REG,
+ .enable_shift = CCM_PCCR_SDHC2_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk cspi_ipg_clk[];
+
+static struct clk cspi_clk[] = {
+ {
+ .id = 0,
+ .parent = &per_clk[1],
+ .secondary = &cspi_ipg_clk[0],
+ }, {
+ .id = 1,
+ .parent = &per_clk[1],
+ .secondary = &cspi_ipg_clk[1],
+ }, {
+ .id = 2,
+ .parent = &per_clk[1],
+ .secondary = &cspi_ipg_clk[2],
+ },
+};
+
+static struct clk cspi_ipg_clk[] = {
+ {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_CSPI1_REG,
+ .enable_shift = CCM_PCCR_CSPI1_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_CSPI2_REG,
+ .enable_shift = CCM_PCCR_CSPI2_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 3,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_CSPI3_REG,
+ .enable_shift = CCM_PCCR_CSPI3_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk lcdc_clk[] = {
+ {
+ .parent = &per_clk[2],
+ .secondary = &lcdc_clk[1],
+ .round_rate = _clk_parent_round_rate,
+ .set_rate = _clk_parent_set_rate,
+ }, {
+ .parent = &ipg_clk,
+ .secondary = &lcdc_clk[2],
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_LCDC_REG,
+ .enable_shift = CCM_PCCR_LCDC_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_LCDC_REG,
+ .enable_shift = CCM_PCCR_HCLK_LCDC_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk csi_clk[] = {
+ {
+ .parent = &per_clk[3],
+ .secondary = &csi_clk[1],
+ .round_rate = _clk_parent_round_rate,
+ .set_rate = _clk_parent_set_rate,
+ }, {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_CSI_REG,
+ .enable_shift = CCM_PCCR_HCLK_CSI_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk usb_clk[] = {
+ {
+ .parent = &spll_clk,
+ .get_rate = _clk_usb_recalc,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_USBOTG_REG,
+ .enable_shift = CCM_PCCR_USBOTG_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_USBOTG_REG,
+ .enable_shift = CCM_PCCR_HCLK_USBOTG_OFFSET,
+ .disable = _clk_disable,
+ }
+};
+
+static struct clk ssi_ipg_clk[];
+
+static struct clk ssi_clk[] = {
+ {
+ .id = 0,
+ .parent = &mpll_clk,
+ .secondary = &ssi_ipg_clk[0],
+ .get_rate = _clk_ssi1_recalc,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SSI1_BAUD_REG,
+ .enable_shift = CCM_PCCR_SSI1_BAUD_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &mpll_clk,
+ .secondary = &ssi_ipg_clk[1],
+ .get_rate = _clk_ssi2_recalc,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SSI2_BAUD_REG,
+ .enable_shift = CCM_PCCR_SSI2_BAUD_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk ssi_ipg_clk[] = {
+ {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SSI1_REG,
+ .enable_shift = CCM_PCCR_SSI1_IPG_OFFSET,
+ .disable = _clk_disable,
+ }, {
+ .id = 1,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SSI2_REG,
+ .enable_shift = CCM_PCCR_SSI2_IPG_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+
+static struct clk nfc_clk = {
+ .parent = &fclk_clk,
+ .get_rate = _clk_nfc_recalc,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_NFC_REG,
+ .enable_shift = CCM_PCCR_NFC_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk dma_clk[] = {
+ {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_DMA_REG,
+ .enable_shift = CCM_PCCR_DMA_OFFSET,
+ .disable = _clk_disable,
+ .secondary = &dma_clk[1],
+ }, {
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_DMA_REG,
+ .enable_shift = CCM_PCCR_HCLK_DMA_OFFSET,
+ .disable = _clk_disable,
+ },
+};
+
+static struct clk brom_clk = {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_BROM_REG,
+ .enable_shift = CCM_PCCR_HCLK_BROM_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk emma_clk[] = {
+ {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_EMMA_REG,
+ .enable_shift = CCM_PCCR_EMMA_OFFSET,
+ .disable = _clk_disable,
+ .secondary = &emma_clk[1],
+ }, {
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_EMMA_REG,
+ .enable_shift = CCM_PCCR_HCLK_EMMA_OFFSET,
+ .disable = _clk_disable,
+ }
+};
+
+static struct clk slcdc_clk[] = {
+ {
+ .parent = &hclk_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_SLCDC_REG,
+ .enable_shift = CCM_PCCR_SLCDC_OFFSET,
+ .disable = _clk_disable,
+ .secondary = &slcdc_clk[1],
+ }, {
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_HCLK_SLCDC_REG,
+ .enable_shift = CCM_PCCR_HCLK_SLCDC_OFFSET,
+ .disable = _clk_disable,
+ }
+};
+
+static struct clk wdog_clk = {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_WDT_REG,
+ .enable_shift = CCM_PCCR_WDT_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk gpio_clk = {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_GPIO_REG,
+ .enable_shift = CCM_PCCR_GPIO_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk i2c_clk = {
+ .id = 0,
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_I2C1_REG,
+ .enable_shift = CCM_PCCR_I2C1_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk kpp_clk = {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_KPP_REG,
+ .enable_shift = CCM_PCCR_KPP_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk owire_clk = {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_OWIRE_REG,
+ .enable_shift = CCM_PCCR_OWIRE_OFFSET,
+ .disable = _clk_disable,
+};
+
+static struct clk rtc_clk = {
+ .parent = &ipg_clk,
+ .enable = _clk_enable,
+ .enable_reg = CCM_PCCR_RTC_REG,
+ .enable_shift = CCM_PCCR_RTC_OFFSET,
+ .disable = _clk_disable,
+};
+
+static unsigned long _clk_clko_round_rate(struct clk *clk, unsigned long rate)
+{
+ u32 div;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+ div = parent_rate / rate;
+ if (parent_rate % rate)
+ div++;
+
+ if (div > 8)
+ div = 8;
+
+ return parent_rate / div;
+}
+
+static int _clk_clko_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 reg;
+ u32 div;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ div = parent_rate / rate;
+
+ if (div > 8 || div < 1 || ((parent_rate / div) != rate))
+ return -EINVAL;
+ div--;
+
+ reg = __raw_readl(CCM_PCDR0);
+
+ if (clk->parent == &usb_clk[0]) {
+ reg &= ~CCM_PCDR0_48MDIV_MASK;
+ reg |= div << CCM_PCDR0_48MDIV_OFFSET;
+ }
+ __raw_writel(reg, CCM_PCDR0);
+
+ return 0;
+}
+
+static unsigned long _clk_clko_recalc(struct clk *clk)
+{
+ u32 div = 0;
+ unsigned long parent_rate;
+
+ parent_rate = clk_get_rate(clk->parent);
+
+ if (clk->parent == &usb_clk[0]) /* 48M */
+ div = __raw_readl(CCM_PCDR0) & CCM_PCDR0_48MDIV_MASK
+ >> CCM_PCDR0_48MDIV_OFFSET;
+ div++;
+
+ return parent_rate / div;
+}
+
+static struct clk clko_clk;
+
+static int _clk_clko_set_parent(struct clk *clk, struct clk *parent)
+{
+ u32 reg;
+
+ reg = __raw_readl(CCM_CCSR) & ~CCM_CCSR_CLKOSEL_MASK;
+
+ if (parent == &ckil_clk)
+ reg |= 0 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &fpm_clk)
+ reg |= 1 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &ckih_clk)
+ reg |= 2 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == mpll_clk.parent)
+ reg |= 3 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == spll_clk.parent)
+ reg |= 4 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &mpll_clk)
+ reg |= 5 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &spll_clk)
+ reg |= 6 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &fclk_clk)
+ reg |= 7 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &hclk_clk)
+ reg |= 8 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &ipg_clk)
+ reg |= 9 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &per_clk[0])
+ reg |= 0xA << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &per_clk[1])
+ reg |= 0xB << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &per_clk[2])
+ reg |= 0xC << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &per_clk[3])
+ reg |= 0xD << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &ssi_clk[0])
+ reg |= 0xE << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &ssi_clk[1])
+ reg |= 0xF << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &nfc_clk)
+ reg |= 0x10 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &usb_clk[0])
+ reg |= 0x14 << CCM_CCSR_CLKOSEL_OFFSET;
+ else if (parent == &clko_clk)
+ reg |= 0x15 << CCM_CCSR_CLKOSEL_OFFSET;
+ else
+ return -EINVAL;
+
+ __raw_writel(reg, CCM_CCSR);
+
+ return 0;
+}
+
+static struct clk clko_clk = {
+ .get_rate = _clk_clko_recalc,
+ .set_rate = _clk_clko_set_rate,
+ .round_rate = _clk_clko_round_rate,
+ .set_parent = _clk_clko_set_parent,
+};
+
+
+#define _REGISTER_CLOCK(d, n, c) \
+ { \
+ .dev_id = d, \
+ .con_id = n, \
+ .clk = &c, \
+ },
+static struct clk_lookup lookups[] __initdata = {
+/* It's unlikely that any driver wants one of them directly:
+ _REGISTER_CLOCK(NULL, "ckih", ckih_clk)
+ _REGISTER_CLOCK(NULL, "ckil", ckil_clk)
+ _REGISTER_CLOCK(NULL, "fpm", fpm_clk)
+ _REGISTER_CLOCK(NULL, "mpll", mpll_clk)
+ _REGISTER_CLOCK(NULL, "spll", spll_clk)
+ _REGISTER_CLOCK(NULL, "fclk", fclk_clk)
+ _REGISTER_CLOCK(NULL, "hclk", hclk_clk)
+ _REGISTER_CLOCK(NULL, "ipg", ipg_clk)
+*/
+ _REGISTER_CLOCK(NULL, "perclk1", per_clk[0])
+ _REGISTER_CLOCK(NULL, "perclk2", per_clk[1])
+ _REGISTER_CLOCK(NULL, "perclk3", per_clk[2])
+ _REGISTER_CLOCK(NULL, "perclk4", per_clk[3])
+ _REGISTER_CLOCK(NULL, "clko", clko_clk)
+ _REGISTER_CLOCK("imx-uart.0", NULL, uart_clk[0])
+ _REGISTER_CLOCK("imx-uart.1", NULL, uart_clk[1])
+ _REGISTER_CLOCK("imx-uart.2", NULL, uart_clk[2])
+ _REGISTER_CLOCK("imx-uart.3", NULL, uart_clk[3])
+ _REGISTER_CLOCK(NULL, "gpt1", gpt_clk[0])
+ _REGISTER_CLOCK(NULL, "gpt1", gpt_clk[1])
+ _REGISTER_CLOCK(NULL, "gpt1", gpt_clk[2])
+ _REGISTER_CLOCK(NULL, "pwm", pwm_clk[0])
+ _REGISTER_CLOCK(NULL, "sdhc1", sdhc_clk[0])
+ _REGISTER_CLOCK(NULL, "sdhc2", sdhc_clk[1])
+ _REGISTER_CLOCK(NULL, "cspi1", cspi_clk[0])
+ _REGISTER_CLOCK(NULL, "cspi2", cspi_clk[1])
+ _REGISTER_CLOCK(NULL, "cspi3", cspi_clk[2])
+ _REGISTER_CLOCK(NULL, "lcdc", lcdc_clk[0])
+ _REGISTER_CLOCK(NULL, "csi", csi_clk[0])
+ _REGISTER_CLOCK(NULL, "usb", usb_clk[0])
+ _REGISTER_CLOCK(NULL, "ssi1", ssi_clk[0])
+ _REGISTER_CLOCK(NULL, "ssi2", ssi_clk[1])
+ _REGISTER_CLOCK(NULL, "nfc", nfc_clk)
+ _REGISTER_CLOCK(NULL, "dma", dma_clk[0])
+ _REGISTER_CLOCK(NULL, "brom", brom_clk)
+ _REGISTER_CLOCK(NULL, "emma", emma_clk[0])
+ _REGISTER_CLOCK(NULL, "slcdc", slcdc_clk[0])
+ _REGISTER_CLOCK(NULL, "wdog", wdog_clk)
+ _REGISTER_CLOCK(NULL, "gpio", gpio_clk)
+ _REGISTER_CLOCK(NULL, "i2c", i2c_clk)
+ _REGISTER_CLOCK("mxc-keypad", NULL, kpp_clk)
+ _REGISTER_CLOCK(NULL, "owire", owire_clk)
+ _REGISTER_CLOCK(NULL, "rtc", rtc_clk)
+};
+
+/*
+ * must be called very early to get information about the
+ * available clock rate when the timer framework starts
+ */
+int __init mx21_clocks_init(unsigned long lref, unsigned long href)
+{
+ int i;
+ u32 cscr;
+
+ external_low_reference = lref;
+ external_high_reference = href;
+
+ /* detect clock reference for both system PLL */
+ cscr = CSCR();
+ if (cscr & CCM_CSCR_MCU)
+ mpll_clk.parent = &ckih_clk;
+ else
+ mpll_clk.parent = &fpm_clk;
+
+ if (cscr & CCM_CSCR_SP)
+ spll_clk.parent = &ckih_clk;
+ else
+ spll_clk.parent = &fpm_clk;
+
+ for (i = 0; i < ARRAY_SIZE(lookups); i++)
+ clkdev_add(&lookups[i]);
+
+ /* Turn off all clock gates */
+ __raw_writel(0, CCM_PCCR0);
+ __raw_writel(CCM_PCCR_GPT1_MASK, CCM_PCCR1);
+
+ /* This turns of the serial PLL as well */
+ spll_clk.disable(&spll_clk);
+
+ /* This will propagate to all children and init all the clock rates. */
+ clk_enable(&per_clk[0]);
+ clk_enable(&gpio_clk);
+
+#ifdef CONFIG_DEBUG_LL_CONSOLE
+ clk_enable(&uart_clk[0]);
+#endif
+
+ mxc_timer_init(&gpt_clk[0]);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-13 20:03:32 +0000