imx/mx3: rename clock.c and iomux.c to {clock,iomux}-imx31.c

These files are only used on imx31.  This makes the name consistent with
the imx35 files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Valentin Longchamp <valentin.longchamp@epfl.ch>

1 files changed, 632 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/clock-imx31.c b/arch/arm/mach-mx3/clock-imx31.c
new file mode 100644
index 000000000000..cc03a61116e2
--- /dev/null
+++ b/arch/arm/mach-mx3/clock-imx31.c
@@ -0,0 +1,632 @@
+/*
+ * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ *
+ * 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/module.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <asm/clkdev.h>
+#include <asm/div64.h>
+
+#include <mach/clock.h>
+#include <mach/hardware.h>
+#include <mach/mx31.h>
+#include <mach/common.h>
+
+#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 serial_pll_clk;
+static struct clk ipg_clk;
+static struct clk ckih_clk;
+
+static int cgr_enable(struct clk *clk)
+{
+        u32 reg;
+
+        if (!clk->enable_reg)
+                return 0;
+
+        reg = __raw_readl(clk->enable_reg);
+        reg |= 3 << clk->enable_shift;
+        __raw_writel(reg, clk->enable_reg);
+
+        return 0;
+}
+
+static void cgr_disable(struct clk *clk)
+{
+        u32 reg;
+
+        if (!clk->enable_reg)
+                return;
+
+        reg = __raw_readl(clk->enable_reg);
+        reg &= ~(3 << clk->enable_shift);
+
+        /* special case for EMI clock */
+        if (clk->enable_reg == MXC_CCM_CGR2 && clk->enable_shift == 8)
+                reg |= (1 << clk->enable_shift);
+
+        __raw_writel(reg, clk->enable_reg);
+}
+
+static unsigned long pll_ref_get_rate(void)
+{
+        unsigned long ccmr;
+        unsigned int prcs;
+
+        ccmr = __raw_readl(MXC_CCM_CCMR);
+        prcs = (ccmr & MXC_CCM_CCMR_PRCS_MASK) >> MXC_CCM_CCMR_PRCS_OFFSET;
+        if (prcs == 0x1)
+                return CKIL_CLK_FREQ * 1024;
+        else
+                return clk_get_rate(&ckih_clk);
+}
+
+static unsigned long usb_pll_get_rate(struct clk *clk)
+{
+        unsigned long reg;
+
+        reg = __raw_readl(MXC_CCM_UPCTL);
+
+        return mxc_decode_pll(reg, pll_ref_get_rate());
+}
+
+static unsigned long serial_pll_get_rate(struct clk *clk)
+{
+        unsigned long reg;
+
+        reg = __raw_readl(MXC_CCM_SRPCTL);
+
+        return mxc_decode_pll(reg, pll_ref_get_rate());
+}
+
+static unsigned long mcu_pll_get_rate(struct clk *clk)
+{
+        unsigned long reg, ccmr;
+
+        ccmr = __raw_readl(MXC_CCM_CCMR);
+
+        if (!(ccmr & MXC_CCM_CCMR_MPE) || (ccmr & MXC_CCM_CCMR_MDS))
+                return clk_get_rate(&ckih_clk);
+
+        reg = __raw_readl(MXC_CCM_MPCTL);
+
+        return mxc_decode_pll(reg, pll_ref_get_rate());
+}
+
+static int 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 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 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 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 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 ahb_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 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 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 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 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 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 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 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 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 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 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 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 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 mbx_get_rate(struct clk *clk)
+{
+        return clk_get_rate(clk->parent) / 2;
+}
+
+static unsigned long 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 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 unsigned long clk_ckil_get_rate(struct clk *clk)
+{
+        return CKIL_CLK_FREQ;
+}
+
+static struct clk ckih_clk = {
+        .get_rate = clk_ckih_get_rate,
+};
+
+static struct clk mcu_pll_clk = {
+        .parent = &ckih_clk,
+        .get_rate = mcu_pll_get_rate,
+};
+
+static struct clk mcu_main_clk = {
+        .parent = &mcu_pll_clk,
+        .get_rate = mcu_main_get_rate,
+};
+
+static struct clk serial_pll_clk = {
+        .parent = &ckih_clk,
+        .get_rate = serial_pll_get_rate,
+        .enable = serial_pll_enable,
+        .disable = serial_pll_disable,
+};
+
+static struct clk usb_pll_clk = {
+        .parent = &ckih_clk,
+        .get_rate = usb_pll_get_rate,
+        .enable = usb_pll_enable,
+        .disable = usb_pll_disable,
+};
+
+static struct clk ahb_clk = {
+        .parent = &mcu_main_clk,
+        .get_rate = ahb_get_rate,
+};
+
+#define DEFINE_CLOCK(name, i, er, es, gr, s, p)         \
+        static struct clk name = {                      \
+                .id             = i,                    \
+                .enable_reg     = er,                   \
+                .enable_shift   = es,                   \
+                .get_rate       = gr,                   \
+                .enable         = cgr_enable,           \
+                .disable        = cgr_disable,          \
+                .secondary      = s,                    \
+                .parent         = p,                    \
+        }
+
+#define DEFINE_CLOCK1(name, i, er, es, getsetround, s, p)       \
+        static struct clk name = {                              \
+                .id             = i,                            \
+                .enable_reg     = er,                           \
+                .enable_shift   = es,                           \
+                .get_rate       = getsetround##_get_rate,       \
+                .set_rate       = getsetround##_set_rate,       \
+                .round_rate     = getsetround##_round_rate,     \
+                .enable         = cgr_enable,                   \
+                .disable        = cgr_disable,                  \
+                .secondary      = s,                            \
+                .parent         = p,                            \
+        }
+
+DEFINE_CLOCK(perclk_clk,  0, NULL,          0, NULL, NULL, &ipg_clk);
+
+DEFINE_CLOCK(sdhc1_clk,   0, MXC_CCM_CGR0,  0, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(sdhc2_clk,   1, MXC_CCM_CGR0,  2, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(gpt_clk,     0, MXC_CCM_CGR0,  4, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(epit1_clk,   0, MXC_CCM_CGR0,  6, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(epit2_clk,   1, MXC_CCM_CGR0,  8, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(iim_clk,     0, MXC_CCM_CGR0, 10, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(ata_clk,     0, MXC_CCM_CGR0, 12, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(sdma_clk1,   0, MXC_CCM_CGR0, 14, NULL, &sdma_clk1, &ahb_clk);
+DEFINE_CLOCK(cspi3_clk,   2, MXC_CCM_CGR0, 16, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(rng_clk,     0, MXC_CCM_CGR0, 18, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(uart1_clk,   0, MXC_CCM_CGR0, 20, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(uart2_clk,   1, MXC_CCM_CGR0, 22, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(ssi1_clk,    0, MXC_CCM_CGR0, 24, ssi1_get_rate, NULL, &serial_pll_clk);
+DEFINE_CLOCK(i2c1_clk,    0, MXC_CCM_CGR0, 26, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(i2c2_clk,    1, MXC_CCM_CGR0, 28, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(i2c3_clk,    2, MXC_CCM_CGR0, 30, NULL, NULL, &perclk_clk);
+
+DEFINE_CLOCK(mpeg4_clk,   0, MXC_CCM_CGR1,  0, NULL, NULL, &ahb_clk);
+DEFINE_CLOCK(mstick1_clk, 0, MXC_CCM_CGR1,  2, mstick1_get_rate, NULL, &usb_pll_clk);
+DEFINE_CLOCK(mstick2_clk, 1, MXC_CCM_CGR1,  4, mstick2_get_rate, NULL, &usb_pll_clk);
+DEFINE_CLOCK1(csi_clk,    0, MXC_CCM_CGR1,  6, csi, NULL, &serial_pll_clk);
+DEFINE_CLOCK(rtc_clk,     0, MXC_CCM_CGR1,  8, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(wdog_clk,    0, MXC_CCM_CGR1, 10, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(pwm_clk,     0, MXC_CCM_CGR1, 12, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(usb_clk2,    0, MXC_CCM_CGR1, 18, usb_get_rate, NULL, &ahb_clk);
+DEFINE_CLOCK(kpp_clk,     0, MXC_CCM_CGR1, 20, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(ipu_clk,     0, MXC_CCM_CGR1, 22, hsp_get_rate, NULL, &mcu_main_clk);
+DEFINE_CLOCK(uart3_clk,   2, MXC_CCM_CGR1, 24, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(uart4_clk,   3, MXC_CCM_CGR1, 26, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(uart5_clk,   4, MXC_CCM_CGR1, 28, NULL, NULL, &perclk_clk);
+DEFINE_CLOCK(owire_clk,   0, MXC_CCM_CGR1, 30, NULL, NULL, &perclk_clk);
+
+DEFINE_CLOCK(ssi2_clk,    1, MXC_CCM_CGR2,  0, ssi2_get_rate, NULL, &serial_pll_clk);
+DEFINE_CLOCK(cspi1_clk,   0, MXC_CCM_CGR2,  2, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(cspi2_clk,   1, MXC_CCM_CGR2,  4, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(mbx_clk,     0, MXC_CCM_CGR2,  6, mbx_get_rate, NULL, &ahb_clk);
+DEFINE_CLOCK(emi_clk,     0, MXC_CCM_CGR2,  8, NULL, NULL, &ahb_clk);
+DEFINE_CLOCK(rtic_clk,    0, MXC_CCM_CGR2, 10, NULL, NULL, &ahb_clk);
+DEFINE_CLOCK1(firi_clk,   0, MXC_CCM_CGR2, 12, firi, NULL, &usb_pll_clk);
+
+DEFINE_CLOCK(sdma_clk2,   0, NULL,          0, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(usb_clk1,    0, NULL,          0, usb_get_rate, NULL, &usb_pll_clk);
+DEFINE_CLOCK(nfc_clk,     0, NULL,          0, nfc_get_rate, NULL, &ahb_clk);
+DEFINE_CLOCK(scc_clk,     0, NULL,          0, NULL, NULL, &ipg_clk);
+DEFINE_CLOCK(ipg_clk,     0, NULL,          0, ipg_get_rate, NULL, &ahb_clk);
+DEFINE_CLOCK(ckil_clk,    0, NULL,          0, clk_ckil_get_rate, NULL, NULL);
+
+#define _REGISTER_CLOCK(d, n, c) \
+        { \
+                .dev_id = d, \
+                .con_id = n, \
+                .clk = &c, \
+        },
+
+static struct clk_lookup lookups[] = {
+        _REGISTER_CLOCK(NULL, "emi", emi_clk)
+        _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk)
+        _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk)
+        _REGISTER_CLOCK("spi_imx.2", NULL, cspi3_clk)
+        _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
+        _REGISTER_CLOCK(NULL, "pwm", pwm_clk)
+        _REGISTER_CLOCK("imx-wdt.0", NULL, wdog_clk)
+        _REGISTER_CLOCK(NULL, "rtc", rtc_clk)
+        _REGISTER_CLOCK(NULL, "epit", epit1_clk)
+        _REGISTER_CLOCK(NULL, "epit", epit2_clk)
+        _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk)
+        _REGISTER_CLOCK("ipu-core", NULL, ipu_clk)
+        _REGISTER_CLOCK("mx3_sdc_fb", NULL, ipu_clk)
+        _REGISTER_CLOCK(NULL, "kpp", kpp_clk)
+        _REGISTER_CLOCK("mxc-ehci.0", "usb", usb_clk1)
+        _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", usb_clk2)
+        _REGISTER_CLOCK("mxc-ehci.1", "usb", usb_clk1)
+        _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", usb_clk2)
+        _REGISTER_CLOCK("mxc-ehci.2", "usb", usb_clk1)
+        _REGISTER_CLOCK("mxc-ehci.2", "usb_ahb", usb_clk2)
+        _REGISTER_CLOCK("fsl-usb2-udc", "usb", usb_clk1)
+        _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", usb_clk2)
+        _REGISTER_CLOCK("mx3-camera.0", NULL, csi_clk)
+        _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
+        _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
+        _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
+        _REGISTER_CLOCK("imx-uart.3", NULL, uart4_clk)
+        _REGISTER_CLOCK("imx-uart.4", NULL, uart5_clk)
+        _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
+        _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
+        _REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_clk)
+        _REGISTER_CLOCK("mxc_w1.0", NULL, owire_clk)
+        _REGISTER_CLOCK("mxc-mmc.0", NULL, sdhc1_clk)
+        _REGISTER_CLOCK("mxc-mmc.1", NULL, sdhc2_clk)
+        _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
+        _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
+        _REGISTER_CLOCK(NULL, "firi", firi_clk)
+        _REGISTER_CLOCK(NULL, "ata", ata_clk)
+        _REGISTER_CLOCK(NULL, "rtic", rtic_clk)
+        _REGISTER_CLOCK(NULL, "rng", rng_clk)
+        _REGISTER_CLOCK(NULL, "sdma_ahb", sdma_clk1)
+        _REGISTER_CLOCK(NULL, "sdma_ipg", sdma_clk2)
+        _REGISTER_CLOCK(NULL, "mstick", mstick1_clk)
+        _REGISTER_CLOCK(NULL, "mstick", mstick2_clk)
+        _REGISTER_CLOCK(NULL, "scc", scc_clk)
+        _REGISTER_CLOCK(NULL, "iim", iim_clk)
+        _REGISTER_CLOCK(NULL, "mpeg4", mpeg4_clk)
+        _REGISTER_CLOCK(NULL, "mbx", mbx_clk)
+        _REGISTER_CLOCK("mxc_rtc", NULL, ckil_clk)
+};
+
+int __init mx31_clocks_init(unsigned long fref)
+{
+        u32 reg;
+        int i;
+
+        ckih_rate = fref;
+
+        for (i = 0; i < ARRAY_SIZE(lookups); i++)
+                clkdev_add(&lookups[i]);
+
+        /* change the csi_clk parent if necessary */
+        reg = __raw_readl(MXC_CCM_CCMR);
+        if (!(reg & MXC_CCM_CCMR_CSCS))
+                if (clk_set_parent(&csi_clk, &usb_pll_clk))
+                        pr_err("%s: error changing csi_clk parent\n", __func__);
+
+
+        /* Turn off all possible clocks */
+        __raw_writel((3 << 4), MXC_CCM_CGR0);
+        __raw_writel(0, MXC_CCM_CGR1);
+        __raw_writel((3 << 8) | (3 << 14) | (3 << 16)|
+                     1 << 27 | 1 << 28, /* Bit 27 and 28 are not defined for
+                                           MX32, but still required to be set */
+                     MXC_CCM_CGR2);
+
+        /*
+         * Before turning off usb_pll make sure ipg_per_clk is generated
+         * by ipg_clk and not usb_pll.
+         */
+        __raw_writel(__raw_readl(MXC_CCM_CCMR) | (1 << 24), MXC_CCM_CCMR);
+
+        usb_pll_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);
+
+        mx31_read_cpu_rev();
+
+        if (mx31_revision() >= MX31_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);
+        }
+
+        mxc_timer_init(&ipg_clk, IO_ADDRESS(MX31_GPT1_BASE_ADDR), MX31_INT_GPT);
+
+        return 0;
+}
+