Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

10 files changed, 1819 insertions, 0 deletions

diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig
new file mode 100644
index 00000000000..1576d51e676
--- /dev/null
+++ b/arch/arm/mach-mx5/Kconfig
@@ -0,0 +1,18 @@
+if ARCH_MX5
+
+config ARCH_MX51
+	bool
+	default y
+	select MXC_TZIC
+	select ARCH_MXC_IOMUX_V3
+
+comment "MX5 platforms:"
+
+config MACH_MX51_BABBAGE
+	bool "Support MX51 BABBAGE platforms"
+	help
+	  Include support for MX51 Babbage platform, also known as MX51EVK in
+	  u-boot. This includes specific configurations for the board and its
+	  peripherals.
+
+endif
diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile
new file mode 100644
index 00000000000..bf23f869ef5
--- /dev/null
+++ b/arch/arm/mach-mx5/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+obj-y   := cpu.o mm.o clock-mx51.o devices.o
+
+obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o
+
diff --git a/arch/arm/mach-mx5/Makefile.boot b/arch/arm/mach-mx5/Makefile.boot
new file mode 100644
index 00000000000..9939a19d99a
--- /dev/null
+++ b/arch/arm/mach-mx5/Makefile.boot
@@ -0,0 +1,3 @@
+   zreladdr-y	:= 0x90008000
+params_phys-y	:= 0x90000100
+initrd_phys-y	:= 0x90800000
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
new file mode 100644
index 00000000000..ee67a71db80
--- /dev/null
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <mach/common.h>
+#include <mach/hardware.h>
+#include <mach/imx-uart.h>
+#include <mach/iomux-mx51.h>
+
+#include <asm/irq.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include "devices.h"
+
+static struct platform_device *devices[] __initdata = {
+	&mxc_fec_device,
+};
+
+static struct pad_desc mx51babbage_pads[] = {
+	/* UART1 */
+	MX51_PAD_UART1_RXD__UART1_RXD,
+	MX51_PAD_UART1_TXD__UART1_TXD,
+	MX51_PAD_UART1_RTS__UART1_RTS,
+	MX51_PAD_UART1_CTS__UART1_CTS,
+
+	/* UART2 */
+	MX51_PAD_UART2_RXD__UART2_RXD,
+	MX51_PAD_UART2_TXD__UART2_TXD,
+
+	/* UART3 */
+	MX51_PAD_EIM_D25__UART3_RXD,
+	MX51_PAD_EIM_D26__UART3_TXD,
+	MX51_PAD_EIM_D27__UART3_RTS,
+	MX51_PAD_EIM_D24__UART3_CTS,
+};
+
+/* Serial ports */
+#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
+static struct imxuart_platform_data uart_pdata = {
+	.flags = IMXUART_HAVE_RTSCTS,
+};
+
+static inline void mxc_init_imx_uart(void)
+{
+	mxc_register_device(&mxc_uart_device0, &uart_pdata);
+	mxc_register_device(&mxc_uart_device1, &uart_pdata);
+	mxc_register_device(&mxc_uart_device2, &uart_pdata);
+}
+#else /* !SERIAL_IMX */
+static inline void mxc_init_imx_uart(void)
+{
+}
+#endif /* SERIAL_IMX */
+
+/*
+ * Board specific initialization.
+ */
+static void __init mxc_board_init(void)
+{
+	mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
+					ARRAY_SIZE(mx51babbage_pads));
+	mxc_init_imx_uart();
+	platform_add_devices(devices, ARRAY_SIZE(devices));
+}
+
+static void __init mx51_babbage_timer_init(void)
+{
+	mx51_clocks_init(32768, 24000000, 22579200, 0);
+}
+
+static struct sys_timer mxc_timer = {
+	.init	= mx51_babbage_timer_init,
+};
+
+MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
+	/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
+	.phys_io = MX51_AIPS1_BASE_ADDR,
+	.io_pg_offst = ((MX51_AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
+	.boot_params = PHYS_OFFSET + 0x100,
+	.map_io = mx51_map_io,
+	.init_irq = mx51_init_irq,
+	.init_machine = mxc_board_init,
+	.timer = &mxc_timer,
+MACHINE_END
diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c
new file mode 100644
index 00000000000..8f85f73b83a
--- /dev/null
+++ b/arch/arm/mach-mx5/clock-mx51.c
@@ -0,0 +1,825 @@
+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <asm/clkdev.h>
+
+#include <mach/hardware.h>
+#include <mach/common.h>
+#include <mach/clock.h>
+
+#include "crm_regs.h"
+
+/* External clock values passed-in by the board code */
+static unsigned long external_high_reference, external_low_reference;
+static unsigned long oscillator_reference, ckih2_reference;
+
+static struct clk osc_clk;
+static struct clk pll1_main_clk;
+static struct clk pll1_sw_clk;
+static struct clk pll2_sw_clk;
+static struct clk pll3_sw_clk;
+static struct clk lp_apm_clk;
+static struct clk periph_apm_clk;
+static struct clk ahb_clk;
+static struct clk ipg_clk;
+
+#define MAX_DPLL_WAIT_TRIES	1000 /* 1000 * udelay(1) = 1ms */
+
+static int _clk_ccgr_enable(struct clk *clk)
+{
+	u32 reg;
+
+	reg = __raw_readl(clk->enable_reg);
+	reg |= MXC_CCM_CCGRx_MOD_ON << clk->enable_shift;
+	__raw_writel(reg, clk->enable_reg);
+
+	return 0;
+}
+
+static void _clk_ccgr_disable(struct clk *clk)
+{
+	u32 reg;
+	reg = __raw_readl(clk->enable_reg);
+	reg &= ~(MXC_CCM_CCGRx_MOD_OFF << clk->enable_shift);
+	__raw_writel(reg, clk->enable_reg);
+
+}
+
+static void _clk_ccgr_disable_inwait(struct clk *clk)
+{
+	u32 reg;
+
+	reg = __raw_readl(clk->enable_reg);
+	reg &= ~(MXC_CCM_CCGRx_CG_MASK << clk->enable_shift);
+	reg |= MXC_CCM_CCGRx_MOD_IDLE << clk->enable_shift;
+	__raw_writel(reg, clk->enable_reg);
+}
+
+/*
+ * For the 4-to-1 muxed input clock
+ */
+static inline u32 _get_mux(struct clk *parent, struct clk *m0,
+			   struct clk *m1, struct clk *m2, struct clk *m3)
+{
+	if (parent == m0)
+		return 0;
+	else if (parent == m1)
+		return 1;
+	else if (parent == m2)
+		return 2;
+	else if (parent == m3)
+		return 3;
+	else
+		BUG();
+
+	return -EINVAL;
+}
+
+static inline void __iomem *_get_pll_base(struct clk *pll)
+{
+	if (pll == &pll1_main_clk)
+		return MX51_DPLL1_BASE;
+	else if (pll == &pll2_sw_clk)
+		return MX51_DPLL2_BASE;
+	else if (pll == &pll3_sw_clk)
+		return MX51_DPLL3_BASE;
+	else
+		BUG();
+
+	return NULL;
+}
+
+static unsigned long clk_pll_get_rate(struct clk *clk)
+{
+	long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
+	unsigned long dp_op, dp_mfd, dp_mfn, dp_ctl, pll_hfsm, dbl;
+	void __iomem *pllbase;
+	s64 temp;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	pllbase = _get_pll_base(clk);
+
+	dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
+	pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
+	dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
+
+	if (pll_hfsm == 0) {
+		dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
+		dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
+		dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
+	} else {
+		dp_op = __raw_readl(pllbase + MXC_PLL_DP_HFS_OP);
+		dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFD);
+		dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFN);
+	}
+	pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
+	mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
+	mfi = (mfi <= 5) ? 5 : mfi;
+	mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
+	mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
+	/* Sign extend to 32-bits */
+	if (mfn >= 0x04000000) {
+		mfn |= 0xFC000000;
+		mfn_abs = -mfn;
+	}
+
+	ref_clk = 2 * parent_rate;
+	if (dbl != 0)
+		ref_clk *= 2;
+
+	ref_clk /= (pdf + 1);
+	temp = (u64) ref_clk * mfn_abs;
+	do_div(temp, mfd + 1);
+	if (mfn < 0)
+		temp = -temp;
+	temp = (ref_clk * mfi) + temp;
+
+	return temp;
+}
+
+static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
+{
+	u32 reg;
+	void __iomem *pllbase;
+
+	long mfi, pdf, mfn, mfd = 999999;
+	s64 temp64;
+	unsigned long quad_parent_rate;
+	unsigned long pll_hfsm, dp_ctl;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	pllbase = _get_pll_base(clk);
+
+	quad_parent_rate = 4 * parent_rate;
+	pdf = mfi = -1;
+	while (++pdf < 16 && mfi < 5)
+		mfi = rate * (pdf+1) / quad_parent_rate;
+	if (mfi > 15)
+		return -EINVAL;
+	pdf--;
+
+	temp64 = rate * (pdf+1) - quad_parent_rate * mfi;
+	do_div(temp64, quad_parent_rate/1000000);
+	mfn = (long)temp64;
+
+	dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
+	/* use dpdck0_2 */
+	__raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL);
+	pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
+	if (pll_hfsm == 0) {
+		reg = mfi << 4 | pdf;
+		__raw_writel(reg, pllbase + MXC_PLL_DP_OP);
+		__raw_writel(mfd, pllbase + MXC_PLL_DP_MFD);
+		__raw_writel(mfn, pllbase + MXC_PLL_DP_MFN);
+	} else {
+		reg = mfi << 4 | pdf;
+		__raw_writel(reg, pllbase + MXC_PLL_DP_HFS_OP);
+		__raw_writel(mfd, pllbase + MXC_PLL_DP_HFS_MFD);
+		__raw_writel(mfn, pllbase + MXC_PLL_DP_HFS_MFN);
+	}
+
+	return 0;
+}
+
+static int _clk_pll_enable(struct clk *clk)
+{
+	u32 reg;
+	void __iomem *pllbase;
+	int i = 0;
+
+	pllbase = _get_pll_base(clk);
+	reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
+	__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
+
+	/* Wait for lock */
+	do {
+		reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
+		if (reg & MXC_PLL_DP_CTL_LRF)
+			break;
+
+		udelay(1);
+	} while (++i < MAX_DPLL_WAIT_TRIES);
+
+	if (i == MAX_DPLL_WAIT_TRIES) {
+		pr_err("MX5: pll locking failed\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void _clk_pll_disable(struct clk *clk)
+{
+	u32 reg;
+	void __iomem *pllbase;
+
+	pllbase = _get_pll_base(clk);
+	reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN;
+	__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
+}
+
+static int _clk_pll1_sw_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg, step;
+
+	reg = __raw_readl(MXC_CCM_CCSR);
+
+	/* When switching from pll_main_clk to a bypass clock, first select a
+	 * multiplexed clock in 'step_sel', then shift the glitchless mux
+	 * 'pll1_sw_clk_sel'.
+	 *
+	 * When switching back, do it in reverse order
+	 */
+	if (parent == &pll1_main_clk) {
+		/* Switch to pll1_main_clk */
+		reg &= ~MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
+		__raw_writel(reg, MXC_CCM_CCSR);
+		/* step_clk mux switched to lp_apm, to save power. */
+		reg = __raw_readl(MXC_CCM_CCSR);
+		reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
+		reg |= (MXC_CCM_CCSR_STEP_SEL_LP_APM <<
+				MXC_CCM_CCSR_STEP_SEL_OFFSET);
+	} else {
+		if (parent == &lp_apm_clk) {
+			step = MXC_CCM_CCSR_STEP_SEL_LP_APM;
+		} else  if (parent == &pll2_sw_clk) {
+			step = MXC_CCM_CCSR_STEP_SEL_PLL2_DIVIDED;
+		} else  if (parent == &pll3_sw_clk) {
+			step = MXC_CCM_CCSR_STEP_SEL_PLL3_DIVIDED;
+		} else
+			return -EINVAL;
+
+		reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
+		reg |= (step << MXC_CCM_CCSR_STEP_SEL_OFFSET);
+
+		__raw_writel(reg, MXC_CCM_CCSR);
+		/* Switch to step_clk */
+		reg = __raw_readl(MXC_CCM_CCSR);
+		reg |= MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
+	}
+	__raw_writel(reg, MXC_CCM_CCSR);
+	return 0;
+}
+
+static unsigned long clk_pll1_sw_get_rate(struct clk *clk)
+{
+	u32 reg, div;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	reg = __raw_readl(MXC_CCM_CCSR);
+
+	if (clk->parent == &pll2_sw_clk) {
+		div = ((reg & MXC_CCM_CCSR_PLL2_PODF_MASK) >>
+		       MXC_CCM_CCSR_PLL2_PODF_OFFSET) + 1;
+	} else if (clk->parent == &pll3_sw_clk) {
+		div = ((reg & MXC_CCM_CCSR_PLL3_PODF_MASK) >>
+		       MXC_CCM_CCSR_PLL3_PODF_OFFSET) + 1;
+	} else
+		div = 1;
+	return parent_rate / div;
+}
+
+static int _clk_pll2_sw_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg;
+
+	reg = __raw_readl(MXC_CCM_CCSR);
+
+	if (parent == &pll2_sw_clk)
+		reg &= ~MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
+	else
+		reg |= MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
+
+	__raw_writel(reg, MXC_CCM_CCSR);
+	return 0;
+}
+
+static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg;
+
+	if (parent == &osc_clk)
+		reg = __raw_readl(MXC_CCM_CCSR) & ~MXC_CCM_CCSR_LP_APM_SEL;
+	else
+		return -EINVAL;
+
+	__raw_writel(reg, MXC_CCM_CCSR);
+
+	return 0;
+}
+
+static unsigned long clk_arm_get_rate(struct clk *clk)
+{
+	u32 cacrr, div;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+	cacrr = __raw_readl(MXC_CCM_CACRR);
+	div = (cacrr & MXC_CCM_CACRR_ARM_PODF_MASK) + 1;
+
+	return parent_rate / div;
+}
+
+static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg, mux;
+	int i = 0;
+
+	mux = _get_mux(parent, &pll1_sw_clk, &pll3_sw_clk, &lp_apm_clk, NULL);
+
+	reg = __raw_readl(MXC_CCM_CBCMR) & ~MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK;
+	reg |= mux << MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET;
+	__raw_writel(reg, MXC_CCM_CBCMR);
+
+	/* Wait for lock */
+	do {
+		reg = __raw_readl(MXC_CCM_CDHIPR);
+		if (!(reg &  MXC_CCM_CDHIPR_PERIPH_CLK_SEL_BUSY))
+			break;
+
+		udelay(1);
+	} while (++i < MAX_DPLL_WAIT_TRIES);
+
+	if (i == MAX_DPLL_WAIT_TRIES) {
+		pr_err("MX5: Set parent for periph_apm clock failed\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int _clk_main_bus_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg;
+
+	reg = __raw_readl(MXC_CCM_CBCDR);
+
+	if (parent == &pll2_sw_clk)
+		reg &= ~MXC_CCM_CBCDR_PERIPH_CLK_SEL;
+	else if (parent == &periph_apm_clk)
+		reg |= MXC_CCM_CBCDR_PERIPH_CLK_SEL;
+	else
+		return -EINVAL;
+
+	__raw_writel(reg, MXC_CCM_CBCDR);
+
+	return 0;
+}
+
+static struct clk main_bus_clk = {
+	.parent = &pll2_sw_clk,
+	.set_parent = _clk_main_bus_set_parent,
+};
+
+static unsigned long clk_ahb_get_rate(struct clk *clk)
+{
+	u32 reg, div;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	reg = __raw_readl(MXC_CCM_CBCDR);
+	div = ((reg & MXC_CCM_CBCDR_AHB_PODF_MASK) >>
+	       MXC_CCM_CBCDR_AHB_PODF_OFFSET) + 1;
+	return parent_rate / div;
+}
+
+
+static int _clk_ahb_set_rate(struct clk *clk, unsigned long rate)
+{
+	u32 reg, div;
+	unsigned long parent_rate;
+	int i = 0;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	div = parent_rate / rate;
+	if (div > 8 || div < 1 || ((parent_rate / div) != rate))
+		return -EINVAL;
+
+	reg = __raw_readl(MXC_CCM_CBCDR);
+	reg &= ~MXC_CCM_CBCDR_AHB_PODF_MASK;
+	reg |= (div - 1) << MXC_CCM_CBCDR_AHB_PODF_OFFSET;
+	__raw_writel(reg, MXC_CCM_CBCDR);
+
+	/* Wait for lock */
+	do {
+		reg = __raw_readl(MXC_CCM_CDHIPR);
+		if (!(reg & MXC_CCM_CDHIPR_AHB_PODF_BUSY))
+			break;
+
+		udelay(1);
+	} while (++i < MAX_DPLL_WAIT_TRIES);
+
+	if (i == MAX_DPLL_WAIT_TRIES) {
+		pr_err("MX5: clk_ahb_set_rate failed\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static unsigned long _clk_ahb_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 (div > 8)
+		div = 8;
+	else if (div == 0)
+		div++;
+	return parent_rate / div;
+}
+
+
+static int _clk_max_enable(struct clk *clk)
+{
+	u32 reg;
+
+	_clk_ccgr_enable(clk);
+
+	/* Handshake with MAX when LPM is entered. */
+	reg = __raw_readl(MXC_CCM_CLPCR);
+	reg &= ~MXC_CCM_CLPCR_BYPASS_MAX_LPM_HS;
+	__raw_writel(reg, MXC_CCM_CLPCR);
+
+	return 0;
+}
+
+static void _clk_max_disable(struct clk *clk)
+{
+	u32 reg;
+
+	_clk_ccgr_disable_inwait(clk);
+
+	/* No Handshake with MAX when LPM is entered as its disabled. */
+	reg = __raw_readl(MXC_CCM_CLPCR);
+	reg |= MXC_CCM_CLPCR_BYPASS_MAX_LPM_HS;
+	__raw_writel(reg, MXC_CCM_CLPCR);
+}
+
+static unsigned long clk_ipg_get_rate(struct clk *clk)
+{
+	u32 reg, div;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	reg = __raw_readl(MXC_CCM_CBCDR);
+	div = ((reg & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
+	       MXC_CCM_CBCDR_IPG_PODF_OFFSET) + 1;
+
+	return parent_rate / div;
+}
+
+static unsigned long clk_ipg_per_get_rate(struct clk *clk)
+{
+	u32 reg, prediv1, prediv2, podf;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	if (clk->parent == &main_bus_clk || clk->parent == &lp_apm_clk) {
+		/* the main_bus_clk is the one before the DVFS engine */
+		reg = __raw_readl(MXC_CCM_CBCDR);
+		prediv1 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
+			   MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET) + 1;
+		prediv2 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
+			   MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET) + 1;
+		podf = ((reg & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
+			MXC_CCM_CBCDR_PERCLK_PODF_OFFSET) + 1;
+		return parent_rate / (prediv1 * prediv2 * podf);
+	} else if (clk->parent == &ipg_clk)
+		return parent_rate;
+	else
+		BUG();
+}
+
+static int _clk_ipg_per_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg;
+
+	reg = __raw_readl(MXC_CCM_CBCMR);
+
+	reg &= ~MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
+	reg &= ~MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
+
+	if (parent == &ipg_clk)
+		reg |= MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
+	else if (parent == &lp_apm_clk)
+		reg |= MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
+	else if (parent != &main_bus_clk)
+		return -EINVAL;
+
+	__raw_writel(reg, MXC_CCM_CBCMR);
+
+	return 0;
+}
+
+static unsigned long clk_uart_get_rate(struct clk *clk)
+{
+	u32 reg, prediv, podf;
+	unsigned long parent_rate;
+
+	parent_rate = clk_get_rate(clk->parent);
+
+	reg = __raw_readl(MXC_CCM_CSCDR1);
+	prediv = ((reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >>
+		  MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET) + 1;
+	podf = ((reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >>
+		MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET) + 1;
+
+	return parent_rate / (prediv * podf);
+}
+
+static int _clk_uart_set_parent(struct clk *clk, struct clk *parent)
+{
+	u32 reg, mux;
+
+	mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, &pll3_sw_clk,
+		       &lp_apm_clk);
+	reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_UART_CLK_SEL_MASK;
+	reg |= mux << MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET;
+	__raw_writel(reg, MXC_CCM_CSCMR1);
+
+	return 0;
+}
+
+static unsigned long get_high_reference_clock_rate(struct clk *clk)
+{
+	return external_high_reference;
+}
+
+static unsigned long get_low_reference_clock_rate(struct clk *clk)
+{
+	return external_low_reference;
+}
+
+static unsigned long get_oscillator_reference_clock_rate(struct clk *clk)
+{
+	return oscillator_reference;
+}
+
+static unsigned long get_ckih2_reference_clock_rate(struct clk *clk)
+{
+	return ckih2_reference;
+}
+
+/* External high frequency clock */
+static struct clk ckih_clk = {
+	.get_rate = get_high_reference_clock_rate,
+};
+
+static struct clk ckih2_clk = {
+	.get_rate = get_ckih2_reference_clock_rate,
+};
+
+static struct clk osc_clk = {
+	.get_rate = get_oscillator_reference_clock_rate,
+};
+
+/* External low frequency (32kHz) clock */
+static struct clk ckil_clk = {
+	.get_rate = get_low_reference_clock_rate,
+};
+
+static struct clk pll1_main_clk = {
+	.parent = &osc_clk,
+	.get_rate = clk_pll_get_rate,
+	.enable = _clk_pll_enable,
+	.disable = _clk_pll_disable,
+};
+
+/* Clock tree block diagram (WIP):
+ * 	CCM: Clock Controller Module
+ *
+ * PLL output -> |
+ *               | CCM Switcher -> CCM_CLK_ROOT_GEN ->
+ * PLL bypass -> |
+ *
+ */
+
+/* PLL1 SW supplies to ARM core */
+static struct clk pll1_sw_clk = {
+	.parent = &pll1_main_clk,
+	.set_parent = _clk_pll1_sw_set_parent,
+	.get_rate = clk_pll1_sw_get_rate,
+};
+
+/* PLL2 SW supplies to AXI/AHB/IP buses */
+static struct clk pll2_sw_clk = {
+	.parent = &osc_clk,
+	.get_rate = clk_pll_get_rate,
+	.set_rate = _clk_pll_set_rate,
+	.set_parent = _clk_pll2_sw_set_parent,
+	.enable = _clk_pll_enable,
+	.disable = _clk_pll_disable,
+};
+
+/* PLL3 SW supplies to serial clocks like USB, SSI, etc. */
+static struct clk pll3_sw_clk = {
+	.parent = &osc_clk,
+	.set_rate = _clk_pll_set_rate,
+	.get_rate = clk_pll_get_rate,
+	.enable = _clk_pll_enable,
+	.disable = _clk_pll_disable,
+};
+
+/* Low-power Audio Playback Mode clock */
+static struct clk lp_apm_clk = {
+	.parent = &osc_clk,
+	.set_parent = _clk_lp_apm_set_parent,
+};
+
+static struct clk periph_apm_clk = {
+	.parent = &pll1_sw_clk,
+	.set_parent = _clk_periph_apm_set_parent,
+};
+
+static struct clk cpu_clk = {
+	.parent = &pll1_sw_clk,
+	.get_rate = clk_arm_get_rate,
+};
+
+static struct clk ahb_clk = {
+	.parent = &main_bus_clk,
+	.get_rate = clk_ahb_get_rate,
+	.set_rate = _clk_ahb_set_rate,
+	.round_rate = _clk_ahb_round_rate,
+};
+
+/* Main IP interface clock for access to registers */
+static struct clk ipg_clk = {
+	.parent = &ahb_clk,
+	.get_rate = clk_ipg_get_rate,
+};
+
+static struct clk ipg_perclk = {
+	.parent = &lp_apm_clk,
+	.get_rate = clk_ipg_per_get_rate,
+	.set_parent = _clk_ipg_per_set_parent,
+};
+
+static struct clk uart_root_clk = {
+	.parent = &pll2_sw_clk,
+	.get_rate = clk_uart_get_rate,
+	.set_parent = _clk_uart_set_parent,
+};
+
+static struct clk ahb_max_clk = {
+	.parent = &ahb_clk,
+	.enable_reg = MXC_CCM_CCGR0,
+	.enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
+	.enable = _clk_max_enable,
+	.disable = _clk_max_disable,
+};
+
+static struct clk aips_tz1_clk = {
+	.parent = &ahb_clk,
+	.secondary = &ahb_max_clk,
+	.enable_reg = MXC_CCM_CCGR0,
+	.enable_shift = MXC_CCM_CCGRx_CG12_OFFSET,
+	.enable = _clk_ccgr_enable,
+	.disable = _clk_ccgr_disable_inwait,
+};
+
+static struct clk aips_tz2_clk = {
+	.parent = &ahb_clk,
+	.secondary = &ahb_max_clk,
+	.enable_reg = MXC_CCM_CCGR0,
+	.enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
+	.enable = _clk_ccgr_enable,
+	.disable = _clk_ccgr_disable_inwait,
+};
+
+static struct clk gpt_32k_clk = {
+	.id = 0,
+	.parent = &ckil_clk,
+};
+
+#define DEFINE_CLOCK(name, i, er, es, gr, sr, p, s)	\
+	static struct clk name = {			\
+		.id		= i,			\
+		.enable_reg	= er,			\
+		.enable_shift	= es,			\
+		.get_rate	= gr,			\
+		.set_rate	= sr,			\
+		.enable		= _clk_ccgr_enable,	\
+		.disable	= _clk_ccgr_disable,	\
+		.parent		= p,			\
+		.secondary	= s,			\
+	}
+
+/* DEFINE_CLOCK(name, id, enable_reg, enable_shift,
+   get_rate, set_rate, parent, secondary); */
+
+/* Shared peripheral bus arbiter */
+DEFINE_CLOCK(spba_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG0_OFFSET,
+	NULL,  NULL, &ipg_clk, NULL);
+
+/* UART */
+DEFINE_CLOCK(uart1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG4_OFFSET,
+	NULL,  NULL, &uart_root_clk, NULL);
+DEFINE_CLOCK(uart2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG6_OFFSET,
+	NULL,  NULL, &uart_root_clk, NULL);
+DEFINE_CLOCK(uart3_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG8_OFFSET,
+	NULL,  NULL, &uart_root_clk, NULL);
+DEFINE_CLOCK(uart1_ipg_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG3_OFFSET,
+	NULL,  NULL, &ipg_clk, &aips_tz1_clk);
+DEFINE_CLOCK(uart2_ipg_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG5_OFFSET,
+	NULL,  NULL, &ipg_clk, &aips_tz1_clk);
+DEFINE_CLOCK(uart3_ipg_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG7_OFFSET,
+	NULL,  NULL, &ipg_clk, &spba_clk);
+
+/* GPT */
+DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
+	NULL,  NULL, &ipg_clk, NULL);
+DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
+	NULL,  NULL, &ipg_clk, NULL);
+
+/* FEC */
+DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
+	NULL,  NULL, &ipg_clk, NULL);
+
+#define _REGISTER_CLOCK(d, n, c) \
+       { \
+		.dev_id = d, \
+		.con_id = n, \
+		.clk = &c,   \
+       },
+
+static struct clk_lookup lookups[] = {
+	_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(NULL, "gpt", gpt_clk)
+	_REGISTER_CLOCK("fec.0", NULL, fec_clk)
+};
+
+static void clk_tree_init(void)
+{
+	u32 reg;
+
+	ipg_perclk.set_parent(&ipg_perclk, &lp_apm_clk);
+
+	/*
+	 * Initialise the IPG PER CLK dividers to 3. IPG_PER_CLK should be at
+	 * 8MHz, its derived from lp_apm.
+	 *
+	 * FIXME: Verify if true for all boards
+	 */
+	reg = __raw_readl(MXC_CCM_CBCDR);
+	reg &= ~MXC_CCM_CBCDR_PERCLK_PRED1_MASK;
+	reg &= ~MXC_CCM_CBCDR_PERCLK_PRED2_MASK;
+	reg &= ~MXC_CCM_CBCDR_PERCLK_PODF_MASK;
+	reg |= (2 << MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET);
+	__raw_writel(reg, MXC_CCM_CBCDR);
+}
+
+int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
+			unsigned long ckih1, unsigned long ckih2)
+{
+	int i;
+
+	external_low_reference = ckil;
+	external_high_reference = ckih1;
+	ckih2_reference = ckih2;
+	oscillator_reference = osc;
+
+	for (i = 0; i < ARRAY_SIZE(lookups); i++)
+		clkdev_add(&lookups[i]);
+
+	clk_tree_init();
+
+	clk_enable(&cpu_clk);
+	clk_enable(&main_bus_clk);
+
+	/* System timer */
+	mxc_timer_init(&gpt_clk, MX51_IO_ADDRESS(MX51_GPT1_BASE_ADDR),
+		MX51_MXC_INT_GPT);
+	return 0;
+}
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c
new file mode 100644
index 00000000000..2d37785e385
--- /dev/null
+++ b/arch/arm/mach-mx5/cpu.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * This file contains the CPU initialization code.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <mach/hardware.h>
+#include <asm/io.h>
+
+static int cpu_silicon_rev = -1;
+
+#define SI_REV 0x48
+
+static void query_silicon_parameter(void)
+{
+	void __iomem *rom = ioremap(MX51_IROM_BASE_ADDR, MX51_IROM_SIZE);
+	u32 rev;
+
+	if (!rom) {
+		cpu_silicon_rev = -EINVAL;
+		return;
+	}
+
+	rev = readl(rom + SI_REV);
+	switch (rev) {
+	case 0x1:
+		cpu_silicon_rev = MX51_CHIP_REV_1_0;
+		break;
+	case 0x2:
+		cpu_silicon_rev = MX51_CHIP_REV_1_1;
+		break;
+	case 0x10:
+		cpu_silicon_rev = MX51_CHIP_REV_2_0;
+		break;
+	case 0x20:
+		cpu_silicon_rev = MX51_CHIP_REV_3_0;
+		break;
+	default:
+		cpu_silicon_rev = 0;
+	}
+
+	iounmap(rom);
+}
+
+/*
+ * Returns:
+ *	the silicon revision of the cpu
+ *	-EINVAL - not a mx51
+ */
+int mx51_revision(void)
+{
+	if (!cpu_is_mx51())
+		return -EINVAL;
+
+	if (cpu_silicon_rev == -1)
+		query_silicon_parameter();
+
+	return cpu_silicon_rev;
+}
+EXPORT_SYMBOL(mx51_revision);
+
+static int __init post_cpu_init(void)
+{
+	unsigned int reg;
+	void __iomem *base;
+
+	if (!cpu_is_mx51())
+		return 0;
+
+	base = MX51_IO_ADDRESS(MX51_AIPS1_BASE_ADDR);
+	__raw_writel(0x0, base + 0x40);
+	__raw_writel(0x0, base + 0x44);
+	__raw_writel(0x0, base + 0x48);
+	__raw_writel(0x0, base + 0x4C);
+	reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
+	__raw_writel(reg, base + 0x50);
+
+	base = MX51_IO_ADDRESS(MX51_AIPS2_BASE_ADDR);
+	__raw_writel(0x0, base + 0x40);
+	__raw_writel(0x0, base + 0x44);
+	__raw_writel(0x0, base + 0x48);
+	__raw_writel(0x0, base + 0x4C);
+	reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
+	__raw_writel(reg, base + 0x50);
+
+	return 0;
+}
+
+postcore_initcall(post_cpu_init);
diff --git a/arch/arm/mach-mx5/crm_regs.h b/arch/arm/mach-mx5/crm_regs.h
new file mode 100644
index 00000000000..c776b9af062
--- /dev/null
+++ b/arch/arm/mach-mx5/crm_regs.h
@@ -0,0 +1,583 @@
+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#ifndef __ARCH_ARM_MACH_MX51_CRM_REGS_H__
+#define __ARCH_ARM_MACH_MX51_CRM_REGS_H__
+
+#define MX51_CCM_BASE		MX51_IO_ADDRESS(MX51_CCM_BASE_ADDR)
+#define MX51_DPLL1_BASE		MX51_IO_ADDRESS(MX51_PLL1_BASE_ADDR)
+#define MX51_DPLL2_BASE		MX51_IO_ADDRESS(MX51_PLL2_BASE_ADDR)
+#define MX51_DPLL3_BASE		MX51_IO_ADDRESS(MX51_PLL3_BASE_ADDR)
+#define MX51_CORTEXA8_BASE	MX51_IO_ADDRESS(MX51_ARM_BASE_ADDR)
+#define MX51_GPC_BASE		MX51_IO_ADDRESS(MX51_GPC_BASE_ADDR)
+
+/* PLL Register Offsets */
+#define MXC_PLL_DP_CTL			0x00
+#define MXC_PLL_DP_CONFIG		0x04
+#define MXC_PLL_DP_OP			0x08
+#define MXC_PLL_DP_MFD			0x0C
+#define MXC_PLL_DP_MFN			0x10
+#define MXC_PLL_DP_MFNMINUS		0x14
+#define MXC_PLL_DP_MFNPLUS		0x18
+#define MXC_PLL_DP_HFS_OP		0x1C
+#define MXC_PLL_DP_HFS_MFD		0x20
+#define MXC_PLL_DP_HFS_MFN		0x24
+#define MXC_PLL_DP_MFN_TOGC		0x28
+#define MXC_PLL_DP_DESTAT		0x2c
+
+/* PLL Register Bit definitions */
+#define MXC_PLL_DP_CTL_