Merge branch 'u300' into devel

Conflicts:
	arch/arm/Makefile
Updates:
	arch/arm/mach-u300/core.c
	arch/arm/mach-u300/timer.c

28 files changed, 5318 insertions, 0 deletions

diff --git a/arch/arm/mach-u300/Kconfig b/arch/arm/mach-u300/Kconfig
new file mode 100644
index 00000000000..337b9aabce4
--- /dev/null
+++ b/arch/arm/mach-u300/Kconfig
@@ -0,0 +1,105 @@
+if ARCH_U300
+
+menu "ST-Ericsson AB U300/U330/U335/U365 Platform"
+
+comment "ST-Ericsson Mobile Platform Products"
+
+config MACH_U300
+	bool "U300"
+
+comment "ST-Ericsson U300/U330/U335/U365 Feature Selections"
+
+choice
+	prompt "U300/U330/U335/U365 system type"
+	default MACH_U300_BS2X
+	---help---
+	You need to select the target system, i.e. the
+	U300/U330/U335/U365 board that you want to compile your kernel
+	for.
+
+config MACH_U300_BS2X
+	bool "S26/S26/B25/B26 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S26/S25 test products. (Also works on
+		B26/B25 big boards.)
+
+config MACH_U300_BS330
+	bool "S330/B330 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S330/B330 test products.
+
+config MACH_U300_BS335
+	bool "S335/B335 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S335/B335 test products.
+
+config MACH_U300_BS365
+	bool "S365/B365 Test Products"
+	depends on MACH_U300
+	help
+		Select this if you're developing on the
+		S365/B365 test products.
+
+endchoice
+
+choice
+	prompt "Memory configuration"
+	default MACH_U300_SINGLE_RAM
+	---help---
+	You have to config the kernel according to the physical memory
+	configuration.
+
+config MACH_U300_SINGLE_RAM
+	bool "Single RAM"
+	help
+		Select this if you want support for Single RAM phones.
+
+config MACH_U300_DUAL_RAM
+	bool "Dual RAM"
+	help
+		Select this if you want support for Dual RAM phones.
+		This is two RAM memorys on different EMIFs.
+endchoice
+
+config U300_DEBUG
+	bool "Debug support for U300"
+	depends on PM
+	help
+		Debug support for U300 in sysfs, procfs etc.
+
+config MACH_U300_SEMI_IS_SHARED
+	bool "The SEMI is used by both the access and application side"
+	depends on MACH_U300
+	help
+		This makes it possible to use the SEMI (Shared External
+		Memory Interface) from both from access and application
+		side.
+
+comment "All the settings below must match the bootloader's settings"
+
+config MACH_U300_ACCESS_MEM_SIZE
+       int "Access CPU memory allocation"
+       range 7 25
+       depends on MACH_U300_SINGLE_RAM
+       default 13
+       help
+		How much memory in MiB that the Access side CPU has allocated
+
+config MACH_U300_2MB_ALIGNMENT_FIX
+       bool "2MiB alignment fix"
+       depends on MACH_U300_SINGLE_RAM
+       default y
+       help
+		If yes and the Access side CPU has allocated an odd size in
+		MiB, this fix gives you one MiB extra that would otherwise be
+		lost due to Linux 2 MiB alignment policy.
+
+endmenu
+
+endif
diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
new file mode 100644
index 00000000000..24950e0df4b
--- /dev/null
+++ b/arch/arm/mach-u300/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the linux kernel, U300 machine.
+#
+
+obj-y		:= core.o clock.o timer.o gpio.o padmux.o
+obj-m		:=
+obj-n		:=
+obj-		:=
+
+obj-$(CONFIG_ARCH_U300)	          += u300.o
+obj-$(CONFIG_MMC)                 += mmc.o
diff --git a/arch/arm/mach-u300/Makefile.boot b/arch/arm/mach-u300/Makefile.boot
new file mode 100644
index 00000000000..6fbfc6ea2d3
--- /dev/null
+++ b/arch/arm/mach-u300/Makefile.boot
@@ -0,0 +1,15 @@
+# Note: the following conditions must always be true:
+#   ZRELADDR == virt_to_phys(TEXTADDR)
+#   PARAMS_PHYS must be within 4MB of ZRELADDR
+#   INITRD_PHYS must be in RAM
+
+ifdef CONFIG_MACH_U300_SINGLE_RAM
+     zreladdr-y	:= 0x28E08000
+  params_phys-y	:= 0x28E00100
+else
+     zreladdr-y	:= 0x48008000
+  params_phys-y	:= 0x48000100
+endif
+
+# This isn't used.
+#initrd_phys-y	:= 0x29800000
diff --git a/arch/arm/mach-u300/clock.c b/arch/arm/mach-u300/clock.c
new file mode 100644
index 00000000000..5cd04d6751b
--- /dev/null
+++ b/arch/arm/mach-u300/clock.c
@@ -0,0 +1,1487 @@
+/*
+ *
+ * arch/arm/mach-u300/clock.c
+ *
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Define clocks in the app platform.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/io.h>
+
+#include <asm/clkdev.h>
+#include <mach/hardware.h>
+#include <mach/syscon.h>
+
+#include "clock.h"
+
+/*
+ * TODO:
+ * - move all handling of the CCR register into this file and create
+ *   a spinlock for the CCR register
+ * - switch to the clkdevice lookup mechanism that maps clocks to
+ *   device ID:s instead when it becomes available in kernel 2.6.29.
+ * - implement rate get/set for all clocks that need it.
+ */
+
+/*
+ * Syscon clock I/O registers lock so clock requests don't collide
+ * NOTE: this is a local lock only used to lock access to clock and
+ * reset registers in syscon.
+ */
+static DEFINE_SPINLOCK(syscon_clkreg_lock);
+static DEFINE_SPINLOCK(syscon_resetreg_lock);
+
+/*
+ * The clocking hierarchy currently looks like this.
+ * NOTE: the idea is NOT to show how the clocks are routed on the chip!
+ * The ideas is to show dependencies, so a clock higher up in the
+ * hierarchy has to be on in order for another clock to be on. Now,
+ * both CPU and DMA can actually be on top of the hierarchy, and that
+ * is not modeled currently. Instead we have the backbone AMBA bus on
+ * top. This bus cannot be programmed in any way but conceptually it
+ * needs to be active for the bridges and devices to transport data.
+ *
+ * Please be aware that a few clocks are hw controlled, which mean that
+ * the hw itself can turn on/off or change the rate of the clock when
+ * needed!
+ *
+ *  AMBA bus
+ *  |
+ *  +- CPU
+ *  +- NANDIF NAND Flash interface
+ *  +- SEMI Shared Memory interface
+ *  +- ISP Image Signal Processor (U335 only)
+ *  +- CDS (U335 only)
+ *  +- DMA Direct Memory Access Controller
+ *  +- AAIF APP/ACC Inteface (Mobile Scalable Link, MSL)
+ *  +- APEX
+ *  +- VIDEO_ENC AVE2/3 Video Encoder
+ *  +- XGAM Graphics Accelerator Controller
+ *  +- AHB
+ *  |
+ *  +- ahb:0 AHB Bridge
+ *  |  |
+ *  |  +- ahb:1 INTCON Interrupt controller
+ *  |  +- ahb:3 MSPRO  Memory Stick Pro controller
+ *  |  +- ahb:4 EMIF   External Memory interface
+ *  |
+ *  +- fast:0 FAST bridge
+ *  |  |
+ *  |  +- fast:1 MMCSD MMC/SD card reader controller
+ *  |  +- fast:2 I2S0  PCM I2S channel 0 controller
+ *  |  +- fast:3 I2S1  PCM I2S channel 1 controller
+ *  |  +- fast:4 I2C0  I2C channel 0 controller
+ *  |  +- fast:5 I2C1  I2C channel 1 controller
+ *  |  +- fast:6 SPI   SPI controller
+ *  |  +- fast:7 UART1 Secondary UART (U335 only)
+ *  |
+ *  +- slow:0 SLOW bridge
+ *     |
+ *     +- slow:1 SYSCON (not possible to control)
+ *     +- slow:2 WDOG Watchdog
+ *     +- slow:3 UART0 primary UART
+ *     +- slow:4 TIMER_APP Application timer - used in Linux
+ *     +- slow:5 KEYPAD controller
+ *     +- slow:6 GPIO controller
+ *     +- slow:7 RTC controller
+ *     +- slow:8 BT Bus Tracer (not used currently)
+ *     +- slow:9 EH Event Handler (not used currently)
+ *     +- slow:a TIMER_ACC Access style timer (not used currently)
+ *     +- slow:b PPM (U335 only, what is that?)
+ */
+
+/*
+ * Reset control functions. We remember if a block has been
+ * taken out of reset and don't remove the reset assertion again
+ * and vice versa. Currently we only remove resets so the
+ * enablement function is defined out.
+ */
+static void syscon_block_reset_enable(struct clk *clk)
+{
+	u16 val;
+	unsigned long iflags;
+
+	/* Not all blocks support resetting */
+	if (!clk->res_reg || !clk->res_mask)
+		return;
+	spin_lock_irqsave(&syscon_resetreg_lock, iflags);
+	val = readw(clk->res_reg);
+	val |= clk->res_mask;
+	writew(val, clk->res_reg);
+	spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
+	clk->reset = true;
+}
+
+static void syscon_block_reset_disable(struct clk *clk)
+{
+	u16 val;
+	unsigned long iflags;
+
+	/* Not all blocks support resetting */
+	if (!clk->res_reg || !clk->res_mask)
+		return;
+	spin_lock_irqsave(&syscon_resetreg_lock, iflags);
+	val = readw(clk->res_reg);
+	val &= ~clk->res_mask;
+	writew(val, clk->res_reg);
+	spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
+	clk->reset = false;
+}
+
+int __clk_get(struct clk *clk)
+{
+	u16 val;
+
+	/* The MMC and MSPRO clocks need some special set-up */
+	if (!strcmp(clk->name, "MCLK")) {
+		/* Set default MMC clock divisor to 18.9 MHz */
+		writew(0x0054U, U300_SYSCON_VBASE + U300_SYSCON_MMF0R);
+		val = readw(U300_SYSCON_VBASE + U300_SYSCON_MMCR);
+		/* Disable the MMC feedback clock */
+		val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
+		/* Disable MSPRO frequency */
+		val &= ~U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
+		writew(val, U300_SYSCON_VBASE + U300_SYSCON_MMCR);
+	}
+	if (!strcmp(clk->name, "MSPRO")) {
+		val = readw(U300_SYSCON_VBASE + U300_SYSCON_MMCR);
+		/* Disable the MMC feedback clock */
+		val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
+		/* Enable MSPRO frequency */
+		val |= U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
+		writew(val, U300_SYSCON_VBASE + U300_SYSCON_MMCR);
+	}
+	return 1;
+}
+EXPORT_SYMBOL(__clk_get);
+
+void __clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(__clk_put);
+
+static void syscon_clk_disable(struct clk *clk)
+{
+	unsigned long iflags;
+
+	/* Don't touch the hardware controlled clocks */
+	if (clk->hw_ctrld)
+		return;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	writew(clk->clk_val, U300_SYSCON_VBASE + U300_SYSCON_SBCDR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+static void syscon_clk_enable(struct clk *clk)
+{
+	unsigned long iflags;
+
+	/* Don't touch the hardware controlled clocks */
+	if (clk->hw_ctrld)
+		return;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	writew(clk->clk_val, U300_SYSCON_VBASE + U300_SYSCON_SBCER);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+static u16 syscon_clk_get_rate(void)
+{
+	u16 val;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val &= U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+	return val;
+}
+
+#ifdef CONFIG_MACH_U300_USE_I2S_AS_MASTER
+static void enable_i2s0_vcxo(void)
+{
+	u16 val;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	/* Set I2S0 to use the VCXO 26 MHz clock */
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val |= U300_SYSCON_CCR_TURN_VCXO_ON;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val |= U300_SYSCON_CCR_I2S0_USE_VCXO;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	val |= U300_SYSCON_CEFR_I2S0_CLK_EN;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+static void enable_i2s1_vcxo(void)
+{
+	u16 val;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	/* Set I2S1 to use the VCXO 26 MHz clock */
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val |= U300_SYSCON_CCR_TURN_VCXO_ON;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val |= U300_SYSCON_CCR_I2S1_USE_VCXO;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	val |= U300_SYSCON_CEFR_I2S1_CLK_EN;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+static void disable_i2s0_vcxo(void)
+{
+	u16 val;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	/* Disable I2S0 use of the VCXO 26 MHz clock */
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val &= ~U300_SYSCON_CCR_I2S0_USE_VCXO;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	/* Deactivate VCXO if noone else is using VCXO */
+	if (!(val & U300_SYSCON_CCR_I2S1_USE_VCXO))
+		val &= ~U300_SYSCON_CCR_TURN_VCXO_ON;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	val &= ~U300_SYSCON_CEFR_I2S0_CLK_EN;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+static void disable_i2s1_vcxo(void)
+{
+	u16 val;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	/* Disable I2S1 use of the VCXO 26 MHz clock */
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val &= ~U300_SYSCON_CCR_I2S1_USE_VCXO;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	/* Deactivate VCXO if noone else is using VCXO */
+	if (!(val & U300_SYSCON_CCR_I2S0_USE_VCXO))
+		val &= ~U300_SYSCON_CCR_TURN_VCXO_ON;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	val = readw(U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	val &= ~U300_SYSCON_CEFR_I2S0_CLK_EN;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CEFR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+#endif /* CONFIG_MACH_U300_USE_I2S_AS_MASTER */
+
+
+static void syscon_clk_rate_set_mclk(unsigned long rate)
+{
+	u16 val;
+	u32 reg;
+	unsigned long iflags;
+
+	switch (rate) {
+	case 18900000:
+		val = 0x0054;
+		break;
+	case 20800000:
+		val = 0x0044;
+		break;
+	case 23100000:
+		val = 0x0043;
+		break;
+	case 26000000:
+		val = 0x0033;
+		break;
+	case 29700000:
+		val = 0x0032;
+		break;
+	case 34700000:
+		val = 0x0022;
+		break;
+	case 41600000:
+		val = 0x0021;
+		break;
+	case 52000000:
+		val = 0x0011;
+		break;
+	case 104000000:
+		val = 0x0000;
+		break;
+	default:
+		printk(KERN_ERR "Trying to set MCLK to unknown speed! %ld\n",
+		       rate);
+		return;
+	}
+
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	reg = readw(U300_SYSCON_VBASE + U300_SYSCON_MMF0R) &
+		~U300_SYSCON_MMF0R_MASK;
+	writew(reg | val, U300_SYSCON_VBASE + U300_SYSCON_MMF0R);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+
+void syscon_clk_rate_set_cpuclk(unsigned long rate)
+{
+	u16 val;
+	unsigned long iflags;
+
+	switch (rate) {
+	case 13000000:
+		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER;
+		break;
+	case 52000000:
+		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE;
+		break;
+	case 104000000:
+		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH;
+		break;
+	case 208000000:
+		val = U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST;
+		break;
+	default:
+		return;
+	}
+	spin_lock_irqsave(&syscon_clkreg_lock, iflags);
+	val |= readw(U300_SYSCON_VBASE + U300_SYSCON_CCR) &
+		~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK ;
+	writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
+	spin_unlock_irqrestore(&syscon_clkreg_lock, iflags);
+}
+EXPORT_SYMBOL(syscon_clk_rate_set_cpuclk);
+
+void clk_disable(struct clk *clk)
+{
+	unsigned long iflags;
+
+	spin_lock_irqsave(&clk->lock, iflags);
+	if (clk->usecount > 0 && !(--clk->usecount)) {
+		/* some blocks lack clocking registers and cannot be disabled */
+		if (clk->disable)
+			clk->disable(clk);
+		if (likely((u32)clk->parent))
+			clk_disable(clk->parent);
+	}
+#ifdef CONFIG_MACH_U300_USE_I2S_AS_MASTER
+	if (unlikely(!strcmp(clk->name, "I2S0")))
+		disable_i2s0_vcxo();
+	if (unlikely(!strcmp(clk->name, "I2S1")))
+		disable_i2s1_vcxo();
+#endif
+	spin_unlock_irqrestore(&clk->lock, iflags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+int clk_enable(struct clk *clk)
+{
+	int ret = 0;
+	unsigned long iflags;
+
+	spin_lock_irqsave(&clk->lock, iflags);
+	if (clk->usecount++ == 0) {
+		if (likely((u32)clk->parent))
+			ret = clk_enable(clk->parent);
+
+		if (unlikely(ret != 0))
+			clk->usecount--;
+		else {
+			/* remove reset line (we never enable reset again) */
+			syscon_block_reset_disable(clk);
+			/* clocks without enable function are always on */
+			if (clk->enable)
+				clk->enable(clk);
+#ifdef CONFIG_MACH_U300_USE_I2S_AS_MASTER
+			if (unlikely(!strcmp(clk->name, "I2S0")))
+				enable_i2s0_vcxo();
+			if (unlikely(!strcmp(clk->name, "I2S1")))
+				enable_i2s1_vcxo();
+#endif
+		}
+	}
+	spin_unlock_irqrestore(&clk->lock, iflags);
+	return ret;
+
+}
+EXPORT_SYMBOL(clk_enable);
+
+/* Returns the clock rate in Hz */
+static unsigned long clk_get_rate_cpuclk(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+		return 13000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+		return 52000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+		return 104000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+		return 208000000;
+	default:
+		break;
+	}
+	return clk->rate;
+}
+
+static unsigned long clk_get_rate_ahb_clk(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+		return 6500000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+		return 26000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+		return 52000000;
+	default:
+		break;
+	}
+	return clk->rate;
+
+}
+
+static unsigned long clk_get_rate_emif_clk(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+		return 13000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+		return 52000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+		return 104000000;
+	default:
+		break;
+	}
+	return clk->rate;
+
+}
+
+static unsigned long clk_get_rate_xgamclk(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+		return 6500000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+		return 26000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+		return 52000000;
+	default:
+		break;
+	}
+
+	return clk->rate;
+}
+
+static unsigned long clk_get_rate_mclk(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+		/*
+		 * Here, the 208 MHz PLL gets shut down and the always
+		 * on 13 MHz PLL used for RTC etc kicks into use
+		 * instead.
+		 */
+		return 13000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+	{
+		/*
+		 * This clock is under program control. The register is
+		 * divided in two nybbles, bit 7-4 gives cycles-1 to count
+		 * high, bit 3-0 gives cycles-1 to count low. Distribute
+		 * these with no more than 1 cycle difference between
+		 * low and high and add low and high to get the actual
+		 * divisor. The base PLL is 208 MHz. Writing 0x00 will
+		 * divide by 1 and 1 so the highest frequency possible
+		 * is 104 MHz.
+		 *
+		 * e.g. 0x54 =>
+		 * f = 208 / ((5+1) + (4+1)) = 208 / 11 = 18.9 MHz
+		 */
+		u16 val = readw(U300_SYSCON_VBASE + U300_SYSCON_MMF0R) &
+			U300_SYSCON_MMF0R_MASK;
+		switch (val) {
+		case 0x0054:
+			return 18900000;
+		case 0x0044:
+			return 20800000;
+		case 0x0043:
+			return 23100000;
+		case 0x0033:
+			return 26000000;
+		case 0x0032:
+			return 29700000;
+		case 0x0022:
+			return 34700000;
+		case 0x0021:
+			return 41600000;
+		case 0x0011:
+			return 52000000;
+		case 0x0000:
+			return 104000000;
+		default:
+			break;
+		}
+	}
+	default:
+		break;
+	}
+
+	return clk->rate;
+}
+
+static unsigned long clk_get_rate_i2s_i2c_spi(struct clk *clk)
+{
+	u16 val;
+
+	val = syscon_clk_get_rate();
+
+	switch (val) {
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
+		return 13000000;
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
+	case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
+		return 26000000;
+	default:
+		break;
+	}
+
+	return clk->rate;
+}
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	if (clk->get_rate)
+		return clk->get_rate(clk);
+	else
+		return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+static unsigned long clk_round_rate_mclk(struct clk *clk, unsigned long rate)
+{
+	if (rate >= 18900000)
+		return 18900000;
+	if (rate >= 20800000)
+		return 20800000;
+	if (rate >= 23100000)
+		return 23100000;
+	if (rate >= 26000000)
+		return 26000000;
+	if (rate >= 29700000)
+		return 29700000;
+	if (rate >= 34700000)
+		return 34700000;
+	if (rate >= 41600000)
+		return 41600000;
+	if (rate >= 52000000)
+		return 52000000;
+	return -EINVAL;
+}
+
+static unsigned long clk_round_rate_cpuclk(struct clk *clk, unsigned long rate)
+{
+	if (rate >= 13000000)
+		return 13000000;
+	if (rate >= 52000000)
+		return 52000000;
+	if (rate >= 104000000)
+		return 104000000;
+	if (rate >= 208000000)
+		return 208000000;
+	return -EINVAL;
+}
+
+/*
+ * This adjusts a requested rate to the closest exact rate
+ * a certain clock can provide. For a fixed clock it's
+ * mostly clk->rate.
+ */
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+	/* TODO: get apropriate switches for EMIFCLK, AHBCLK and MCLK */
+	/* Else default to fixed value */
+
+	if (clk->round_rate) {
+		return (long) clk->round_rate(clk, rate);
+	} else {
+		printk(KERN_ERR "clock: Failed to round rate of %s\n",
+		       clk->name);
+	}
+	return (long) clk->rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+static int clk_set_rate_mclk(struct clk *clk, unsigned long rate)
+{
+	syscon_clk_rate_set_mclk(clk_round_rate(clk, rate));
+	return 0;
+}
+
+static int clk_set_rate_cpuclk(struct clk *clk, unsigned long rate)
+{
+	syscon_clk_rate_set_cpuclk(clk_round_rate(clk, rate));
+	return 0;
+}
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	/* TODO: set for EMIFCLK and AHBCLK */
+	/* Else assume the clock is fixed and fail */
+	if (clk->set_rate) {
+		return clk->set_rate(clk, rate);
+	} else {
+		printk(KERN_ERR "clock: Failed to set %s to %ld hz\n",
+		       clk->name, rate);
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+/*
+ * Clock definitions. The clock parents are set to respective
+ * bridge and the clock framework makes sure that the clocks have
+ * parents activated and are brought out of reset when in use.
+ *
+ * Clocks that have hw_ctrld = true are hw controlled, and the hw
+ * can by itself turn these clocks on and off.
+ * So in other words, we don't really have to care about them.
+ */
+
+static struct clk amba_clk = {
+	.name	    = "AMBA",
+	.rate	    = 52000000, /* this varies! */
+	.hw_ctrld   = true,
+	.reset	    = false,
+};
+
+/*
+ * These blocks are connected directly to the AMBA bus
+ * with no bridge.
+ */
+
+static struct clk cpu_clk = {
+	.name	    = "CPU",
+	.parent	    = &amba_clk,
+	.rate	    = 208000000, /* this varies! */
+	.hw_ctrld   = true,
+	.reset	    = true,
+	.res_reg    = U300_SYSCON_VBASE + U300_SYSCON_RRR,
+	.res_mask   = U300_SYSCON_RRR_CPU_RESET_EN,
+	.set_rate   = clk_set_rate_cpuclk,
+	.get_rate   = clk_get_rate_cpuclk,
+	.round_rate = clk_round_rate_cpuclk,
+};
+
+static struct clk nandif_clk = {
+	.name       = "NANDIF",
+	.parent	    = &amba_clk,
+	.hw_ctrld   = false,
+	.reset	    = true,
+	.res_reg    = U300_SYSCON_VBASE + U300_SYSCON_RRR,
+	.res_mask   = U300_SYSCON_RRR_NANDIF_RESET_EN,
+	.clk_val    = U300_SYSCON_SBCER_NANDIF_CLK_EN,
+	.enable     = syscon_clk_enable,
+	.disable    = syscon_clk_disable,
+};
+
+static struct clk semi_clk = {
+	.name       = "SEMI",
+	.parent	    = &amba_clk,
+	.rate       = 0, /* FIXME */
+	/* It is not possible to reset SEMI */
+	.hw_ctrld   = false,
+	.reset	    = false,
+	.clk_val    = U300_SYSCON_SBCER_SEMI_CLK_EN,
+	.enable     = syscon_clk_enable,
+	.disable    = syscon_clk_disable,
+};
+
+#ifdef CONFIG_MACH_U300_BS335
+static struct clk isp_clk = {
+	.name	    = "ISP",
+	.parent	    = &amba_clk,
+	.rate	    = 0, /* FIXME */
+	.hw_ctrld   = false,
+	.reset	    = true,
+	.res_reg    = U300_SYSCON_VBASE + U300_SYSCON_RRR,
+	.res_mask   = U300_SYSCON_RRR_ISP_RESET_EN,
+	.clk_val    = U300_SYSCON_SBCER_ISP_CLK_EN,
+	.enable     = syscon_clk_enable,
+	.disable    = syscon_clk_disable,
+};
+
+static struct clk cds_clk = {
+	.name	    = "CDS",
+	.parent	    = &amba_clk,
+	.rate	    = 0, /* FIXME */
+	.hw_ctrld   = false,
+	.reset	    = true,
+	.res_reg    = U300_SYSCON_VBASE + U300_SYSCON_RRR,
+	.res_mask   = U300_SYSCON_RRR_CDS_RESET_EN,
+	.clk_val    = U300_SYSCON_SBCER_CDS_CLK_EN,
+	.enable     = syscon_clk_enable,
+	.disable    = syscon_clk_disable,
+};
+#endif
+
+static struct clk dma_clk = {
+	.name       = "DMA",
+	.parent	    = &amba_clk,
+	.rate       = 52000000, /* this varies! */
+	.hw_ctrld   = true,
+	.reset	    = true,
+	.res_reg    = U300_SYSCON_VBASE + U300_SYSCON_RRR,
+	.res_mask   = U300_SY