Merge branch 'next/cleanup-s3c24xx-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup

From Kukjin Kim:
This is 4th cleanup for Samsung S3C24XX stuff, and removes plat-s3c24xx
directory.

* 'next/cleanup-s3c24xx-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S3C24XX: header mach/regs-mem.h local
  ARM: S3C24XX: header mach/regs-power.h local
  ARM: S3C24XX: header mach/regs-s3c2412-mem.h local
  ARM: S3C24XX: Remove plat-s3c24xx directory in arch/arm/

37 files changed, 4728 insertions, 312 deletions

diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig
index 67df58bdc096..31eacad5b3e9 100644
--- a/arch/arm/mach-s3c24xx/Kconfig
+++ b/arch/arm/mach-s3c24xx/Kconfig
@@ -9,6 +9,15 @@
 
 if ARCH_S3C24XX
 
+config PLAT_S3C24XX
+	def_bool y
+	select ARCH_REQUIRE_GPIOLIB
+	select NO_IOPORT
+	select S3C_DEV_NAND
+	select IRQ_DOMAIN
+	help
+	  Base platform code for any Samsung S3C24XX device
+
 menu "SAMSUNG S3C24XX SoCs Support"
 
 comment "S3C24XX SoCs"
@@ -83,6 +92,17 @@ config CPU_S3C2443
 
 # common code
 
+config S3C2410_CLOCK
+	bool
+	help
+	  Clock code for the S3C2410, and similar processors which
+	  is currently includes the S3C2410, S3C2440, S3C2442.
+
+config S3C24XX_DCLK
+	bool
+	help
+	  Clock code for supporting DCLK/CLKOUT on S3C24XX architectures
+
 config S3C24XX_SMDK
 	bool
 	help
@@ -111,6 +131,22 @@ config S3C24XX_SETUP_TS
 	help
 	  Compile in platform device definition for Samsung TouchScreen.
 
+config S3C24XX_DMA
+	bool "S3C2410 DMA support"
+	depends on ARCH_S3C24XX
+	select S3C_DMA
+	help
+	  S3C2410 DMA support. This is needed for drivers like sound which
+	  use the S3C2410's DMA system to move data to and from the
+	  peripheral blocks.
+
+config S3C2410_DMA_DEBUG
+	bool "S3C2410 DMA support debug"
+	depends on ARCH_S3C24XX && S3C2410_DMA
+	help
+	  Enable debugging output for the DMA code. This option sends info
+	  to the kernel log, at priority KERN_DEBUG.
+
 config S3C2410_DMA
 	bool
 	depends on S3C24XX_DMA && (CPU_S3C2410 || CPU_S3C2442)
@@ -123,6 +159,74 @@ config S3C2410_PM
 	help
 	  Power Management code common to S3C2410 and better
 
+# low-level serial option nodes
+
+config CPU_LLSERIAL_S3C2410_ONLY
+	bool
+	default y if CPU_LLSERIAL_S3C2410 && !CPU_LLSERIAL_S3C2440
+
+config CPU_LLSERIAL_S3C2440_ONLY
+	bool
+	default y if CPU_LLSERIAL_S3C2440 && !CPU_LLSERIAL_S3C2410
+
+config CPU_LLSERIAL_S3C2410
+	bool
+	help
+	  Selected if there is an S3C2410 (or register compatible) serial
+	  low-level implementation needed
+
+config CPU_LLSERIAL_S3C2440
+	bool
+	help
+	  Selected if there is an S3C2440 (or register compatible) serial
+	  low-level implementation needed
+
+# gpio configurations
+
+config S3C24XX_GPIO_EXTRA
+	int
+	default 128 if S3C24XX_GPIO_EXTRA128
+	default 64 if S3C24XX_GPIO_EXTRA64
+	default 16 if ARCH_H1940
+	default 0
+
+config S3C24XX_GPIO_EXTRA64
+	bool
+	help
+	  Add an extra 64 gpio numbers to the available GPIO pool. This is
+	  available for boards that need extra gpios for external devices.
+
+config S3C24XX_GPIO_EXTRA128
+	bool
+	help
+	  Add an extra 128 gpio numbers to the available GPIO pool. This is
+	  available for boards that need extra gpios for external devices.
+
+# cpu frequency items common between s3c2410 and s3c2440/s3c2442
+
+config S3C2410_IOTIMING
+	bool
+	depends on CPU_FREQ_S3C24XX
+	help
+	  Internal node to select io timing code that is common to the s3c2410
+	  and s3c2440/s3c2442 cpu frequency support.
+
+config S3C2410_CPUFREQ_UTILS
+	bool
+	depends on CPU_FREQ_S3C24XX
+	help
+	  Internal node to select timing code that is common to the s3c2410
+	  and s3c2440/s3c244 cpu frequency support.
+
+# cpu frequency support common to s3c2412, s3c2413 and s3c2442
+
+config S3C2412_IOTIMING
+	bool
+	depends on CPU_FREQ_S3C24XX && (CPU_S3C2412 || CPU_S3C2443)
+	help
+	  Intel node to select io timing code that is common to the s3c2412
+	  and the s3c2443.
+
 # cpu-specific sections
 
 if CPU_S3C2410
diff --git a/arch/arm/mach-s3c24xx/Makefile b/arch/arm/mach-s3c24xx/Makefile
index 1d67582da41a..af53d27d5c36 100644
--- a/arch/arm/mach-s3c24xx/Makefile
+++ b/arch/arm/mach-s3c24xx/Makefile
@@ -14,7 +14,7 @@ obj-				:=
 
 # core
 
-obj-y				+= common.o
+obj-y				+= common.o irq.o
 
 obj-$(CONFIG_CPU_S3C2410)	+= s3c2410.o
 obj-$(CONFIG_S3C2410_CPUFREQ)	+= cpufreq-s3c2410.o
@@ -47,9 +47,21 @@ obj-$(CONFIG_PM)		+= pm.o irq-pm.o sleep.o
 
 # common code
 
+obj-$(CONFIG_S3C24XX_DCLK)	+= clock-dclk.o
+obj-$(CONFIG_S3C24XX_DMA)	+= dma.o
+
+obj-$(CONFIG_S3C2410_CLOCK)	+= clock-s3c2410.o
+obj-$(CONFIG_S3C2410_CPUFREQ_UTILS) += cpufreq-utils.o
+
+obj-$(CONFIG_S3C2410_IOTIMING)	+= iotiming-s3c2410.o
+obj-$(CONFIG_S3C2412_IOTIMING)	+= iotiming-s3c2412.o
+
 obj-$(CONFIG_S3C2443_COMMON)	+= common-s3c2443.o
 obj-$(CONFIG_S3C2443_DMA)	+= dma-s3c2443.o
 
+obj-$(CONFIG_CPU_FREQ_S3C24XX)	+= cpufreq.o
+obj-$(CONFIG_CPU_FREQ_S3C24XX_DEBUGFS) += cpufreq-debugfs.o
+
 #
 # machine support
 # following is ordered alphabetically by option text.
diff --git a/arch/arm/mach-s3c24xx/clock-dclk.c b/arch/arm/mach-s3c24xx/clock-dclk.c
new file mode 100644
index 000000000000..1edd9b2369c5
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/clock-dclk.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2004-2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * S3C24XX - definitions for DCLK and CLKOUT registers
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/clock.h>
+#include <plat/cpu.h>
+
+/* clocks that could be registered by external code */
+
+static int s3c24xx_dclk_enable(struct clk *clk, int enable)
+{
+	unsigned long dclkcon = __raw_readl(S3C24XX_DCLKCON);
+
+	if (enable)
+		dclkcon |= clk->ctrlbit;
+	else
+		dclkcon &= ~clk->ctrlbit;
+
+	__raw_writel(dclkcon, S3C24XX_DCLKCON);
+
+	return 0;
+}
+
+static int s3c24xx_dclk_setparent(struct clk *clk, struct clk *parent)
+{
+	unsigned long dclkcon;
+	unsigned int uclk;
+
+	if (parent == &clk_upll)
+		uclk = 1;
+	else if (parent == &clk_p)
+		uclk = 0;
+	else
+		return -EINVAL;
+
+	clk->parent = parent;
+
+	dclkcon = __raw_readl(S3C24XX_DCLKCON);
+
+	if (clk->ctrlbit == S3C2410_DCLKCON_DCLK0EN) {
+		if (uclk)
+			dclkcon |= S3C2410_DCLKCON_DCLK0_UCLK;
+		else
+			dclkcon &= ~S3C2410_DCLKCON_DCLK0_UCLK;
+	} else {
+		if (uclk)
+			dclkcon |= S3C2410_DCLKCON_DCLK1_UCLK;
+		else
+			dclkcon &= ~S3C2410_DCLKCON_DCLK1_UCLK;
+	}
+
+	__raw_writel(dclkcon, S3C24XX_DCLKCON);
+
+	return 0;
+}
+static unsigned long s3c24xx_calc_div(struct clk *clk, unsigned long rate)
+{
+	unsigned long div;
+
+	if ((rate == 0) || !clk->parent)
+		return 0;
+
+	div = clk_get_rate(clk->parent) / rate;
+	if (div < 2)
+		div = 2;
+	else if (div > 16)
+		div = 16;
+
+	return div;
+}
+
+static unsigned long s3c24xx_round_dclk_rate(struct clk *clk,
+	unsigned long rate)
+{
+	unsigned long div = s3c24xx_calc_div(clk, rate);
+
+	if (div == 0)
+		return 0;
+
+	return clk_get_rate(clk->parent) / div;
+}
+
+static int s3c24xx_set_dclk_rate(struct clk *clk, unsigned long rate)
+{
+	unsigned long mask, data, div = s3c24xx_calc_div(clk, rate);
+
+	if (div == 0)
+		return -EINVAL;
+
+	if (clk == &s3c24xx_dclk0) {
+		mask = S3C2410_DCLKCON_DCLK0_DIV_MASK |
+			S3C2410_DCLKCON_DCLK0_CMP_MASK;
+		data = S3C2410_DCLKCON_DCLK0_DIV(div) |
+			S3C2410_DCLKCON_DCLK0_CMP((div + 1) / 2);
+	} else if (clk == &s3c24xx_dclk1) {
+		mask = S3C2410_DCLKCON_DCLK1_DIV_MASK |
+			S3C2410_DCLKCON_DCLK1_CMP_MASK;
+		data = S3C2410_DCLKCON_DCLK1_DIV(div) |
+			S3C2410_DCLKCON_DCLK1_CMP((div + 1) / 2);
+	} else
+		return -EINVAL;
+
+	clk->rate = clk_get_rate(clk->parent) / div;
+	__raw_writel(((__raw_readl(S3C24XX_DCLKCON) & ~mask) | data),
+		S3C24XX_DCLKCON);
+	return clk->rate;
+}
+static int s3c24xx_clkout_setparent(struct clk *clk, struct clk *parent)
+{
+	unsigned long mask;
+	unsigned long source;
+
+	/* calculate the MISCCR setting for the clock */
+
+	if (parent == &clk_mpll)
+		source = S3C2410_MISCCR_CLK0_MPLL;
+	else if (parent == &clk_upll)
+		source = S3C2410_MISCCR_CLK0_UPLL;
+	else if (parent == &clk_f)
+		source = S3C2410_MISCCR_CLK0_FCLK;
+	else if (parent == &clk_h)
+		source = S3C2410_MISCCR_CLK0_HCLK;
+	else if (parent == &clk_p)
+		source = S3C2410_MISCCR_CLK0_PCLK;
+	else if (clk == &s3c24xx_clkout0 && parent == &s3c24xx_dclk0)
+		source = S3C2410_MISCCR_CLK0_DCLK0;
+	else if (clk == &s3c24xx_clkout1 && parent == &s3c24xx_dclk1)
+		source = S3C2410_MISCCR_CLK0_DCLK0;
+	else
+		return -EINVAL;
+
+	clk->parent = parent;
+
+	if (clk == &s3c24xx_clkout0)
+		mask = S3C2410_MISCCR_CLK0_MASK;
+	else {
+		source <<= 4;
+		mask = S3C2410_MISCCR_CLK1_MASK;
+	}
+
+	s3c2410_modify_misccr(mask, source);
+	return 0;
+}
+
+/* external clock definitions */
+
+static struct clk_ops dclk_ops = {
+	.set_parent	= s3c24xx_dclk_setparent,
+	.set_rate	= s3c24xx_set_dclk_rate,
+	.round_rate	= s3c24xx_round_dclk_rate,
+};
+
+struct clk s3c24xx_dclk0 = {
+	.name		= "dclk0",
+	.ctrlbit	= S3C2410_DCLKCON_DCLK0EN,
+	.enable	        = s3c24xx_dclk_enable,
+	.ops		= &dclk_ops,
+};
+
+struct clk s3c24xx_dclk1 = {
+	.name		= "dclk1",
+	.ctrlbit	= S3C2410_DCLKCON_DCLK1EN,
+	.enable		= s3c24xx_dclk_enable,
+	.ops		= &dclk_ops,
+};
+
+static struct clk_ops clkout_ops = {
+	.set_parent	= s3c24xx_clkout_setparent,
+};
+
+struct clk s3c24xx_clkout0 = {
+	.name		= "clkout0",
+	.ops		= &clkout_ops,
+};
+
+struct clk s3c24xx_clkout1 = {
+	.name		= "clkout1",
+	.ops		= &clkout_ops,
+};
diff --git a/arch/arm/mach-s3c24xx/clock-s3c2410.c b/arch/arm/mach-s3c24xx/clock-s3c2410.c
new file mode 100644
index 000000000000..641266f3d152
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/clock-s3c2410.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright (c) 2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410,S3C2440,S3C2442 Clock control support
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <asm/mach/map.h>
+
+#include <mach/hardware.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/s3c2410.h>
+#include <plat/clock.h>
+#include <plat/cpu.h>
+
+int s3c2410_clkcon_enable(struct clk *clk, int enable)
+{
+	unsigned int clocks = clk->ctrlbit;
+	unsigned long clkcon;
+
+	clkcon = __raw_readl(S3C2410_CLKCON);
+
+	if (enable)
+		clkcon |= clocks;
+	else
+		clkcon &= ~clocks;
+
+	/* ensure none of the special function bits set */
+	clkcon &= ~(S3C2410_CLKCON_IDLE|S3C2410_CLKCON_POWER);
+
+	__raw_writel(clkcon, S3C2410_CLKCON);
+
+	return 0;
+}
+
+static int s3c2410_upll_enable(struct clk *clk, int enable)
+{
+	unsigned long clkslow = __raw_readl(S3C2410_CLKSLOW);
+	unsigned long orig = clkslow;
+
+	if (enable)
+		clkslow &= ~S3C2410_CLKSLOW_UCLK_OFF;
+	else
+		clkslow |= S3C2410_CLKSLOW_UCLK_OFF;
+
+	__raw_writel(clkslow, S3C2410_CLKSLOW);
+
+	/* if we started the UPLL, then allow to settle */
+
+	if (enable && (orig & S3C2410_CLKSLOW_UCLK_OFF))
+		udelay(200);
+
+	return 0;
+}
+
+/* standard clock definitions */
+
+static struct clk init_clocks_off[] = {
+	{
+		.name		= "nand",
+		.parent		= &clk_h,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_NAND,
+	}, {
+		.name		= "sdi",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_SDI,
+	}, {
+		.name		= "adc",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_ADC,
+	}, {
+		.name		= "i2c",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_IIC,
+	}, {
+		.name		= "iis",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_IIS,
+	}, {
+		.name		= "spi",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_SPI,
+	}
+};
+
+static struct clk init_clocks[] = {
+	{
+		.name		= "lcd",
+		.parent		= &clk_h,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_LCDC,
+	}, {
+		.name		= "gpio",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_GPIO,
+	}, {
+		.name		= "usb-host",
+		.parent		= &clk_h,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_USBH,
+	}, {
+		.name		= "usb-device",
+		.parent		= &clk_h,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_USBD,
+	}, {
+		.name		= "timers",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_PWMT,
+	}, {
+		.name		= "uart",
+		.devname	= "s3c2410-uart.0",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART0,
+	}, {
+		.name		= "uart",
+		.devname	= "s3c2410-uart.1",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART1,
+	}, {
+		.name		= "uart",
+		.devname	= "s3c2410-uart.2",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_UART2,
+	}, {
+		.name		= "rtc",
+		.parent		= &clk_p,
+		.enable		= s3c2410_clkcon_enable,
+		.ctrlbit	= S3C2410_CLKCON_RTC,
+	}, {
+		.name		= "watchdog",
+		.parent		= &clk_p,
+		.ctrlbit	= 0,
+	}, {
+		.name		= "usb-bus-host",
+		.parent		= &clk_usb_bus,
+	}, {
+		.name		= "usb-bus-gadget",
+		.parent		= &clk_usb_bus,
+	},
+};
+
+/* s3c2410_baseclk_add()
+ *
+ * Add all the clocks used by the s3c2410 or compatible CPUs
+ * such as the S3C2440 and S3C2442.
+ *
+ * We cannot use a system device as we are needed before any
+ * of the init-calls that initialise the devices are actually
+ * done.
+*/
+
+int __init s3c2410_baseclk_add(void)
+{
+	unsigned long clkslow = __raw_readl(S3C2410_CLKSLOW);
+	unsigned long clkcon  = __raw_readl(S3C2410_CLKCON);
+	struct clk *clkp;
+	struct clk *xtal;
+	int ret;
+	int ptr;
+
+	clk_upll.enable = s3c2410_upll_enable;
+
+	if (s3c24xx_register_clock(&clk_usb_bus) < 0)
+		printk(KERN_ERR "failed to register usb bus clock\n");
+
+	/* register clocks from clock array */
+
+	clkp = init_clocks;
+	for (ptr = 0; ptr < ARRAY_SIZE(init_clocks); ptr++, clkp++) {
+		/* ensure that we note the clock state */
+
+		clkp->usage = clkcon & clkp->ctrlbit ? 1 : 0;
+
+		ret = s3c24xx_register_clock(clkp);
+		if (ret < 0) {
+			printk(KERN_ERR "Failed to register clock %s (%d)\n",
+			       clkp->name, ret);
+		}
+	}
+
+	/* We must be careful disabling the clocks we are not intending to
+	 * be using at boot time, as subsystems such as the LCD which do
+	 * their own DMA requests to the bus can cause the system to lockup
+	 * if they where in the middle of requesting bus access.
+	 *
+	 * Disabling the LCD clock if the LCD is active is very dangerous,
+	 * and therefore the bootloader should be careful to not enable
+	 * the LCD clock if it is not needed.
+	*/
+
+	/* install (and disable) the clocks we do not need immediately */
+
+	s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
+	s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
+
+	/* show the clock-slow value */
+
+	xtal = clk_get(NULL, "xtal");
+
+	printk("CLOCK: Slow mode (%ld.%ld MHz), %s, MPLL %s, UPLL %s\n",
+	       print_mhz(clk_get_rate(xtal) /
+			 ( 2 * S3C2410_CLKSLOW_GET_SLOWVAL(clkslow))),
+	       (clkslow & S3C2410_CLKSLOW_SLOW) ? "slow" : "fast",
+	       (clkslow & S3C2410_CLKSLOW_MPLL_OFF) ? "off" : "on",
+	       (clkslow & S3C2410_CLKSLOW_UCLK_OFF) ? "off" : "on");
+
+	s3c_pwmclk_init();
+	return 0;
+}
diff --git a/arch/arm/mach-s3c24xx/cpufreq-debugfs.c b/arch/arm/mach-s3c24xx/cpufreq-debugfs.c
new file mode 100644
index 000000000000..9b7b4289d66c
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/cpufreq-debugfs.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 2009 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX CPU Frequency scaling - debugfs status support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/cpufreq.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/err.h>
+
+#include <plat/cpu-freq-core.h>
+
+static struct dentry *dbgfs_root;
+static struct dentry *dbgfs_file_io;
+static struct dentry *dbgfs_file_info;
+static struct dentry *dbgfs_file_board;
+
+#define print_ns(x) ((x) / 10), ((x) % 10)
+
+static void show_max(struct seq_file *seq, struct s3c_freq *f)
+{
+	seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
+		   f->fclk, f->hclk, f->pclk, f->armclk);
+}
+
+static int board_show(struct seq_file *seq, void *p)
+{
+	struct s3c_cpufreq_config *cfg;
+	struct s3c_cpufreq_board *brd;
+
+	cfg = s3c_cpufreq_getconfig();
+	if (!cfg) {
+		seq_printf(seq, "no configuration registered\n");
+		return 0;
+	}
+
+	brd = cfg->board;
+	if (!brd) {
+		seq_printf(seq, "no board definition set?\n");
+		return 0;
+	}
+
+	seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
+	seq_printf(seq, "auto_io=%u\n", brd->auto_io);
+	seq_printf(seq, "need_io=%u\n", brd->need_io);
+
+	show_max(seq, &brd->max);
+
+
+	return 0;
+}
+
+static int fops_board_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, board_show, NULL);
+}
+
+static const struct file_operations fops_board = {
+	.open		= fops_board_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.owner		= THIS_MODULE,
+};
+
+static int info_show(struct seq_file *seq, void *p)
+{
+	struct s3c_cpufreq_config *cfg;
+
+	cfg = s3c_cpufreq_getconfig();
+	if (!cfg) {
+		seq_printf(seq, "no configuration registered\n");
+		return 0;
+	}
+
+	seq_printf(seq, "  FCLK %ld Hz\n", cfg->freq.fclk);
+	seq_printf(seq, "  HCLK %ld Hz (%lu.%lu ns)\n",
+		   cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
+	seq_printf(seq, "  PCLK %ld Hz\n", cfg->freq.hclk);
+	seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
+	seq_printf(seq, "\n");
+
+	show_max(seq, &cfg->max);
+
+	seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
+		   cfg->divs.h_divisor, cfg->divs.p_divisor,
+		   cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
+	seq_printf(seq, "\n");
+
+	seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
+
+	return 0;
+}
+
+static int fops_info_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, info_show, NULL);
+}
+
+static const struct file_operations fops_info = {
+	.open		= fops_info_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.owner		= THIS_MODULE,
+};
+
+static int io_show(struct seq_file *seq, void *p)
+{
+	void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
+	struct s3c_cpufreq_config *cfg;
+	struct s3c_iotimings *iot;
+	union s3c_iobank *iob;
+	int bank;
+
+	cfg = s3c_cpufreq_getconfig();
+	if (!cfg) {
+		seq_printf(seq, "no configuration registered\n");
+		return 0;
+	}
+
+	show_bank = cfg->info->debug_io_show;
+	if (!show_bank) {
+		seq_printf(seq, "no code to show bank timing\n");
+		return 0;
+	}
+
+	iot = s3c_cpufreq_getiotimings();
+	if (!iot) {
+		seq_printf(seq, "no io timings registered\n");
+		return 0;
+	}
+
+	seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
+
+	for (bank = 0; bank < MAX_BANKS; bank++) {
+		iob = &iot->bank[bank];
+
+		seq_printf(seq, "bank %d: ", bank);
+
+		if (!iob->io_2410) {
+			seq_printf(seq, "nothing set\n");
+			continue;
+		}
+
+		show_bank(seq, cfg, iob);
+	}
+
+	return 0;
+}
+
+static int fops_io_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, io_show, NULL);
+}
+
+static const struct file_operations fops_io = {
+	.open		= fops_io_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.owner		= THIS_MODULE,
+};
+
+
+static int __init s3c_freq_debugfs_init(void)
+{
+	dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
+	if (IS_ERR(dbgfs_root)) {
+		printk(KERN_ERR "%s: error creating debugfs root\n", __func__);
+		return PTR_ERR(dbgfs_root);
+	}
+
+	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
+					    NULL, &fops_io);
+
+	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
+					      NULL, &fops_info);
+
+	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
+					       NULL, &fops_board);
+
+	return 0;
+}
+
+late_initcall(s3c_freq_debugfs_init);
+
diff --git a/arch/arm/mach-s3c24xx/cpufreq-s3c2412.c b/arch/arm/mach-s3c24xx/cpufreq-s3c2412.c
index c8f05f309eee..8bf0f3a77476 100644
--- a/arch/arm/mach-s3c24xx/cpufreq-s3c2412.c
+++ b/arch/arm/mach-s3c24xx/cpufreq-s3c2412.c
@@ -25,12 +25,13 @@
 #include <asm/mach/map.h>
 
 #include <mach/regs-clock.h>
-#include <mach/regs-s3c2412-mem.h>
 
 #include <plat/cpu.h>
 #include <plat/clock.h>
 #include <plat/cpu-freq-core.h>
 
+#include "s3c2412.h"
+
 /* our clock resources. */
 static struct clk *xtal;
 static struct clk *fclk;
diff --git a/arch/arm/mach-s3c24xx/cpufreq-utils.c b/arch/arm/mach-s3c24xx/cpufreq-utils.c
new file mode 100644
index 000000000000..ddd8280e3875
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/cpufreq-utils.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2009 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX CPU Frequency scaling - utils for S3C2410/S3C2440/S3C2442
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.