Merge branch 'next-s3c24xx' into next-merged

26 files changed, 1072 insertions, 1534 deletions

diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig
index 7fe28aaa08c..0e07de2c9a9 100644
--- a/arch/arm/plat-s3c24xx/Kconfig
+++ b/arch/arm/plat-s3c24xx/Kconfig
@@ -15,6 +15,19 @@ config PLAT_S3C24XX
 
 if PLAT_S3C24XX
 
+# code that is shared between a number of the s3c24xx implementations
+
+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 CPU_S3C244X
 	bool
 	depends on ARCH_S3C2410 && (CPU_S3C2440 || CPU_S3C2442)
@@ -70,6 +83,29 @@ config S3C2410_DMA_DEBUG
 	  Enable debugging output for the DMA code. This option sends info
 	  to the kernel log, at priority KERN_DEBUG.
 
+config S3C24XX_ADC
+	bool "ADC common driver support"
+	help
+	  Core support for the ADC block found in the S3C24XX SoC systems
+	  for drivers such as the touchscreen and hwmon to use to share
+	  this resource.
+
+# SPI default pin configuration code
+
+config S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13
+	bool
+	help
+	  SPI GPIO configuration code for BUS0 when connected to
+	  GPE11, GPE12 and GPE13.
+
+config S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7
+	bool
+	help
+	  SPI GPIO configuration code for BUS 1 when connected to
+	  GPG5, GPG6 and GPG7.
+
+# common code for s3c24xx based machines, such as the SMDKs.
+
 config MACH_SMDK
 	bool
 	help
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index d82767b2b83..a8cfdefc29e 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -17,9 +17,8 @@ obj-y				+= irq.o
 obj-y				+= devs.o
 obj-y				+= gpio.o
 obj-y				+= gpiolib.o
-obj-y				+= time.o
 obj-y				+= clock.o
-obj-y				+= pwm-clock.o
+obj-$(CONFIG_S3C24XX_DCLK)	+= clock-dclk.o
 
 # Architecture dependant builds
 
@@ -30,5 +29,15 @@ obj-$(CONFIG_PM_SIMTEC)		+= pm-simtec.o
 obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_PM)		+= sleep.o
 obj-$(CONFIG_HAVE_PWM)		+= pwm.o
+obj-$(CONFIG_S3C2410_CLOCK)	+= s3c2410-clock.o
 obj-$(CONFIG_S3C2410_DMA)	+= dma.o
+obj-$(CONFIG_S3C24XX_ADC)	+= adc.o
+
+# SPI gpio central GPIO functions
+
+obj-$(CONFIG_S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13) += spi-bus0-gpe11_12_13.o
+obj-$(CONFIG_S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7)    += spi-bus1-gpg5_6_7.o
+
+# machine common support
+
 obj-$(CONFIG_MACH_SMDK)		+= common-smdk.o
diff --git a/arch/arm/plat-s3c24xx/adc.c b/arch/arm/plat-s3c24xx/adc.c
new file mode 100644
index 00000000000..9a5c767e0a4
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/adc.c
@@ -0,0 +1,372 @@
+/* arch/arm/plat-s3c24xx/adc.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
+ *
+ * S3C24XX ADC device core
+ *
+ * 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.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <plat/regs-adc.h>
+#include <plat/adc.h>
+
+/* This driver is designed to control the usage of the ADC block between
+ * the touchscreen and any other drivers that may need to use it, such as
+ * the hwmon driver.
+ *
+ * Priority will be given to the touchscreen driver, but as this itself is
+ * rate limited it should not starve other requests which are processed in
+ * order that they are received.
+ *
+ * Each user registers to get a client block which uniquely identifies it
+ * and stores information such as the necessary functions to callback when
+ * action is required.
+ */
+
+struct s3c_adc_client {
+	struct platform_device	*pdev;
+	struct list_head	 pend;
+
+	unsigned int		 nr_samples;
+	unsigned char		 is_ts;
+	unsigned char		 channel;
+
+	void	(*select_cb)(unsigned selected);
+	void	(*convert_cb)(unsigned val1, unsigned val2);
+};
+
+struct adc_device {
+	struct platform_device	*pdev;
+	struct platform_device	*owner;
+	struct clk		*clk;
+	struct s3c_adc_client	*cur;
+	struct s3c_adc_client	*ts_pend;
+	void __iomem		*regs;
+
+	unsigned int		 prescale;
+
+	int			 irq;
+};
+
+static struct adc_device *adc_dev;
+
+static LIST_HEAD(adc_pending);
+
+#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
+
+static inline void s3c_adc_convert(struct adc_device *adc)
+{
+	unsigned con = readl(adc->regs + S3C2410_ADCCON);
+
+	con |= S3C2410_ADCCON_ENABLE_START;
+	writel(con, adc->regs + S3C2410_ADCCON);
+}
+
+static inline void s3c_adc_select(struct adc_device *adc,
+				  struct s3c_adc_client *client)
+{
+	unsigned con = readl(adc->regs + S3C2410_ADCCON);
+
+	client->select_cb(1);
+
+	con &= ~S3C2410_ADCCON_MUXMASK;
+	con &= ~S3C2410_ADCCON_STDBM;
+	con &= ~S3C2410_ADCCON_STARTMASK;
+
+	if (!client->is_ts)
+		con |= S3C2410_ADCCON_SELMUX(client->channel);
+
+	writel(con, adc->regs + S3C2410_ADCCON);
+}
+
+static void s3c_adc_dbgshow(struct adc_device *adc)
+{
+	adc_dbg(adc, "CON=%08x, TSC=%08x, DLY=%08x\n",
+		readl(adc->regs + S3C2410_ADCCON),
+		readl(adc->regs + S3C2410_ADCTSC),
+		readl(adc->regs + S3C2410_ADCDLY));
+}
+
+void s3c_adc_try(struct adc_device *adc)
+{
+	struct s3c_adc_client *next = adc->ts_pend;
+
+	if (!next && !list_empty(&adc_pending)) {
+		next = list_first_entry(&adc_pending,
+					struct s3c_adc_client, pend);
+		list_del(&next->pend);
+	} else
+		adc->ts_pend = NULL;
+
+	if (next) {
+		adc_dbg(adc, "new client is %p\n", next);
+		adc->cur = next;
+		s3c_adc_select(adc, next);
+		s3c_adc_convert(adc);
+		s3c_adc_dbgshow(adc);
+	}
+}
+
+int s3c_adc_start(struct s3c_adc_client *client,
+		  unsigned int channel, unsigned int nr_samples)
+{
+	struct adc_device *adc = adc_dev;
+	unsigned long flags;
+
+	if (!adc) {
+		printk(KERN_ERR "%s: failed to find adc\n", __func__);
+		return -EINVAL;
+	}
+
+	if (client->is_ts && adc->ts_pend)
+		return -EAGAIN;
+
+	local_irq_save(flags);
+
+	client->channel = channel;
+	client->nr_samples = nr_samples;
+
+	if (client->is_ts)
+		adc->ts_pend = client;
+	else
+		list_add_tail(&client->pend, &adc_pending);
+
+	if (!adc->cur)
+		s3c_adc_try(adc);
+	local_irq_restore(flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(s3c_adc_start);
+
+static void s3c_adc_default_select(unsigned select)
+{
+}
+
+struct s3c_adc_client *s3c_adc_register(struct platform_device *pdev,
+					void (*select)(unsigned int selected),
+					void (*conv)(unsigned d0, unsigned d1),
+					unsigned int is_ts)
+{
+	struct s3c_adc_client *client;
+
+	WARN_ON(!pdev);
+	WARN_ON(!conv);
+
+	if (!select)
+		select = s3c_adc_default_select;
+
+	if (!conv || !pdev)
+		return ERR_PTR(-EINVAL);
+
+	client = kzalloc(sizeof(struct s3c_adc_client), GFP_KERNEL);
+	if (!client) {
+		dev_err(&pdev->dev, "no memory for adc client\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	client->pdev = pdev;
+	client->is_ts = is_ts;
+	client->select_cb = select;
+	client->convert_cb = conv;
+
+	return client;
+}
+EXPORT_SYMBOL_GPL(s3c_adc_register);
+
+void s3c_adc_release(struct s3c_adc_client *client)
+{
+	/* We should really check that nothing is in progress. */
+	kfree(client);
+}
+EXPORT_SYMBOL_GPL(s3c_adc_release);
+
+static irqreturn_t s3c_adc_irq(int irq, void *pw)
+{
+	struct adc_device *adc = pw;
+	struct s3c_adc_client *client = adc->cur;
+	unsigned long flags;
+	unsigned data0, data1;
+
+	if (!client) {
+		dev_warn(&adc->pdev->dev, "%s: no adc pending\n", __func__);
+		return IRQ_HANDLED;
+	}
+
+	data0 = readl(adc->regs + S3C2410_ADCDAT0);
+	data1 = readl(adc->regs + S3C2410_ADCDAT1);
+	adc_dbg(adc, "read %d: 0x%04x, 0x%04x\n", client->nr_samples, data0, data1);
+
+	(client->convert_cb)(data0 & 0x3ff, data1 & 0x3ff);
+
+	if (--client->nr_samples > 0) {
+		/* fire another conversion for this */
+
+		client->select_cb(1);
+		s3c_adc_convert(adc);
+	} else {
+		local_irq_save(flags);
+		(client->select_cb)(0);
+		adc->cur = NULL;
+
+		s3c_adc_try(adc);
+		local_irq_restore(flags);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int s3c_adc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct adc_device *adc;
+	struct resource *regs;
+	int ret;
+
+	adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL);
+	if (adc == NULL) {
+		dev_err(dev, "failed to allocate adc_device\n");
+		return -ENOMEM;
+	}
+
+	adc->pdev = pdev;
+	adc->prescale = S3C2410_ADCCON_PRSCVL(49);
+
+	adc->irq = platform_get_irq(pdev, 1);
+	if (adc->irq <= 0) {
+		dev_err(dev, "failed to get adc irq\n");
+		ret = -ENOENT;
+		goto err_alloc;
+	}
+
+	ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc);
+	if (ret < 0) {
+		dev_err(dev, "failed to attach adc irq\n");
+		goto err_alloc;
+	}
+
+	adc->clk = clk_get(dev, "adc");
+	if (IS_ERR(adc->clk)) {
+		dev_err(dev, "failed to get adc clock\n");
+		ret = PTR_ERR(adc->clk);
+		goto err_irq;
+	}
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!regs) {
+		dev_err(dev, "failed to find registers\n");
+		ret = -ENXIO;
+		goto err_clk;
+	}
+
+	adc->regs = ioremap(regs->start, resource_size(regs));
+	if (!adc->regs) {
+		dev_err(dev, "failed to map registers\n");
+		ret = -ENXIO;
+		goto err_clk;
+	}
+
+	clk_enable(adc->clk);
+
+	writel(adc->prescale | S3C2410_ADCCON_PRSCEN,
+	       adc->regs + S3C2410_ADCCON);
+
+	dev_info(dev, "attached adc driver\n");
+
+	platform_set_drvdata(pdev, adc);
+	adc_dev = adc;
+
+	return 0;
+
+ err_clk:
+	clk_put(adc->clk);
+
+ err_irq:
+	free_irq(adc->irq, adc);
+
+ err_alloc:
+	kfree(adc);
+	return ret;
+}
+
+static int s3c_adc_remove(struct platform_device *pdev)
+{
+	struct adc_device *adc = platform_get_drvdata(pdev);
+
+	iounmap(adc->regs);
+	free_irq(adc->irq, adc);
+	clk_disable(adc->clk);
+	clk_put(adc->clk);
+	kfree(adc);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct adc_device *adc = platform_get_drvdata(pdev);
+	u32 con;
+
+	con = readl(adc->regs + S3C2410_ADCCON);
+	con |= S3C2410_ADCCON_STDBM;
+	writel(con, adc->regs + S3C2410_ADCCON);
+
+	clk_disable(adc->clk);
+
+	return 0;
+}
+
+static int s3c_adc_resume(struct platform_device *pdev)
+{
+	struct adc_device *adc = platform_get_drvdata(pdev);
+
+	clk_enable(adc->clk);
+
+	writel(adc->prescale | S3C2410_ADCCON_PRSCEN,
+	       adc->regs + S3C2410_ADCCON);
+
+	return 0;
+}
+
+#else
+#define s3c_adc_suspend NULL
+#define s3c_adc_resume NULL
+#endif
+
+static struct platform_driver s3c_adc_driver = {
+	.driver		= {
+		.name	= "s3c24xx-adc",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= s3c_adc_probe,
+	.remove		= __devexit_p(s3c_adc_remove),
+	.suspend	= s3c_adc_suspend,
+	.resume		= s3c_adc_resume,
+};
+
+static int __init adc_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&s3c_adc_driver);
+	if (ret)
+		printk(KERN_ERR "%s: failed to add adc driver\n", __func__);
+
+	return ret;
+}
+
+arch_initcall(adc_init);
diff --git a/arch/arm/plat-s3c24xx/clock-dclk.c b/arch/arm/plat-s3c24xx/clock-dclk.c
new file mode 100644
index 00000000000..5b75a797b5a
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/clock-dclk.c
@@ -0,0 +1,194 @@
+/* linux/arch/arm/plat-s3c24xx/clock-dclk.c
+ *
+ * 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_xtal)
+		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 */
+
+struct clk s3c24xx_dclk0 = {
+	.name		= "dclk0",
+	.id		= -1,
+	.ctrlbit	= S3C2410_DCLKCON_DCLK0EN,
+	.enable	        = s3c24xx_dclk_enable,
+	.set_parent	= s3c24xx_dclk_setparent,
+	.set_rate	= s3c24xx_set_dclk_rate,
+	.round_rate	= s3c24xx_round_dclk_rate,
+};
+
+struct clk s3c24xx_dclk1 = {
+	.name		= "dclk1",
+	.id		= -1,
+	.ctrlbit	= S3C2410_DCLKCON_DCLK1EN,
+	.enable		= s3c24xx_dclk_enable,
+	.set_parent	= s3c24xx_dclk_setparent,
+	.set_rate	= s3c24xx_set_dclk_rate,
+	.round_rate	= s3c24xx_round_dclk_rate,
+};
+
+struct clk s3c24xx_clkout0 = {
+	.name		= "clkout0",
+	.id		= -1,
+	.set_parent	= s3c24xx_clkout_setparent,
+};
+
+struct clk s3c24xx_clkout1 = {
+	.name		= "clkout1",
+	.id		= -1,
+	.set_parent	= s3c24xx_clkout_setparent,
+};
diff --git a/arch/arm/plat-s3c24xx/clock.c b/arch/arm/plat-s3c24xx/clock.c
index a005ddbd9ef..8474d05274b 100644
--- a/arch/arm/plat-s3c24xx/clock.c
+++ b/arch/arm/plat-s3c24xx/clock.c
@@ -27,18 +27,8 @@
 */
 
 #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/platform_device.h>
-#include <linux/sysdev.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
 #include <linux/clk.h>
-#include <linux/mutex.h>
-#include <linux/delay.h>
 #include <linux/io.h>
 
 #include <mach/hardware.h>
@@ -47,490 +37,23 @@
 #include <mach/regs-clock.h>
 #include <mach/regs-gpio.h>
 
+#include <plat/cpu-freq.h>
+
 #include <plat/clock.h>
 #include <plat/cpu.h>
-
-/* clock information */
-
-static LIST_HEAD(clocks);
-
-DEFINE_MUTEX(clocks_mutex);
-
-/* enable and disable calls for use with the clk struct */
-
-static int clk_null_enable(struct clk *clk, int enable)
-{
-	return 0;
-}
-
-/* Clock API calls */
-
-struct clk *clk_get(struct device *dev, const char *id)
-{
-	struct clk *p;
-	struct clk *clk = ERR_PTR(-ENOENT);
-	int idno;
-
-	if (dev == NULL || dev->bus != &platform_bus_type)
-		idno = -1;
-	else
-		idno = to_platform_device(dev)->id;
-
-	mutex_lock(&clocks_mutex);
-
-	list_for_each_entry(p, &clocks, list) {
-		if (p->id == idno &&
-		    strcmp(id, p->name) == 0 &&
-		    try_module_get(p->owner)) {
-			clk = p;
-			break;
-		}
-	}
-
-	/* check for the case where a device was supplied, but the
-	 * clock that was being searched for is not device specific */
-
-	if (IS_ERR(clk)) {
-		list_for_each_entry(p, &clocks, list) {
-			if (p->id == -1 && strcmp(id, p->name) == 0 &&
-			    try_module_get(p->owner)) {
-				clk = p;
-				break;
-			}
-		}
-	}
-
-	mutex_unlock(&clocks_mutex);
-	return clk;
-}
-
-void clk_put(struct clk *clk)
-{
-	module_put(clk->owner);
-}
-
-int clk_enable(struct clk *clk)
-{
-	if (IS_ERR(clk) || clk == NULL)
-		return -EINVAL;
-
-	clk_enable(clk->parent);
-
-	mutex_lock(&clocks_mutex);
-
-	if ((clk->usage++) == 0)
-		(clk->enable)(clk, 1);
-
-	mutex_unlock(&clocks_mutex);
-	return 0;
-}
-
-void clk_disable(struct clk *clk)
-{
-	if (IS_ERR(clk) || clk == NULL)
-		return;
-
-	mutex_lock(&clocks_mutex);
-
-	if ((--clk->usage) == 0)
-		(clk->enable)(clk, 0);
-
-	mutex_unlock(&clocks_mutex);
-	clk_disable(clk->parent);
-}
-
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	if (IS_ERR(clk))
-		return 0;
-
-	if (clk->rate != 0)
-		return clk->rate;
-
-	if (clk->get_rate != NULL)
-		return (clk->get_rate)(clk);
-
-	if (clk->parent != NULL)
-		return clk_get_rate(clk->parent);
-
-	return clk->rate;
-}
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
-	if (!IS_ERR(clk) && clk->round_rate)
-		return (clk->round_rate)(clk, rate);
-
-	return rate;
-}
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
-	int ret;
-
-	if (IS_ERR(clk))
-		return -EINVAL;
-
-	/* We do not default just do a clk->rate = rate as
-	 * the clock may have been made this way by choice.
-	 */
-
-	WARN_ON(clk->set_rate == NULL);
-
-	if (clk->set_rate == NULL)
-		return -EINVAL;
-
-	mutex_lock(&clocks_mutex);
-	ret = (clk->set_rate)(clk, rate);
-	mutex_unlock(&clocks_mutex);
-
-	return ret;
-}
-
-struct clk *clk_get_parent(struct clk *clk)
-{
-	return clk->parent;
-}
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
-	int ret = 0;
-
-	if (IS_ERR(clk))
-		return -EINVAL;
-
-	mutex_lock(&clocks_mutex);
-
-	if (clk->set_parent)
-		ret = (clk->set_parent)(clk, parent);
-
-	mutex_unlock(&clocks_mutex);
-
-	return ret;
-}
-
-EXPORT_SYMBOL(clk_get);
-EXPORT_SYMBOL(clk_put);
-EXPORT_SYMBOL(clk_enable);
-EXPORT_SYMBOL(clk_disable);
-EXPORT_SYMBOL(clk_get_rate);
-EXPORT_SYMBOL(clk_round_rate);
-EXPORT_SYMBOL(clk_set_rate);
-EXPORT_SYMBOL(clk_get_parent);
-EXPORT_SYMBOL(clk_set_parent);
-
-/* base clocks */
-
-static int clk_default_setrate(struct clk *clk, unsigned long rate)
-{
-	clk->rate = rate;
-	return 0;
-}
-
-struct clk clk_xtal = {
-	.name		= "xtal",
-	.id		= -1,
-	.rate		= 0,
-	.parent		= NULL,
-	.ctrlbit	= 0,
-};
-
-struct clk clk_mpll = {
-	.name		= "mpll",
-	.id		= -1,
-	.set_rate	= clk_default_setrate,
-};
-
-struct clk clk_upll = {
-	.name		= "upll",
-	.id		= -1,
-	.parent		= NULL,
-	.ctrlbit	= 0,
-};
-
-struct clk clk_f = {
-	.name		= "fclk",
-	.id		= -1,
-	.rate		= 0,
-	.parent		= &clk_mpll,
-	.ctrlbit	= 0,
-	.set_rate	= clk_default_setrate,
-};
-
-struct clk clk_h = {
-	.name		= "hclk",
-	.id		= -1,
-	.rate		= 0,
-	.parent		= NULL,
-	.ctrlbit	= 0,
-	.set_rate	= clk_default_setrate,
-};
-
-struct clk clk_p = {
-	.name		= "pclk",
-	.id		= -1,
-	.rate		= 0,
-	.parent		= NULL,
-	.ctrlbit	= 0,
-	.set_rate	= clk_default_setrate,
-};
-
-struct clk clk_usb_bus = {
-	.name		= "usb-bus",
-	.id		= -1,
-	.rate		= 0,
-	.parent		= &clk_upll,
-};
-
-/* 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 *