From: Ben Dooks <ben-linux@fluff.org>
Date: Tue, 21 Oct 2008 13:06:54 +0000 (+0100)
Subject: [ARM] S3C: Move core clock support to plat-s3c
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=adbefaa5fdc6673bf389c00c3448b12d6125990b;p=linux-beck.git

[ARM] S3C: Move core clock support to plat-s3c

Move the core clock registration and definitions
in arch/arm/plat-s3c24xx/clock.c to arch/arm/plat-s3c
to be shared with the S3C64XX implementations.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---

diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index 3c543ed5fb97..51e7ed5c5c93 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -13,3 +13,4 @@ obj-				:=
 
 obj-y				+=  init.o
 obj-y				+= time.o
+obj-y				+= clock.o
\ No newline at end of file
diff --git a/arch/arm/plat-s3c/clock.c b/arch/arm/plat-s3c/clock.c
new file mode 100644
index 000000000000..35249b58f383
--- /dev/null
+++ b/arch/arm/plat-s3c/clock.c
@@ -0,0 +1,356 @@
+/* linux/arch/arm/plat-s3c24xx/clock.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX Core clock control support
+ *
+ * Based on, and code from linux/arch/arm/mach-versatile/clock.c
+ **
+ **  Copyright (C) 2004 ARM Limited.
+ **  Written by Deep Blue Solutions Limited.
+ *
+ *
+ * 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/platform_device.h>
+#include <linux/sysdev.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.h>
+
+#include <plat/cpu-freq.h>
+
+#include <plat/clock.h>
+#include <plat/cpu.h>
+
+/* clock information */
+
+static LIST_HEAD(clocks);
+
+/* We originally used an mutex here, but some contexts (see resume)
+ * are calling functions such as clk_set_parent() with IRQs disabled
+ * causing an BUG to be triggered.
+ */
+DEFINE_SPINLOCK(clocks_lock);
+
+/* 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;
+
+	spin_lock(&clocks_lock);
+
+	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;
+			}
+		}
+	}
+
+	spin_unlock(&clocks_lock);
+	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);
+
+	spin_lock(&clocks_lock);
+
+	if ((clk->usage++) == 0)
+		(clk->enable)(clk, 1);
+
+	spin_unlock(&clocks_lock);
+	return 0;
+}
+
+void clk_disable(struct clk *clk)
+{
+	if (IS_ERR(clk) || clk == NULL)
+		return;
+
+	spin_lock(&clocks_lock);
+
+	if ((--clk->usage) == 0)
+		(clk->enable)(clk, 0);
+
+	spin_unlock(&clocks_lock);
+	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;
+
+	spin_lock(&clocks_lock);
+	ret = (clk->set_rate)(clk, rate);
+	spin_unlock(&clocks_lock);
+
+	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;
+
+	spin_lock(&clocks_lock);
+
+	if (clk->set_parent)
+		ret = (clk->set_parent)(clk, parent);
+
+	spin_unlock(&clocks_lock);
+
+	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,
+};
+
+
+
+struct clk s3c24xx_uclk = {
+	.name		= "uclk",
+	.id		= -1,
+};
+
+/* initialise the clock system */
+
+int s3c24xx_register_clock(struct clk *clk)
+{
+	clk->owner = THIS_MODULE;
+
+	if (clk->enable == NULL)
+		clk->enable = clk_null_enable;
+
+	/* add to the list of available clocks */
+
+	spin_lock(&clocks_lock);
+	list_add(&clk->list, &clocks);
+	spin_unlock(&clocks_lock);
+
+	return 0;
+}
+
+int s3c24xx_register_clocks(struct clk **clks, int nr_clks)
+{
+	int fails = 0;
+
+	for (; nr_clks > 0; nr_clks--, clks++) {
+		if (s3c24xx_register_clock(*clks) < 0)
+			fails++;
+	}
+
+	return fails;
+}
+
+/* initalise all the clocks */
+
+int __init s3c24xx_register_baseclocks(unsigned long xtal)
+{
+	printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n");
+
+	clk_xtal.rate = xtal;
+
+	/* register our clocks */
+
+	if (s3c24xx_register_clock(&clk_xtal) < 0)
+		printk(KERN_ERR "failed to register master xtal\n");
+
+	if (s3c24xx_register_clock(&clk_mpll) < 0)
+		printk(KERN_ERR "failed to register mpll clock\n");
+
+	if (s3c24xx_register_clock(&clk_upll) < 0)
+		printk(KERN_ERR "failed to register upll clock\n");
+
+	if (s3c24xx_register_clock(&clk_f) < 0)
+		printk(KERN_ERR "failed to register cpu fclk\n");
+
+	if (s3c24xx_register_clock(&clk_h) < 0)
+		printk(KERN_ERR "failed to register cpu hclk\n");
+
+	if (s3c24xx_register_clock(&clk_p) < 0)
+		printk(KERN_ERR "failed to register cpu pclk\n");
+
+	return 0;
+}
+
diff --git a/arch/arm/plat-s3c24xx/clock.c b/arch/arm/plat-s3c24xx/clock.c
index a4a0a67a3074..8474d05274bd 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/spinlock.h>
-#include <linux/delay.h>
 #include <linux/io.h>
 
 #include <mach/hardware.h>
@@ -53,280 +43,6 @@
 #include <plat/cpu.h>
 #include <plat/pll.h>
 
-/* clock information */
-
-static LIST_HEAD(clocks);
-
-/* We originally used an mutex here, but some contexts (see resume)
- * are calling functions such as clk_set_parent() with IRQs disabled
- * causing an BUG to be triggered.
- */
-DEFINE_SPINLOCK(clocks_lock);
-
-/* 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;
-
-	spin_lock(&clocks_lock);
-
-	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;
-			}
-		}
-	}
-
-	spin_unlock(&clocks_lock);
-	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);
-
-	spin_lock(&clocks_lock);
-
-	if ((clk->usage++) == 0)
-		(clk->enable)(clk, 1);
-
-	spin_unlock(&clocks_lock);
-	return 0;
-}
-
-void clk_disable(struct clk *clk)
-{
-	if (IS_ERR(clk) || clk == NULL)
-		return;
-
-	spin_lock(&clocks_lock);
-
-	if ((--clk->usage) == 0)
-		(clk->enable)(clk, 0);
-
-	spin_unlock(&clocks_lock);
-	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;
-
-	spin_lock(&clocks_lock);
-	ret = (clk->set_rate)(clk, rate);
-	spin_unlock(&clocks_lock);
-
-	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;
-
-	spin_lock(&clocks_lock);
-
-	if (clk->set_parent)
-		ret = (clk->set_parent)(clk, parent);
-
-	spin_unlock(&clocks_lock);
-
-	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,
-};
-
-
-
-struct clk s3c24xx_uclk = {
-	.name		= "uclk",
-	.id		= -1,
-};
-
-/* initialise the clock system */
-
-int s3c24xx_register_clock(struct clk *clk)
-{
-	clk->owner = THIS_MODULE;
-
-	if (clk->enable == NULL)
-		clk->enable = clk_null_enable;
-
-	/* add to the list of available clocks */
-
-	spin_lock(&clocks_lock);
-	list_add(&clk->list, &clocks);
-	spin_unlock(&clocks_lock);
-
-	return 0;
-}
-
-int s3c24xx_register_clocks(struct clk **clks, int nr_clks)
-{
-	int fails = 0;
-
-	for (; nr_clks > 0; nr_clks--, clks++) {
-		if (s3c24xx_register_clock(*clks) < 0)
-			fails++;
-	}
-
-	return fails;
-}
-
 /* initalise all the clocks */
 
 void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk,
@@ -341,33 +57,3 @@ void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk,
 	clk_p.rate = pclk;
 	clk_f.rate = fclk;
 }
-
-int __init s3c24xx_register_baseclocks(unsigned long xtal)
-{
-	printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n");
-
-	clk_xtal.rate = xtal;
-
-	/* register our clocks */
-
-	if (s3c24xx_register_clock(&clk_xtal) < 0)
-		printk(KERN_ERR "failed to register master xtal\n");
-
-	if (s3c24xx_register_clock(&clk_mpll) < 0)
-		printk(KERN_ERR "failed to register mpll clock\n");
-
-	if (s3c24xx_register_clock(&clk_upll) < 0)
-		printk(KERN_ERR "failed to register upll clock\n");
-
-	if (s3c24xx_register_clock(&clk_f) < 0)
-		printk(KERN_ERR "failed to register cpu fclk\n");
-
-	if (s3c24xx_register_clock(&clk_h) < 0)
-		printk(KERN_ERR "failed to register cpu hclk\n");
-
-	if (s3c24xx_register_clock(&clk_p) < 0)
-		printk(KERN_ERR "failed to register cpu pclk\n");
-
-	return 0;
-}
-