1 files changed, 37 insertions, 94 deletions

diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c
index 7728928..40454d7 100644
--- a/arch/arm/plat-samsung/clock.c
+++ b/arch/arm/plat-samsung/clock.c
@@ -27,7 +27,6 @@
 */
 
 #include <linux/init.h>
-#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/errno.h>
@@ -64,108 +63,55 @@ static LIST_HEAD(clocks);
  */
 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;
-}
-
-static int dev_is_s3c_uart(struct device *dev)
+/* Global watchdog clock used by arch_wtd_reset() callback */
+struct clk *s3c2410_wdtclk;
+static int __init s3c_wdt_reset_init(void)
 {
-	struct platform_device **pdev = s3c24xx_uart_devs;
-	int i;
-	for (i = 0; i < ARRAY_SIZE(s3c24xx_uart_devs); i++, pdev++)
-		if (*pdev && dev == &(*pdev)->dev)
-			return 1;
+	s3c2410_wdtclk = clk_get(NULL, "watchdog");
+	if (IS_ERR(s3c2410_wdtclk))
+		printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
 	return 0;
 }
+arch_initcall(s3c_wdt_reset_init);
 
-/*
- * Serial drivers call get_clock() very early, before platform bus
- * has been set up, this requires a special check to let them get
- * a proper clock
- */
-
-static int dev_is_platform_device(struct device *dev)
-{
-	return dev->bus == &platform_bus_type ||
-	       (dev->bus == NULL && dev_is_s3c_uart(dev));
-}
-
-/* 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_is_platform_device(dev))
-		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;
-}
+/* enable and disable calls for use with the clk struct */
 
-void clk_put(struct clk *clk)
+static int clk_null_enable(struct clk *clk, int enable)
 {
-	module_put(clk->owner);
+	return 0;
 }
 
 int clk_enable(struct clk *clk)
 {
+	unsigned long flags;
+
 	if (IS_ERR(clk) || clk == NULL)
 		return -EINVAL;
 
 	clk_enable(clk->parent);
 
-	spin_lock(&clocks_lock);
+	spin_lock_irqsave(&clocks_lock, flags);
 
 	if ((clk->usage++) == 0)
 		(clk->enable)(clk, 1);
 
-	spin_unlock(&clocks_lock);
+	spin_unlock_irqrestore(&clocks_lock, flags);
 	return 0;
 }
 
 void clk_disable(struct clk *clk)
 {
+	unsigned long flags;
+
 	if (IS_ERR(clk) || clk == NULL)
 		return;
 
-	spin_lock(&clocks_lock);
+	spin_lock_irqsave(&clocks_lock, flags);
 
 	if ((--clk->usage) == 0)
 		(clk->enable)(clk, 0);
 
-	spin_unlock(&clocks_lock);
+	spin_unlock_irqrestore(&clocks_lock, flags);
 	clk_disable(clk->parent);
 }
 
@@ -197,6 +143,7 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
 
 int clk_set_rate(struct clk *clk, unsigned long rate)
 {
+	unsigned long flags;
 	int ret;
 
 	if (IS_ERR(clk))
@@ -212,9 +159,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
 	if (clk->ops == NULL || clk->ops->set_rate == NULL)
 		return -EINVAL;
 
-	spin_lock(&clocks_lock);
+	spin_lock_irqsave(&clocks_lock, flags);
 	ret = (clk->ops->set_rate)(clk, rate);
-	spin_unlock(&clocks_lock);
+	spin_unlock_irqrestore(&clocks_lock, flags);
 
 	return ret;
 }
@@ -226,23 +173,22 @@ struct clk *clk_get_parent(struct clk *clk)
 
 int clk_set_parent(struct clk *clk, struct clk *parent)
 {
+	unsigned long flags;
 	int ret = 0;
 
 	if (IS_ERR(clk))
 		return -EINVAL;
 
-	spin_lock(&clocks_lock);
+	spin_lock_irqsave(&clocks_lock, flags);
 
 	if (clk->ops && clk->ops->set_parent)
 		ret = (clk->ops->set_parent)(clk, parent);
 
-	spin_unlock(&clocks_lock);
+	spin_unlock_irqrestore(&clocks_lock, flags);
 
 	return ret;
 }
 
-EXPORT_SYMBOL(clk_get);
-EXPORT_SYMBOL(clk_put);
 EXPORT_SYMBOL(clk_enable);
 EXPORT_SYMBOL(clk_disable);
 EXPORT_SYMBOL(clk_get_rate);
@@ -343,17 +289,20 @@ struct clk s3c24xx_uclk = {
  */
 int s3c24xx_register_clock(struct clk *clk)
 {
+	unsigned long flags;
+
 	if (clk->enable == NULL)
 		clk->enable = clk_null_enable;
 
-	/* add to the list of available clocks */
+	/* fill up the clk_lookup structure and register it*/
+	clk->lookup.dev_id = clk->devname;
+	clk->lookup.con_id = clk->name;
+	clk->lookup.clk = clk;
+	clkdev_add(&clk->lookup);
 
-	/* Quick check to see if this clock has already been registered. */
-	BUG_ON(clk->list.prev != clk->list.next);
-
-	spin_lock(&clocks_lock);
-	list_add(&clk->list, &clocks);
-	spin_unlock(&clocks_lock);
+	spin_lock_irqsave(&clocks_lock, flags);
+	list_add_tail(&clk->list, &clocks);
+	spin_unlock_irqrestore(&clocks_lock, flags);
 
 	return 0;
 }
@@ -458,15 +407,12 @@ static struct dentry *clk_debugfs_root;
 static int clk_debugfs_register_one(struct clk *c)
 {
 	int err;
-	struct dentry *d, *child, *child_tmp;
+	struct dentry *d;
 	struct clk *pa = c->parent;
 	char s[255];
 	char *p = s;
 
-	p += sprintf(p, "%s", c->name);
-
-	if (c->id >= 0)
-		sprintf(p, ":%d", c->id);
+	p += sprintf(p, "%s", c->devname ?: c->name);
 
 	d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root);
 	if (!d)
@@ -488,10 +434,7 @@ static int clk_debugfs_register_one(struct clk *c)
 	return 0;
 
 err_out:
-	d = c->dent;
-	list_for_each_entry_safe(child, child_tmp, &d->d_subdirs, d_u.d_child)
-		debugfs_remove(child);
-	debugfs_remove(c->dent);
+	debugfs_remove_recursive(c->dent);
 	return err;
 }