---

yaml
---
r: 296606
b: refs/heads/master
c: b845186
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0cf0d815ba0d09281c5671b82a83c4220a606dc4
+refs/heads/master: b84518625183e87c6930b11db0592be786181128

trunk/arch/arm/mach-lpc32xx/clock.c

@@ -97,9 +97,10 @@
 #include "clock.h"
 #include "common.h"
 
+static DEFINE_SPINLOCK(global_clkregs_lock);
+
 static struct clk clk_armpll;
 static struct clk clk_usbpll;
-static DEFINE_MUTEX(clkm_lock);
 
 /*
  * Post divider values for PLLs based on selected register value
@@ -891,16 +892,6 @@ static struct clk clk_lcd = {
 	.enable_mask	= LPC32XX_CLKPWR_LCDCTRL_CLK_EN,
 };
 
-static inline void clk_lock(void)
-{
-	mutex_lock(&clkm_lock);
-}
-
-static inline void clk_unlock(void)
-{
-	mutex_unlock(&clkm_lock);
-}
-
 static void local_clk_disable(struct clk *clk)
 {
 	/* Don't attempt to disable clock if it has no users */
@@ -945,10 +936,11 @@ static int local_clk_enable(struct clk *clk)
 int clk_enable(struct clk *clk)
 {
 	int ret;
+	unsigned long flags;
 
-	clk_lock();
+	spin_lock_irqsave(&global_clkregs_lock, flags);
 	ret = local_clk_enable(clk);
-	clk_unlock();
+	spin_unlock_irqrestore(&global_clkregs_lock, flags);
 
 	return ret;
 }
@@ -959,9 +951,11 @@ EXPORT_SYMBOL(clk_enable);
  */
 void clk_disable(struct clk *clk)
 {
-	clk_lock();
+	unsigned long flags;
+
+	spin_lock_irqsave(&global_clkregs_lock, flags);
 	local_clk_disable(clk);
-	clk_unlock();
+	spin_unlock_irqrestore(&global_clkregs_lock, flags);
 }
 EXPORT_SYMBOL(clk_disable);
 
@@ -970,13 +964,7 @@ EXPORT_SYMBOL(clk_disable);
  */
 unsigned long clk_get_rate(struct clk *clk)
 {
-	unsigned long rate;
-
-	clk_lock();
-	rate = clk->get_rate(clk);
-	clk_unlock();
-
-	return rate;
+	return clk->get_rate(clk);
 }
 EXPORT_SYMBOL(clk_get_rate);
 
@@ -992,11 +980,8 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
 	 * the actual rate set as part of the peripheral dividers
 	 * instead of high level clock control
 	 */
-	if (clk->set_rate) {
-		clk_lock();
+	if (clk->set_rate)
 		ret = clk->set_rate(clk, rate);
-		clk_unlock();
-	}
 
 	return ret;
 }
@@ -1007,15 +992,11 @@ EXPORT_SYMBOL(clk_set_rate);
  */
 long clk_round_rate(struct clk *clk, unsigned long rate)
 {
-	clk_lock();
-
 	if (clk->round_rate)
 		rate = clk->round_rate(clk, rate);
 	else
 		rate = clk->get_rate(clk);
 
-	clk_unlock();
-
 	return rate;
 }
 EXPORT_SYMBOL(clk_round_rate);