X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=blobdiff_plain;f=arch%2Farm%2Fplat-omap%2Fclock.c;h=72d34a23a2ec6276073af8906e916075b6808945;hp=32ec04c58bcd4fb66e4647d63c5cab6fbbb1e758;hb=429f731dea577bdd43693940cdca524135287e6a;hpb=69cd291c6bbc6647fe3783257c5a2e076e808f71;ds=sidebyside

diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 32ec04c58bcd..72d34a23a2ec 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -11,7 +11,6 @@
  * published by the Free Software Foundation.
  */
 #include <linux/version.h>
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -24,16 +23,50 @@
 #include <linux/platform_device.h>
 
 #include <asm/io.h>
-#include <asm/semaphore.h>
 
 #include <asm/arch/clock.h>
 
-LIST_HEAD(clocks);
+static LIST_HEAD(clocks);
 static DEFINE_MUTEX(clocks_mutex);
-DEFINE_SPINLOCK(clockfw_lock);
+static DEFINE_SPINLOCK(clockfw_lock);
 
 static struct clk_functions *arch_clock;
 
+#ifdef CONFIG_PM_DEBUG
+
+static void print_parents(struct clk *clk)
+{
+	struct clk *p;
+	int printed = 0;
+
+	list_for_each_entry(p, &clocks, node) {
+		if (p->parent == clk && p->usecount) {
+			if (!clk->usecount && !printed) {
+				printk("MISMATCH: %s\n", clk->name);
+				printed = 1;
+			}
+			printk("\t%-15s\n", p->name);
+		}
+	}
+}
+
+void clk_print_usecounts(void)
+{
+	unsigned long flags;
+	struct clk *p;
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	list_for_each_entry(p, &clocks, node) {
+		if (p->usecount)
+			printk("%-15s: %d\n", p->name, p->usecount);
+		print_parents(p);
+
+	}
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+}
+
+#endif
+
 /*-------------------------------------------------------------------------
  * Standard clock functions defined in include/linux/clk.h
  *-------------------------------------------------------------------------*/
@@ -101,6 +134,7 @@ void clk_disable(struct clk *clk)
 		return;
 
 	spin_lock_irqsave(&clockfw_lock, flags);
+	BUG_ON(clk->usecount == 0);
 	if (arch_clock->clk_disable)
 		arch_clock->clk_disable(clk);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
@@ -249,6 +283,8 @@ void followparent_recalc(struct clk *clk)
 		return;
 
 	clk->rate = clk->parent->rate;
+	if (unlikely(clk->flags & RATE_PROPAGATES))
+		propagate_rate(clk);
 }
 
 /* Propagate rate to children */
@@ -267,6 +303,23 @@ void propagate_rate(struct clk * tclk)
 	}
 }
 
+/**
+ * recalculate_root_clocks - recalculate and propagate all root clocks
+ *
+ * Recalculates all root clocks (clocks with no parent), which if the
+ * clock's .recalc is set correctly, should also propagate their rates.
+ * Called at init.
+ */
+void recalculate_root_clocks(void)
+{
+	struct clk *clkp;
+
+	list_for_each_entry(clkp, &clocks, node) {
+		if (unlikely(!clkp->parent) && likely((u32)clkp->recalc))
+			clkp->recalc(clkp);
+	}
+}
+
 int clk_register(struct clk *clk)
 {
 	if (clk == NULL || IS_ERR(clk))
@@ -321,8 +374,57 @@ void clk_allow_idle(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_allow_idle);
 
+void clk_enable_init_clocks(void)
+{
+	struct clk *clkp;
+
+	list_for_each_entry(clkp, &clocks, node) {
+		if (clkp->flags & ENABLE_ON_INIT)
+			clk_enable(clkp);
+	}
+}
+EXPORT_SYMBOL(clk_enable_init_clocks);
+
+#ifdef CONFIG_CPU_FREQ
+void clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (arch_clock->clk_init_cpufreq_table)
+		arch_clock->clk_init_cpufreq_table(table);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+}
+EXPORT_SYMBOL(clk_init_cpufreq_table);
+#endif
+
 /*-------------------------------------------------------------------------*/
 
+#ifdef CONFIG_OMAP_RESET_CLOCKS
+/*
+ * Disable any unused clocks left on by the bootloader
+ */
+static int __init clk_disable_unused(void)
+{
+	struct clk *ck;
+	unsigned long flags;
+
+	list_for_each_entry(ck, &clocks, node) {
+		if (ck->usecount > 0 || (ck->flags & ALWAYS_ENABLED) ||
+			ck->enable_reg == 0)
+			continue;
+
+		spin_lock_irqsave(&clockfw_lock, flags);
+		if (arch_clock->clk_disable_unused)
+			arch_clock->clk_disable_unused(ck);
+		spin_unlock_irqrestore(&clockfw_lock, flags);
+	}
+
+	return 0;
+}
+late_initcall(clk_disable_unused);
+#endif
+
 int __init clk_init(struct clk_functions * custom_clocks)
 {
 	if (!custom_clocks) {
@@ -334,3 +436,4 @@ int __init clk_init(struct clk_functions * custom_clocks)
 
 	return 0;
 }
+