OMAP clock/CPUFreq: add clk_exit_cpufreq_table()

A subsequent patch adds code on OMAP2xxx to dynamically allocate the
CPUFreq frequency table in clk_init_cpufreq_table(), so for it to
avoid a leak, it will need a corresponding function to free the
memory.  This patch adds clk_exit_cpufreq_table() with generic
code to call a chip-specific variant inside the clockfw_lock spinlock via
struct clk_functions.
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/plat-omap/clock.c

@@ -329,6 +329,16 @@ void clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
 		arch_clock->clk_init_cpufreq_table(table);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
 }
+
+void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (arch_clock->clk_exit_cpufreq_table)
+		arch_clock->clk_exit_cpufreq_table(table);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+}
 #endif
 
 /*-------------------------------------------------------------------------*/

arch/arm/plat-omap/cpu-omap.c

@@ -134,6 +134,7 @@ static int __init omap_cpu_init(struct cpufreq_policy *policy)
 
 static int omap_cpu_exit(struct cpufreq_policy *policy)
 {
+	clk_exit_cpufreq_table(&freq_table);
 	clk_put(mpu_clk);
 	return 0;
 }

arch/arm/plat-omap/include/plat/clock.h

@@ -119,6 +119,7 @@ struct clk_functions {
 	void		(*clk_disable_unused)(struct clk *clk);
 #ifdef CONFIG_CPU_FREQ
 	void		(*clk_init_cpufreq_table)(struct cpufreq_frequency_table **);
+	void		(*clk_exit_cpufreq_table)(struct cpufreq_frequency_table **);
 #endif
 };
 
@@ -135,6 +136,7 @@ extern unsigned long followparent_recalc(struct clk *clk);
 extern void clk_enable_init_clocks(void);
 #ifdef CONFIG_CPU_FREQ
 extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
+extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 #endif
 
 extern const struct clkops clkops_null;