OMAP clock: make the fixed divisor clock code available for all OMAPs

One of the OMAP1 clocks can use the fixed divisor recalculation code
introduced in the OMAP2 clock code, so rename the
omap2_fixed_divisor_recalc() function to omap_fixed_divisor_recalc()
and make it available to all OMAPs.  A followup patch converts the OMAP1
clock.

Signed-off-by: Paul Walmsley <paul@pwsan.com>

2 files changed, 13 insertions, 1 deletions

diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index d9f8c844c38..e0f72f48b8b 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -199,6 +199,17 @@ unsigned long followparent_recalc(struct clk *clk)
 	return clk->parent->rate;
 }
 
+/*
+ * Used for clocks that have the same value as the parent clock,
+ * divided by some factor
+ */
+unsigned long omap_fixed_divisor_recalc(struct clk *clk)
+{
+	WARN_ON(!clk->fixed_div);
+
+	return clk->parent->rate / clk->fixed_div;
+}
+
 void clk_reparent(struct clk *child, struct clk *parent)
 {
 	list_del_init(&child->sibling);
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h
index 94fe2a0ce40..896cedc923a 100644
--- a/arch/arm/plat-omap/include/plat/clock.h
+++ b/arch/arm/plat-omap/include/plat/clock.h
@@ -88,9 +88,9 @@ struct clk {
 	void			(*init)(struct clk *);
 	__u8			enable_bit;
 	__s8			usecount;
+	u8			fixed_div;
 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
 		defined(CONFIG_ARCH_OMAP4)
-	u8			fixed_div;
 	void __iomem		*clksel_reg;
 	u32			clksel_mask;
 	const struct clksel	*clksel;
@@ -134,6 +134,7 @@ extern void propagate_rate(struct clk *clk);
 extern void recalculate_root_clocks(void);
 extern unsigned long followparent_recalc(struct clk *clk);
 extern void clk_enable_init_clocks(void);
+unsigned long omap_fixed_divisor_recalc(struct clk *clk);
 #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);