OMAP2/3/4 clock: move clksel clock functions into mach-omap2/clkt_clksel.c

Move all clksel-related clock functions from mach-omap2/clock.c to
mach-omap2/clkt_clksel.c.  This is intended to make the clock code
easier to understand, since all of the functions needed to manage
clksel clocks are now located in their own file, rather than being
mixed with other, unrelated functions.

Clock debugging is also now more finely-grained, since the DEBUG macro
can now be defined for clksel clocks alon.  This should reduce
unnecessary console noise when debugging.

Also, if at some future point the mach-omap2/ directory is split
into OMAP2/3/4 variants, this clkt file can be moved to the plat-omap/
directory to be shared.

Thanks to Alexander Shishkin <virtuoso@slind.org> for his comments to
improve the patch description.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Alexander Shishkin <virtuoso@slind.org>

arch/arm/mach-omap2/Makefile

@@ -9,7 +9,8 @@ omap-2-3-common				= irq.o sdrc.o omap_hwmod.o
 omap-3-4-common				= dpll3xxx.o
 prcm-common				= prcm.o powerdomain.o
 clock-common				= clock.o clock_common_data.o \
-					  clockdomain.o clkt_dpll.o
+					  clockdomain.o clkt_dpll.o \
+					  clkt_clksel.o
 
 obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(prcm-common) $(clock-common)
 obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(prcm-common) $(clock-common) \

arch/arm/mach-omap2/clock.h

@@ -80,6 +80,7 @@ u32 omap2_clksel_to_divisor(struct clk *clk, u32 field_val);
 u32 omap2_divisor_to_clksel(struct clk *clk, u32 div);
 long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
 int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
+int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent);
 u32 omap2_get_dpll_rate(struct clk *clk);
 void omap2_init_dpll_parent(struct clk *clk);
 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
@@ -90,6 +91,7 @@ void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
 				   u8 *other_bit);
 void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
 				u8 *idlest_bit);
+void omap2xxx_clk_commit(struct clk *clk);
 
 extern u8 cpu_mask;