[ARM] OMAP3 clock: add omap3_core_dpll_m2_set_rate()

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Add the omap3_core_dpll_m2_set_rate() function to the OMAP3 clock code,
which calls into the SRAM function omap3_sram_configure_core_dpll() to
change the CORE DPLL M2 divider.  (SRAM code is necessary since rate changes
on clocks upstream from the SDRC can glitch SDRAM accesses.)

Use this function for the set_rate function pointer in the dpll3_m2_ck
struct clk.  With this function in place, PM/OPP code should be able to
alter SDRAM speed via code similar to:

      clk_set_rate(&dpll3_m2_ck, target_rate).

linux-omap source commit is 7f8b2b0f4fe52238c67d79dedcd2794dcef4dddd.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Paul Walmsley 2009-01-28 12:27:42 -07:00 • committed by Russell King

parent 87246b7567

commit 0eafd4725c

2 changed files with 69 additions and 5 deletions

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65

arch/arm/mach-omap2/clock34xx.c

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9

arch/arm/mach-omap2/clock34xx.h

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