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authorPaul Walmsley <paul@pwsan.com>2009-01-28 12:27:42 -0700
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-02-08 17:50:40 +0000
commit0eafd4725cf5d828e76e474b8991a228bbdd3f2b (patch)
tree797186618cb16d1ddb3f42a1ac9c9d4f84bdc7c1 /arch/arm/mach-omap2/clock34xx.h
parent87246b7567f7d1951bfcea29875523ef435c0ebf (diff)
[ARM] OMAP3 clock: add omap3_core_dpll_m2_set_rate()
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>
Diffstat (limited to 'arch/arm/mach-omap2/clock34xx.h')
-rw-r--r--arch/arm/mach-omap2/clock34xx.h9
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/clock34xx.h b/arch/arm/mach-omap2/clock34xx.h
index aadd296c05a..681acf0427c 100644
--- a/arch/arm/mach-omap2/clock34xx.h
+++ b/arch/arm/mach-omap2/clock34xx.h
@@ -34,6 +34,7 @@ static void omap3_dpll_deny_idle(struct clk *clk);
static u32 omap3_dpll_autoidle_read(struct clk *clk);
static int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate);
static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate);
+static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate);
/* Maximum DPLL multiplier, divider values for OMAP3 */
#define OMAP3_MAX_DPLL_MULT 2048
@@ -471,11 +472,7 @@ static const struct clksel div31_dpll3m2_clksel[] = {
{ .parent = NULL }
};
-/*
- * DPLL3 output M2
- * REVISIT: This DPLL output divider must be changed in SRAM, so until
- * that code is ready, this should remain a 'read-only' clksel clock.
- */
+/* DPLL3 output M2 - primary control point for CORE speed */
static struct clk dpll3_m2_ck = {
.name = "dpll3_m2_ck",
.ops = &clkops_null,
@@ -486,6 +483,8 @@ static struct clk dpll3_m2_ck = {
.clksel = div31_dpll3m2_clksel,
.flags = RATE_PROPAGATES,
.clkdm_name = "dpll3_clkdm",
+ .round_rate = &omap2_clksel_round_rate,
+ .set_rate = &omap3_core_dpll_m2_set_rate,
.recalc = &omap2_clksel_recalc,
};