[U-Boot] [PATCH] omap3:clock: configure GFX clock to 200MHz for AM/DM37x
hvaibhav at ti.com
hvaibhav at ti.com
Mon Aug 1 16:20:58 CEST 2011
From: Vaibhav Hiremath <hvaibhav at ti.com>
AM/DM37x is another OMAP3 variant, where the GFX clock has been
boosted to 192MHz/200MHz. So fix the GFX_DIV value for this change.
HW Errata: Due to dependency of TV out clock of 54MHz, it is not
possible to configure GFX to 192MHz. So as per HW errats, the
recommended GFX clock is 200MHz (=CORE_CLK/2).
Signed-off-by: Vaibhav Hiremath <hvaibhav at ti.com>
---
arch/arm/cpu/armv7/omap3/clock.c | 2 +-
arch/arm/include/asm/arch-omap3/clocks_omap3.h | 1 +
2 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap3/clock.c b/arch/arm/cpu/armv7/omap3/clock.c
index 064fd3f..892d013 100644
--- a/arch/arm/cpu/armv7/omap3/clock.c
+++ b/arch/arm/cpu/armv7/omap3/clock.c
@@ -380,7 +380,7 @@ static void dpll3_init_36xx(u32 sil_index, u32 clk_index)
/* L3 */
sr32(&prcm_base->clksel_core, 0, 2, CORE_L3_DIV);
/* GFX */
- sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV);
+ sr32(&prcm_base->clksel_gfx, 0, 3, GFX_DIV_36X);
/* RESET MGR */
sr32(&prcm_base->clksel_wkup, 1, 2, WKUP_RSM);
/* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
diff --git a/arch/arm/include/asm/arch-omap3/clocks_omap3.h b/arch/arm/include/asm/arch-omap3/clocks_omap3.h
index 30ef690..c3c9ee3 100644
--- a/arch/arm/include/asm/arch-omap3/clocks_omap3.h
+++ b/arch/arm/include/asm/arch-omap3/clocks_omap3.h
@@ -39,6 +39,7 @@
#define CORE_L4_DIV 2 /* 83MHz : L4 */
#define CORE_L3_DIV 2 /* 166MHz : L3 {DDR} */
#define GFX_DIV 2 /* 83MHz : CM_CLKSEL_GFX */
+#define GFX_DIV_36X 5 /* 200MHz : CM_CLKSEL_GFX */
#define WKUP_RSM 2 /* 41.5MHz: CM_CLKSEL_WKUP */
/* PER DPLL */
--
1.6.2.4
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