From 0ffa11bdbba48defc55cd38fb2aa2492ca2b5492 Mon Sep 17 00:00:00 2001 From: David Hendricks Date: Thu, 22 Aug 2013 16:52:38 -0700 Subject: exynos5420: Set the CLK_DIV_CPERI1 value as per manual Set the CLK_DIV_CPERI1 value as recommended by the 0.02 UM section 7.9.1.25. This suggests to use 0x3F3F0000 as the value to be set to save power. This is ported from https://gerrit.chromium.org/gerrit/#/c/64905 Signed-off-by: David Hendricks Change-Id: I89a6a72d20374a513019a272628a05e139b31773 Reviewed-on: https://gerrit.chromium.org/gerrit/66787 Commit-Queue: David Hendricks Tested-by: David Hendricks Reviewed-by: Ronald G. Minnich (cherry picked from commit 34be13b008e262c641268b7c1c6a08e49f18fc37) Signed-off-by: Isaac Christensen Reviewed-on: http://review.coreboot.org/6512 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan Reviewed-by: Ronald G. Minnich --- src/cpu/samsung/exynos5420/clock_init.c | 2 ++ src/cpu/samsung/exynos5420/setup.h | 2 ++ 2 files changed, 4 insertions(+) (limited to 'src/cpu/samsung') diff --git a/src/cpu/samsung/exynos5420/clock_init.c b/src/cpu/samsung/exynos5420/clock_init.c index eeeda90bf2..15cd0c0368 100644 --- a/src/cpu/samsung/exynos5420/clock_init.c +++ b/src/cpu/samsung/exynos5420/clock_init.c @@ -209,6 +209,8 @@ void system_clock_init(void) writel(CLK_DIV_PERIC3_VAL, &clk->clk_div_peric3); writel(CLK_DIV_PERIC4_VAL, &clk->clk_div_peric4); + writel(CLK_DIV_CPERI1_VAL, &clk->clk_div_cperi1); + writel(CLK_DIV2_RATIO, &clk->clkdiv2_ratio); writel(CLK_DIV4_RATIO, &clk->clkdiv4_ratio); writel(CLK_DIV_G2D, &clk->clk_div_g2d); diff --git a/src/cpu/samsung/exynos5420/setup.h b/src/cpu/samsung/exynos5420/setup.h index 8f14a91602..ca7281dd82 100644 --- a/src/cpu/samsung/exynos5420/setup.h +++ b/src/cpu/samsung/exynos5420/setup.h @@ -48,6 +48,8 @@ struct exynos5_phy_control; #define APLL_FOUT (1 << 0) #define KPLL_FOUT (1 << 0) +#define CLK_DIV_CPERI1_VAL 0x3f3f0000 + /* APLL_CON1 */ #define APLL_CON1_VAL (0x0020f300) -- cgit v1.2.3