diff options
| author | David Hendricks <dhendrix@chromium.org> | 2013-08-22 16:52:38 -0700 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-08-07 23:54:54 +0200 |
| commit | 0ffa11bdbba48defc55cd38fb2aa2492ca2b5492 (patch) | |
| tree | 1623c55ad49d4f34cd5d3edaa409a535e69120c7 /src/cpu/samsung/exynos5420 | |
| parent | ee4bfbf3e142b17bf263f5ddb3840ed683a04635 (diff) | |
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 <dhendrix@chromium.org>
Change-Id: I89a6a72d20374a513019a272628a05e139b31773
Reviewed-on: https://gerrit.chromium.org/gerrit/66787
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
(cherry picked from commit 34be13b008e262c641268b7c1c6a08e49f18fc37)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6512
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu/samsung/exynos5420')
| -rw-r--r-- | src/cpu/samsung/exynos5420/clock_init.c | 2 | ||||
| -rw-r--r-- | src/cpu/samsung/exynos5420/setup.h | 2 |
2 files changed, 4 insertions, 0 deletions
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) |