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authorGabe Black <gabeblack@google.com>2013-06-22 19:43:40 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-07-10 22:49:33 +0200
commitcf7509cfd1c775f4ee664f7784257c73bffd1513 (patch)
tree2d4b84fe48332b3e8ed5d332bc56629577362aa6
parent7dd581494dbaff64e4a2dd31f29cb254104d2d03 (diff)
downloadcoreboot-cf7509cfd1c775f4ee664f7784257c73bffd1513.tar.xz
exynos5420: Fix the way the rate of the input clock for i2c buses is found.
The clock divider was being read from registers incorrectly which meant that the periph rate was wrong. Change-Id: I50efb62849ef29bdfb0efc56c49642d3edca094c Signed-off-by: Gabe Black <gabeblack@chromium.org> Reviewed-on: http://review.coreboot.org/3699 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
-rw-r--r--src/cpu/samsung/exynos5420/clock.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/cpu/samsung/exynos5420/clock.c b/src/cpu/samsung/exynos5420/clock.c
index e5ab001374..8c4baf8cc7 100644
--- a/src/cpu/samsung/exynos5420/clock.c
+++ b/src/cpu/samsung/exynos5420/clock.c
@@ -196,9 +196,8 @@ unsigned long clock_get_periph_rate(enum periph_id peripheral)
case PERIPH_ID_I2C9:
case PERIPH_ID_I2C10:
sclk = get_pll_clk(MPLL);
- sub_div = ((readl(&clk->clk_div_top1) >> 24) & 0x7) + 1;
- div = (readl(&clk->clk_div_top0) & 0x7) + 1;
- return (sclk / sub_div) / div;
+ div = ((readl(&clk->clk_div_top1) >> 8) & 0x3f) + 1;
+ return sclk / div;
default:
printk(BIOS_DEBUG, "%s: invalid peripheral %d", __func__, peripheral);
return -1;