The most exynos used the "Ratio + 1" as div value.
And value at register is "Ratio".
So if want to set exact value, it needs to subtract one.
Value at register ("Ratio") = div - 1
Signed-off-by: Jaehoon Chung <[email protected]>
---
arch/arm/cpu/armv7/exynos/clock.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/clock.c
b/arch/arm/cpu/armv7/exynos/clock.c
index 4ecce44..6633ffe 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -1654,6 +1654,12 @@ unsigned long get_mmc_clk(int dev_index)
void set_mmc_clk(int dev_index, unsigned int div)
{
+ /*
+ * If want to set correct value, it needs to substract one from div.
+ */
+ if (div > 0)
+ div -= 1;
+
if (cpu_is_exynos5()) {
if (proid_is_exynos5420() || proid_is_exynos5800())
exynos5420_set_mmc_clk(dev_index, div);
--
1.9.1
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