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 <jh80.ch...@samsung.com> --- 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 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot