Hi,
On 20/11/14 17:17, Jaehoon Chung wrote:
> 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.
> + */
wrong comment style
> + if (div > 0)
> + div -= 1;
On trats2 and odroid dts file, div value is set to 0x3.
Then should it modified to 0x4 after applied this patch?
> +
> if (cpu_is_exynos5()) {
> if (proid_is_exynos5420() || proid_is_exynos5800())
> exynos5420_set_mmc_clk(dev_index, div);
>
Thanks,
Minkyu Kang.
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