[U-Boot] [PATCH V4 5/9] EXYNOS5: DWMMC: API to set mmc clock divisor

Jaehoon Chung
2013-01-11T03:52:19Z

On 01/11/2013 12:35 AM, Simon Glass wrote:
> Hi Amar,
>
> On Fri, Jan 4, 2013 at 1:34 AM, Amar <amarendra.xt@samsung.com> wrote:
>> This API computes the divisor value based on MPLL clock and
>> writes it into the FSYS1 register.
>>
>> Changes from V1:
>> 1)Updated the function exynos5_mmc_set_clk_div() to receive
>> 'device_i'd as input parameter instead of 'index'.
>>
>> Changes from V2:
>> 1)Updation of commit message and resubmition of proper patch set.
>>
>> Changes from V3:
>> 1)Removed the new API exynos5_mmc_set_clk_div() from clock.c,
>> because existing API set_mmc_clk() can be used to set mmc clock.
>>
>> Signed-off-by: Amar <amarendra.xt@samsung.com>
>> ---
>> arch/arm/cpu/armv7/exynos/clock.c | 4 ++--
>> arch/arm/include/asm/arch-exynos/clk.h | 3 +++
>> 2 files changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
>> index 973b84e..89574ba 100644
>> --- a/arch/arm/cpu/armv7/exynos/clock.c
>> +++ b/arch/arm/cpu/armv7/exynos/clock.c
>> @@ -490,7 +490,7 @@ static unsigned long exynos4_get_mmc_clk(int dev_index)
>> (struct exynos4_clock *)samsung_get_base_clock();
>> unsigned long uclk, sclk;
>> unsigned int sel, ratio, pre_ratio;
>> - int shift;
>> + int shift = 0;
>
> Is this fixing a warning?
Maybe..fix the compiler warning..
>
>>
>> sel = readl(&clk->src_fsys);
>> sel = (sel >> (dev_index << 2)) & 0xf;
>> @@ -539,7 +539,7 @@ static unsigned long exynos5_get_mmc_clk(int dev_index)
>> (struct exynos5_clock *)samsung_get_base_clock();
>> unsigned long uclk, sclk;
>> unsigned int sel, ratio, pre_ratio;
>> - int shift;
>> + int shift = 0;
>>
>> sel = readl(&clk->src_fsys);
>> sel = (sel >> (dev_index << 2)) & 0xf;
>> diff --git a/arch/arm/include/asm/arch-exynos/clk.h b/arch/arm/include/asm/arch-exynos/clk.h
>> index 1935b0b..a4d5b4e 100644
>> --- a/arch/arm/include/asm/arch-exynos/clk.h
>> +++ b/arch/arm/include/asm/arch-exynos/clk.h
>> @@ -29,6 +29,9 @@
>> #define VPLL 4
>> #define BPLL 5
>>
>> +#define FSYS1_MMC0_DIV_MASK 0xff0f
>> +#define FSYS1_MMC0_DIV_VAL 0x0701
>
> What is this used for? I don't see it in this patch.
>
> Overall it is not clear what this patch is for.
This define didn't need. That value is not static value, isn't?

Best Regards,
Jaehoon Chung
>
>> +
>> unsigned long get_pll_clk(int pllreg);
>> unsigned long get_arm_clk(void);
>> unsigned long get_i2c_clk(void);
>> --
>> 1.8.0
>>
>
> Regards,
> Simon
>