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Re: [PATCH v3 1/2] clk: samsung: cpu: Prepare for addition for Exynos7 CPU clocks

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  Re: [PATCH v3 1/2] clk: samsung: cpu: Prepare for addition for  Exynos7 CPU clocks Abhilash Kesavan <kesavan.abhilash@gmail.com> - 2016-07-11 16:50 +0200

#1440675 — Re: [PATCH v3 1/2] clk: samsung: cpu: Prepare for addition for Exynos7 CPU clocks

Hi Sylwester,

On Thu, Jul 7, 2016 at 12:45 PM, Sylwester Nawrocki
<s.nawrocki@samsung.com> wrote:
> On 07/05/2016 10:29 PM, Abhilash Kesavan wrote:
>> Exynos7 has the same CPU clock registers layout as that present
>> in Exynos5433 except for the bits in the MUX_STAT* registers.
>> Add a new CLK_CPU_HAS_MODIFIED_MUX_STAT flag to handle this change.
>
>> --- a/drivers/clk/samsung/clk-cpu.h
>> +++ b/drivers/clk/samsung/clk-cpu.h
>> @@ -63,6 +63,8 @@ struct exynos_cpuclk {
>>  /* The CPU clock registers have Exynos5433-compatible layout */
>>  #define CLK_CPU_HAS_E5433_REGS_LAYOUT        (1 << 2)
>
>> +/* Exynos5433-compatible layout with different MUX_STAT register bits */
>> +#define CLK_CPU_HAS_MODIFIED_MUX_STAT        (1 << 3)
>
> It's getting a bit messy, what if there comes another SoC version
> which has some other modification of exynos5433 registers structure?
> We would need another variant of HAS_MODIFIED_MUX_STAT flag and we
> could easily get lost while trying to determine which modification
> is which. How about indicating explicitly it's an exynos7 bits
> layout and renaming the flag to something like
>
> #define CLK_CPU_HAS_E7_MUX_STAT (1 << 16) ?
Will rename the flag to make it SoC specific as per your suggestion.

Regards,
Abhilash

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