Re: [PATCH v2 2/2] spi: add SPI controller driver for UniPhier SoC

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Mon, Jul 30, 2018 at 8:30 AM, Keiji Hayashibara
<hayashibara.keiji@xxxxxxxxxxxxx> wrote:
> Hello Trent and Andy,

>> > > +       ckrat = roundup(ckrat, 2);
>> >
>> > ckrat += ckrat & 1;
>>
>> Either way, the compiler produces the same code:
>>
>>  add r0, r0, #1
>>  bic r0, r0, #1
>>
>> I.e., ckrat = (ckrat + 1) & ~1, one "add" and one "and".
>>
>> Might as well use the macro so it's clear. There is also round_up(x,y), which I believe is intended to be used
>> only with power of 2 values of y.
>
> I confirmed round_up() macro.
> This macro is optimized to power of 2 argument,
> and it matches to this case and clear.
>
> I will replace to round_up() macro.

Good!


-- 
With Best Regards,
Andy Shevchenko
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