Re: [PATCH v2 2/2] spi: add SPI controller driver for UniPhier SoC
From: Andy Shevchenko
Date: Mon Jul 30 2018 - 04:39:10 EST
On Mon, Jul 30, 2018 at 8:30 AM, Keiji Hayashibara
> 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.
With Best Regards,