linux-kernel - Re: [PATCH v2 1/2] clk: fractional-divider: switch to rational best approximation

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Message-ID: <CAHp75Vd=t=szZ0eXiGYVVVTv4hWAu35tV53wEq6LB0vx2dCsJw@mail.gmail.com>
Date:	Tue, 31 Mar 2015 10:42:53 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Krogerus, Heikki" <heikki.krogerus@...ux.intel.com>
Subject: Re: [PATCH v2 1/2] clk: fractional-divider: switch to rational best approximation

On Tue, Mar 31, 2015 at 3:32 AM, Stephen Boyd <sboyd@...eaurora.org> wrote:
> On 03/30/15 11:57, Andy Shevchenko wrote:
>> This patch converts the code to use rational best approximation algorithm which
>> is more precise.

>> --- a/drivers/clk/Kconfig
>> +++ b/drivers/clk/Kconfig
>> @@ -14,6 +14,7 @@ config COMMON_CLK
>>       select HAVE_CLK_PREPARE
>>       select CLKDEV_LOOKUP
>>       select SRCU
>> +     select RATIONAL
>>       ---help---
>>         The common clock framework is a single definition of struct
>>         clk, useful across many platforms, as well as an
>> @@ -63,7 +64,6 @@ config COMMON_CLK_SI5351
>>       tristate "Clock driver for SiLabs 5351A/B/C"
>>       depends on I2C
>>       select REGMAP_I2C
>> -     select RATIONAL
>>       ---help---
>>         This driver supports Silicon Labs 5351A/B/C programmable clock
>>         generators.
>> @@ -139,7 +139,6 @@ config COMMON_CLK_CDCE706
>>       tristate "Clock driver for TI CDCE706 clock synthesizer"
>>       depends on I2C
>>       select REGMAP_I2C
>> -     select RATIONAL
>>       ---help---
>>         This driver supports TI CDCE706 programmable 3-PLL clock synthesizer.
>
> Will some kernel janitor find us if we leave the selects here? I know
> you removed it because COMMON_CLK must be Y here and we'd always select
> RATIONAL, but it feels better to leave it alone and actually split off
> the basic clock types into individual configs so that the tiny kernel
> users don't have unused code lying around. That could be future work
> someday and then we might forget to select RATIONAL again.

I'm fine with that as well. So, do I need to resend or you apply
modified version?

-- 
With Best Regards,
Andy Shevchenko
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