linux-kernel - Re: [PATCH 1/2] pinctrl: uniphier: enable UniPhier SoCs pinctrl drivers by default

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Date:	Fri, 30 Oct 2015 11:01:21 +0900
From:	Masahiro Yamada <yamada.masahiro@...ionext.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"arm@...nel.org" <arm@...nel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] pinctrl: uniphier: enable UniPhier SoCs pinctrl
 drivers by default

Hi Linus,


2015-10-29 22:33 GMT+09:00 Linus Walleij <linus.walleij@...aro.org>:
> On Tue, Oct 27, 2015 at 3:28 AM, Masahiro Yamada
> <yamada.masahiro@...ionext.com> wrote:
>
>> Add "default y" to the Kconfig rather than adding entries into
>> arch/arm/configs/multi_v7_defconfig.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>
> (...)
>> config PINCTRL_UNIPHIER_PH1_LD4
>>         tristate "UniPhier PH1-LD4 SoC pinctrl driver"
>> +       default y
>>         select PINCTRL_UNIPHIER_CORE
>
> Why is it not default y if <PH1_LD4_SOC_THING>?
>
> So it is only turned on if the corresponding SoC is selected?
>
> Or don't you have symbols like that?

No, I don't have such per-SoC symbols.

I only have ARCH_UNIPHIER, for the whole UniPhier SoC family.

We no longer #ifdef <SOC_THING> in C sources.

The only difference among SoCs is, which drivers should be enabled.

All SoCs in UniPhier family share the multi-platform kernel image,
so I think, this way is reasonable enough.



-- 
Best Regards
Masahiro Yamada
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