linux-kernel - Re: [PATCH] ARM: multi_v7_defconfig: Enable CROS_EC

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Date:	Wed, 19 Aug 2015 00:28:37 +0200
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Olof Johansson <olof@...om.net>
Cc:	arm@...nel.org, Arnd Bergmann <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Doug Anderson <dianders@...omium.org>,
	Gwendal Grignou <gwendal@...omium.org>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH] ARM: multi_v7_defconfig: Enable CROS_EC_PROTO for
 ChromeOS EC mfd driver

Hello Olof,

On 08/18/2015 11:46 PM, Olof Johansson wrote:
> On Tue, Aug 18, 2015 at 09:10:27AM +0200, Javier Martinez Canillas wrote:
>> The ChromeOS mfd driver (MFD_CROS_EC) select the CROS_EC_PROTO config
>> symbol because the driver uses some communication helper functions in
>> drivers/platform/chrome/cros_ec_proto.c but other drivers depends on
>> CROS_EC_PROTO instead. Mixing select and depends can lead to circular
>> Kconfig dependencies so the MFD_CROS_EC select should be changed to a
>> depends on CROS_EC_PROTO instead.
>>
>> But doing so will break git bisect-ability since MFD_CROS_EC will not
>> be enabled anymore unless the default configs first explicitly enable
>> the CROS_EC_PROTO dependency.
>>
>> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> Applied to cros/ec-config in arm-soc, which will stay stable in case others
> need to bring in as a prereq.
>

Thanks but Bartolomiej's feedback [0] on my patch that made CROS_EC_PROTO
a user selectable option was to leave it as a non-visible option and instead
change the other Kconfig symbols to select CROS_EC_PROTO consistently.

So tomorrow I'll post a new patch series along those lines that will make
this patch obsolete since no defconfig changes will be needed.

IOW, please drop this patch and sorry for the inconvenience.

> 
> -Olof
> 

[0]: https://lkml.org/lkml/2015/8/18/231

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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