linux-kernel - Re: [PATCH 2/2] pwm: add Mediatek display PWM driver support

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Date:	Tue, 12 May 2015 16:34:16 +0200
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	YH Huang <yh.huang@...iatek.com>,
	Mark Rutland <mark.rutland@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>, linux-pwm@...r.kernel.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	linux-mediatek@...ts.infradead.org,
	Sascha Hauer <kernel@...gutronix.de>
Subject: Re: [PATCH 2/2] pwm: add Mediatek display PWM driver support

2015-05-12 15:32 GMT+02:00 Thierry Reding <thierry.reding@...il.com>:
> On Mon, May 11, 2015 at 05:26:22PM +0800, YH Huang wrote:
>> Add display PWM driver support to modify backlight for MT8173/MT6595.
>>
>> Signed-off-by: YH Huang <yh.huang@...iatek.com>
>> ---
>>  drivers/pwm/Kconfig             |   9 ++
>>  drivers/pwm/Makefile            |   1 +
>>  drivers/pwm/pwm-disp-mediatek.c | 225 ++++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 235 insertions(+)
>>  create mode 100644 drivers/pwm/pwm-disp-mediatek.c
>>
>> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
>> index b1541f4..9edbb5a 100644
>> --- a/drivers/pwm/Kconfig
>> +++ b/drivers/pwm/Kconfig
>> @@ -111,6 +111,15 @@ config PWM_CLPS711X
>>         To compile this driver as a module, choose M here: the module
>>         will be called pwm-clps711x.
>>
>> +config PWM_DISP_MEDIATEK
>
> Please make this "PWM_MEDIATEK_DISP" so we can keep everything sorted by
> vendor.
>
>> +     tristate "MEDIATEK display PWM driver"
>
> "MediaTek"?
>
>> +     depends on OF
>
> Technically I think you need depends on HAS_IOMEM here to avoid breakage
> on randconfig builds.
>
>> +     help
>> +       Generic PWM framework driver for mediatek disp-pwm device.
>
> "MediaTek"? Also perhaps this should describe what this PWM is instead
> of just the "disp-pwm" which leaves everyone guessing what it is. From
> the name I'd expect it to be the PWM that is used to control the
> backlight brightness for display, but I think this description should
> say that explicitly.
>
>> +
>> +       To compile this driver as a module, choose M here: the module
>> +       will be called pwm-disp-mediatek.
>
> pwm-mediatek-disp

I would prefert pwm-mtk-disp which is in line with the other drivers.
Also I have to admit that unfortunately the naming is not uniformly
throughout the kernel.

Thanks,
Matthias
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