linux-kernel - Re: [PATCH RFC] leds: pca9685: Remove leds-pca9685 driver

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Message-ID: <CAK5ve-JjFShyyLys3ZNVa4s+y1+ac-oDYraC8vF+H1rEnDSfxQ@mail.gmail.com>
Date:	Mon, 7 Apr 2014 14:26:17 -0700
From:	Bryan Wu <cooloney@...il.com>
To:	Maximilian Güntner 
	<maximilian.guentner@...il.com>
Cc:	Axel Lin <axel.lin@...ics.com>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Thierry Reding <thierry.reding@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>
Subject: Re: [PATCH RFC] leds: pca9685: Remove leds-pca9685 driver

On Sun, Apr 6, 2014 at 4:12 AM, Maximilian Güntner
<maximilian.guentner@...il.com> wrote:
> 2014-04-06 12:40 GMT+02:00 Axel Lin <axel.lin@...ics.com>:
>> 2014-04-06 17:30 GMT+08:00 Steffen Trumtrar <s.trumtrar@...gutronix.de>:
>>> Hi!
>
> Hello,
>
>>> This confused me for a second, as there was no driver to replace when I wrote
>>> the pwm-pca9685 driver and I thought I missed something. But it seems I didn't
>>> and the pwm-pca9685 is actually older.
>>
>> Ah.. right, leds-pca9685 is a newer driver.
>>
>> 2013-10-22 leds: Added driver for the NXP PCA9685 I2C chip
>> 2013-05-30 pwm: add pca9685 driver
>>
> True. I wrote this driver in April 2013 since there was no driver
> available for the PCA9685 at this point.
> When I submitted it in October I only checked 'drivers/leds/' for
> support but not 'drivers/pwm'.
>
>>>
>>>> Use git grep to check current tree and found there is no user uses leds-pca9685.
>>>> So this patch removes leds-pca9685 driver.
>>>>
>>>
>>> If the platform setup is needed, maybe this can be integrated into the pwm driver
>>> instead of completely dropping it. I don't care for platform code, but if someone
>>> does, I don't want him to lose the support for it.
>>
>> Given the fact there is no user in current tree uses leds-pca9685,
>> I suspect if we need to add platform setup to pwm-pca9685.
>> ( I think the trend is to use DT, not the reverse )
>>
>>>
>>> Otherwise I am okay with this drop (okay, I'm completely biased of course ;-)).
>>> But technically the pca9685 is not solely a LED driver IC, but a PWM IC, so it
>>> is in the wrong place anyhow.
>>
>> I also think PWM subsystem is better for this chip which is a PWM IC.
> +1
>
> I also ACK the drop of leds-pca9685 in favor of pwm-pca9685.
>
> Thanks,
>
> Maximilian

OK, great, I will merge this change with Maximilian and Steffen's acks.

Thanks,
-Bryan
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