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

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Message-ID: <20140406093053.GH12170@pengutronix.de>
Date:	Sun, 6 Apr 2014 11:30:53 +0200
From:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
To:	Axel Lin <axel.lin@...ics.com>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Maximilian Güntner 
	<maximilian.guentner@...il.com>, linux-kernel@...r.kernel.org,
	linux-leds@...r.kernel.org
Subject: Re: [PATCH RFC] leds: pca9685: Remove leds-pca9685 driver

Hi!

On Sun, Apr 06, 2014 at 11:19:41AM +0800, Axel Lin wrote:
> This driver is replaced by pwm-pca9685 driver and there is no user uses this
> driver in current tree. So remove it.
> 
> Signed-off-by: Axel Lin <axel.lin@...ics.com>
> ---
> Hi,
> I found there is a modalias conflict between leds-pca9685.ko and pwm-pca9685.ko.
> I think this conflict will cause problem.
> After checking the code, I think leds-pca9685 is replaced by pwm-pca9685.

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.

> 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.

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.

Regards,
Steffen

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