Re: [PATCH] pwm-backlight: add regulator and GPIO support
From: Alex Courbot
Date: Wed Jul 04 2012 - 22:35:50 EST
On 07/05/2012 12:24 AM, Mark Brown wrote:
On Thu, Jul 05, 2012 at 12:14:39AM +0900, Alex Courbot wrote:
On Wed 04 Jul 2012 10:00:56 PM JST, Sascha Hauer wrote:
Also please be aware that using a regulator in the pwm backlight will
instantly break all existing users. That's hardly your fault though.
Sorry, I don't see why. Could you elaborate on this?
All existing machines will start failing during probe as they won't be
able to find the regulator - you should ideally make sure everyone in
mainline gets an appropriate regulator set up.
Oh, that is a mistake of mine then. Driver probe should continue if no
regulator is declared (but should fail if some other error occured). I
want to maintain backward compatibility with current users of the
driver, so regulator/gpio specification should be optional.
Thanks for all the feedback people - I will come back with a new version
that addresses the points highlighted and also allows power on/off
sequences to be specified in the device tree.
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