[PATCH V4 0/9] Add mandatory regulator for all users of pwm-backlight.

On Wed, Mar 20, 2013 at 11:24:48AM +0900, Alex Courbot wrote:

On 03/20/2013 11:14 AM, Shawn Guo wrote:

quoted

On Tue, Mar 19, 2013 at 11:59:24AM -0700, Andrew Chew wrote:

quoted

Many backlights are enabled via GPIO.  We can generalize the GPIO to a
fixed regulator.

I think we should push the series of "Runtime Interpreted Power
Sequences" moving forward, which should be useful this case and many
other cases as well.

http://thread.gmane.org/gmane.linux.kernel/1395912

That's still the medium-term plan. But doing this correctly requires
some improvements to be done in the GPIO subsystem, which I am
pushing at the moment.

Thanks for updating the status.

Eventually power sequences should handle this kind of scenario, but
by the meantime it cannot hurt to get the job done.

It just makes us a little sick that a dummy fixed regulator is added
all over the places merely for pwm-backlight to retrieve a GPIO from
device tree.

Shawn