[PATCH v2] pwm-backlight: fix the panel power sequence
p.zabel at pengutronix.de
Tue Nov 3 03:08:44 PST 2015
Am Dienstag, den 03.11.2015, 16:11 +0800 schrieb YH Huang:
> > The reasoning is that devices where there is no phandle link pointing to
> > the backlight (for example from a simple-panel node), we should keep the
> > current default behaviour (enable during probe).
> I have a little problem for the current default behaviour.
> Should we enable during probe?
Here I mean enabling the backlight (at the end of the probe function),
not enabling the GPIO already when requesting it.
> Before this patch ( http://patchwork.ozlabs.org/patch/324690/ ),
> we disable "enable-gpio" in the probe function.
While before this patch the GPIO would be initialized in the disabled
state, the call to backlight_update_status at the end of the probe
function would still enable the backlight afterwards.
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