From: Philipp Zabel <p.zabel@pengutronix.de>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] pwm-backlight: fix the panel power sequence
Date: Tue, 03 Nov 2015 11:08:44 +0000 [thread overview]
Message-ID: <1446548924.3373.3.camel@pengutronix.de> (raw)
In-Reply-To: <1446538299.2449.8.camel@mtksdaap41>
Hi YH,
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.
regards
Philipp
next prev parent reply other threads:[~2015-11-03 11:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 9:17 [PATCH v2] pwm-backlight: fix the panel power sequence YH Huang
2015-10-16 9:36 ` Philipp Zabel
2015-10-22 15:12 ` YH Huang
2015-10-29 15:40 ` Philipp Zabel
2015-10-30 7:41 ` YH Huang
2015-10-30 10:34 ` Philipp Zabel
2015-11-03 8:11 ` YH Huang
2015-11-03 11:08 ` Philipp Zabel [this message]
2015-11-04 1:47 ` YH Huang
2015-11-05 9:40 ` Philipp Zabel
2015-11-06 8:31 ` YH Huang
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