From: Vladimir Zapolskiy <vz@mleia.com>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 4/4] video: ARM CLCD: add support of an optional GPIO to enable panel
Date: Fri, 30 Dec 2016 09:24:50 +0000 [thread overview]
Message-ID: <7ac1d3ba-394c-f7de-268c-59a63eb27e8c@mleia.com> (raw)
In-Reply-To: <CACRpkdb5Ojs+meXZKwJP3oDcYAnnrXgqBaXmCcgmgxJM=GkBGA@mail.gmail.com>
On 12/30/2016 10:20 AM, Linus Walleij wrote:
> On Wed, Dec 21, 2016 at 4:27 AM, Vladimir Zapolskiy <vz@mleia.com> wrote:
>
>> The change adds handling of "enable-gpios" property of panel-dpi device
>> node used with an ARM CLCD controller, note that the property already has
>> a description in display/panel/panel-dpi.txt documentation and it founds
>> practical usage while describing some panel devices connected to other
>> types of display controllers.
>>
>> Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
>
> So as you may have seen I already handle a RESET GPIO in the
> Nomadik TPG110 panel subddriver in
> drivers/video/fbdev/amba-clcd-nomadik.c
>
> So is this all your panel needs?
I need "enable-gpios" property to define a GPIO, which literally enables
(powers up) a panel as a separate attached PCB.
To some extend "enable-gpios" property can be replaced by "power" property
with a phandle to a GPIO voltage regulator.
You may look at drivers/gpu/drm/panel/panel-simple.c, both "enable-gpios"
and "power" properties are defined for simple panels.
>
> I guess it is OK for simple panels.
>
--
With best wishes,
Vladimir
next prev parent reply other threads:[~2016-12-30 9:24 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-21 3:27 [PATCH 0/4] video: ARM CLCD: add support of an optional GPIO to enable panel Vladimir Zapolskiy
2016-12-21 3:27 ` [PATCH 1/4] video: ARM CLCD: sort included headers out alphabetically Vladimir Zapolskiy
2016-12-21 3:27 ` [PATCH 2/4] video: ARM CLCD: use panel device node for panel initialization Vladimir Zapolskiy
2016-12-21 3:27 ` [PATCH 3/4] video: ARM CLCD: use panel device node for getting backlight and mode Vladimir Zapolskiy
2016-12-21 3:27 ` [PATCH 4/4] video: ARM CLCD: add support of an optional GPIO to enable panel Vladimir Zapolskiy
2016-12-30 8:20 ` Linus Walleij
2016-12-30 9:24 ` Vladimir Zapolskiy [this message]
2016-12-30 8:23 ` [PATCH 0/4] " Linus Walleij
2017-01-01 20:50 ` Vladimir Zapolskiy
2017-01-02 14:22 ` Russell King - ARM Linux
2017-01-07 23:32 ` Vladimir Zapolskiy
2017-01-10 4:06 ` Vladimir Zapolskiy
2017-01-10 13:47 ` Vladimir Murzin
2017-01-11 15:16 ` Linus Walleij
2017-01-12 0:05 ` Vladimir Zapolskiy
2017-01-12 8:27 ` Linus Walleij
2017-01-12 21:26 ` Vladimir Zapolskiy
2017-01-13 11:08 ` Bartlomiej Zolnierkiewicz
2017-01-17 1:57 ` Vladimir Zapolskiy
2017-01-18 12:22 ` Linus Walleij
[not found] ` <CGME20170130152340epcas5p3f68349ef89c5ec902186ae71011c0c4b@epcas5p3.samsung.com>
2017-01-30 15:23 ` Bartlomiej Zolnierkiewicz
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