From: Sourav Poddar <sourav.poddar@ti.com>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>,
Benoit Cousson <bcousson@baylibre.com>
Cc: Tony Lindgren <tony@atomide.com>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
devicetree@vger.kernel.org, tomi.valkeinen@ti.com
Subject: Re: [PATCH] ARM: DTS: omap4-sdp: Add regulator for LCD backlight (pwm-backlight)
Date: Thu, 28 Nov 2013 15:39:17 +0530 [thread overview]
Message-ID: <5297164D.9060400@ti.com> (raw)
In-Reply-To: <1385630924-16392-1-git-send-email-peter.ujfalusi@ti.com>
On Thursday 28 November 2013 02:58 PM, Peter Ujfalusi wrote:
> Since in DT booted kernel dummy regulators are no longer supported we need
> to provide valid phandle for the regulator needed by the backlight.
> On the board VBAT is used to power the LCD backlight(s).
>
> Signed-off-by: Peter Ujfalusi<peter.ujfalusi@ti.com>
> ---
> Hi,
>
> This patch is needed for 3.13 to get the LCD backlight to work again.
Is this usage of power supply a mandatory requirement?
There is a thread which discusses this issue[1]:
http://www.spinics.net/lists/arm-kernel/msg288215.html
According to the above, regulator framework have support in 3.13-rc1 to
returns
a dummy regulator if there is none specified in the dts data.
Thierry told that there seems to be a bug in regulator in handling these
case.
Though, I also posted a patch on pwm a couple of days ago[2]
[2]: https://patchwork.kernel.org/patch/3246711/
I posted it without "power-supply" by testing it with the
solution proposed in [1].
If I dont use the solution[1], it fails for me also.
WARNING: multiple messages have this Message-ID (diff)
From: sourav.poddar@ti.com (Sourav Poddar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: DTS: omap4-sdp: Add regulator for LCD backlight (pwm-backlight)
Date: Thu, 28 Nov 2013 15:39:17 +0530 [thread overview]
Message-ID: <5297164D.9060400@ti.com> (raw)
In-Reply-To: <1385630924-16392-1-git-send-email-peter.ujfalusi@ti.com>
On Thursday 28 November 2013 02:58 PM, Peter Ujfalusi wrote:
> Since in DT booted kernel dummy regulators are no longer supported we need
> to provide valid phandle for the regulator needed by the backlight.
> On the board VBAT is used to power the LCD backlight(s).
>
> Signed-off-by: Peter Ujfalusi<peter.ujfalusi@ti.com>
> ---
> Hi,
>
> This patch is needed for 3.13 to get the LCD backlight to work again.
Is this usage of power supply a mandatory requirement?
There is a thread which discusses this issue[1]:
http://www.spinics.net/lists/arm-kernel/msg288215.html
According to the above, regulator framework have support in 3.13-rc1 to
returns
a dummy regulator if there is none specified in the dts data.
Thierry told that there seems to be a bug in regulator in handling these
case.
Though, I also posted a patch on pwm a couple of days ago[2]
[2]: https://patchwork.kernel.org/patch/3246711/
I posted it without "power-supply" by testing it with the
solution proposed in [1].
If I dont use the solution[1], it fails for me also.
next prev parent reply other threads:[~2013-11-28 10:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-28 9:28 [PATCH] ARM: DTS: omap4-sdp: Add regulator for LCD backlight (pwm-backlight) Peter Ujfalusi
2013-11-28 9:28 ` Peter Ujfalusi
2013-11-28 9:35 ` Benoit Cousson
2013-11-28 9:35 ` Benoit Cousson
2013-11-28 9:52 ` Peter Ujfalusi
2013-11-28 9:52 ` Peter Ujfalusi
2013-11-28 10:09 ` Sourav Poddar [this message]
2013-11-28 10:09 ` Sourav Poddar
2013-12-05 18:40 ` Tony Lindgren
2013-12-05 18:40 ` Tony Lindgren
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