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.
next prev parent reply other threads:[~2013-11-28 10:09 UTC|newest]
Thread overview: 5+ 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 9:35 ` Benoit Cousson
2013-11-28 9:52 ` Peter Ujfalusi
2013-11-28 10:09 ` Sourav Poddar [this message]
2013-12-05 18:40 ` Tony Lindgren
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5297164D.9060400@ti.com \
--to=sourav.poddar@ti.com \
--cc=bcousson@baylibre.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-omap@vger.kernel.org \
--cc=peter.ujfalusi@ti.com \
--cc=tomi.valkeinen@ti.com \
--cc=tony@atomide.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).