From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, rpurdie@rpsys.net,
linux-samsung-soc@vger.kernel.org, grant.likely@secretlab.ca,
rob.herring@calxeda.com, kgene.kim@samsung.com,
jg1.han@samsung.com, kyungmin.park@samsung.com, cbou@mail.ru,
kwangwoo.lee@gmail.com, augulis.darius@gmail.com,
ben-linux@fluff.org, patches@linaro.org
Subject: Re: [PATCH] backlight: lcd: add driver for raster-type lcd's with gpio controlled panel reset
Date: Wed, 11 Jan 2012 17:45:41 +0000 [thread overview]
Message-ID: <20120111174540.GE24213@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <CAJuYYwSuDzUWgnSJHO0vwjYH7zscC9=j_=JuOUuJy9shHpPUuA@mail.gmail.com>
On Wed, Jan 11, 2012 at 04:21:57PM +0530, Thomas Abraham wrote:
> In the case of Exynos4 based Origen board, buck7 of max8997 supplies
> power to the lcd panel. buck7 is capable of supplying power at
> different voltage levels but for Origen board, it is required to
> supply only 3.3V. The constraints for buck7 can specify 'apply_uV' and
> this will ensure that buck7 is configured to supply 3.3V.
> But 'apply_uV' seems to be not ideal for regulators that supply power
> to lcd panels. It would be better to power lcd panels only when video
> data has to be displayed.
What makes you say this? Enabling and disabling a regulator are
entirely orthogonal to setting the regulator voltage.
next prev parent reply other threads:[~2012-01-11 17:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-05 15:42 [PATCH] backlight: lcd: add driver for raster-type lcd's with gpio controlled panel reset Thomas Abraham
2012-01-05 19:07 ` Lars-Peter Clausen
2012-01-06 6:49 ` Mark Brown
2012-01-07 11:04 ` Thomas Abraham
2012-01-07 17:28 ` Mark Brown
2012-01-11 10:51 ` Thomas Abraham
2012-01-11 17:45 ` Mark Brown [this message]
2012-01-12 1:34 ` Thomas Abraham
2012-01-07 10:46 ` Thomas Abraham
2012-01-06 2:16 ` Jingoo Han
2012-01-07 10:48 ` Thomas Abraham
2012-01-06 6:46 ` Olof Johansson
2012-01-07 10:59 ` Thomas Abraham
2012-01-07 18:23 ` Russell King - ARM Linux
2012-01-07 18:32 ` Lars-Peter Clausen
2012-01-11 10:58 ` Thomas Abraham
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