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From:   Robert Jarzmik <robert.jarzmik@free.fr>
To:     Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc:     Linux Media Mailing List <linux-media@vger.kernel.org>,
        Mauro Carvalho Chehab <mchehab@infradead.org>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Akinobu Mita <akinobu.mita@gmail.com>,
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        Michael Grzeschik <m.grzeschik@pengutronix.de>,
        Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Subject: Re: [PATCH v2] media: mt9m111: add regulator support
References: <67b53f91ede9e9ffdda913c818065095a726b92e.1559157595.git.mchehab+samsung@kernel.org>
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Date:   Mon, 03 Jun 2019 21:54:51 +0200
In-Reply-To: <67b53f91ede9e9ffdda913c818065095a726b92e.1559157595.git.mchehab+samsung@kernel.org>
        (Mauro Carvalho Chehab's message of "Wed, 29 May 2019 15:25:18 -0400")
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Mauro Carvalho Chehab <mchehab+samsung@kernel.org> writes:

> From: Robert Jarzmik <robert.jarzmik@free.fr>
>
> In the soc_camera removal, the board specific power callback was
> dropped. This at least will remove the power optimization from ezx and
> em-x270 pxa based boards.
>
> As to recreate the same level of functionality, make the mt9m111 have a
> regulator providing it its power, so that board designers can plug in a
> gpio based or ldo regulator, mimicking their former soc_camera power
> hook.
>
> Fixes: 5c10113cc668 ("media: mt9m111: make a standalone v4l2 subdevice")
>
> [mchehab+samsung@kernel.org: check return values for regulator_enable and
>  fix a build warning]
> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
(on mioa701, pxa architecture, platform data based, on top of 5.0-rc1)

Cheers.

--
Robert