linux-kernel - Re: [PATCH v4 0/4] simplefb: Add regulator handling support

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Message-ID: <562A3AEB.2080502@redhat.com>
Date:	Fri, 23 Oct 2015 15:49:31 +0200
From:	Hans de Goede <hdegoede@...hat.com>
To:	Chen-Yu Tsai <wens@...e.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	linux-fbdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v4 0/4] simplefb: Add regulator handling support

Hi,

Patches 1/2 look good and are:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

And the approach used for the regulators in them is also:

Acked-by: Mark Brown <broonie@...nel.org>

So patches 1/2 are ready for merging.

Jean-Christophe or Tomi, can you pick up patch 1 &  2 please ?

Regards,

Hans



On 10/23/2015 05:50 AM, Chen-Yu Tsai wrote:
> Hi everyone,
>
> This is v4 of the simplefb regulator support series. This series adds
> regulator claiming and enabling support for simplefb.
>
> Changes since v4:
>    - Fixed inverted logic when testing the property name.
>    - Fixed regulator supply name string copy length off by 1.
>    - Added real world user, MSI Primo 81 dts patches.
>
> Changes since v3:
>    - Dropped extra "if" which is always true, leftover from v1.
>    - Updated commit message of patch 1
>
> Sometimes the simplefb display output path consits of external conversion
> chips and/or LCD drivers and backlights. These devices normally have
> GPIOs to turn them on and/or bring them out of reset, and regulators
> supplying power to them.
>
> While the kernel does not touch unclaimed GPIOs, the regulator core
> happily disables unused regulators. Thus we need simplefb to claim
> and enable the regulators used throughout the display pipeline.
>
> The binding supports any named regulator supplies under its device
> node. The driver will look through its properties, and claim any
> regulators by matching "*-supply", as Mark suggested.
>
> I've not done a generic helper in the regulator core yet, instead doing
> the regulator property handling in the simplefb code for now.
>
>
> Patch 1 adds the regulator properties to the DT binding.
>
> Patch 2 adds code to the simplefb driver to claim and enable regulators.
> Hans, I dropped your Reviewed-by tag from this patch.
>
> Patch 3 adds labels to the simplefb device nodes in sun6i-a31.dtsi
> so we can reference them in the board dts files, like in the next
> patch.
>
> Patch 4 adds a dts file for MSI's Primo 81 tablet.
>
>
> Regards
> ChenYu
>
> Chen-Yu Tsai (3):
>    dt-bindings: simplefb: Support regulator supply properties
>    simplefb: Claim and enable regulators
>    ARM: dts: sun6i: Add simplefb node labels to reference at board level
>
> Karsten Merker (1):
>    ARM: dts: sun6i: Add dts file for MSI Primo81 tablet
>
>   .../bindings/video/simple-framebuffer.txt          |  13 +-
>   arch/arm/boot/dts/Makefile                         |   1 +
>   arch/arm/boot/dts/sun6i-a31.dtsi                   |   4 +-
>   arch/arm/boot/dts/sun6i-a31s-primo81.dts           | 255 +++++++++++++++++++++
>   drivers/video/fbdev/simplefb.c                     | 120 +++++++++-
>   5 files changed, 386 insertions(+), 7 deletions(-)
>   create mode 100644 arch/arm/boot/dts/sun6i-a31s-primo81.dts
>
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