linux-kernel - Re: [PATCH v3 0/6] Add multiple GPIO and external clock to MMC pwrseq

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Date:	Fri, 30 Jan 2015 12:13:52 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Kukjin Kim <kgene@...nel.org>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Arend van Spriel <arend@...adcom.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/6] Add multiple GPIO and external clock to MMC pwrseq_simple

On 29 January 2015 at 16:00, Javier Martinez Canillas
<javier.martinez@...labora.co.uk> wrote:
> Hello Ulf,
>
> Many WLAN chips attached to an SDIO interface needs more than one GPIO
> for their reset sequence and also an external clock to be operational.
>
> Since this is very common, this series extend the simple MMC power sequence
> to support more than one reset GPIO and also an optional external clock.
>
> This is the third version of the series that addressed issues pointed out
> in the previous versions.
>
> The series depend on v4 "mmc: core: Add support for MMC power sequences":
>
> http://comments.gmane.org/gmane.linux.kernel.mmc/30665
>
> Javier Martinez Canillas (6):
>   mmc: pwrseq: Document that simple sequence support more than one GPIO
>   mmc: pwrseq_simple: Extend to support more pins
>   mmc: pwrseq: Document optional clock for the simple power sequence
>   mmc: pwrseq_simple: Add optional reference clock support
>   ARM: dts: exynos5250-snow: Enable wifi power-on
>   ARM: dts: exynos5250-snow: Add cap-sdio-irq to wifi mmc node
>
>  .../devicetree/bindings/mmc/mmc-pwrseq-simple.txt  | 11 ++-
>  arch/arm/boot/dts/exynos5250-snow.dts              | 26 ++++++-
>  drivers/mmc/core/pwrseq_simple.c                   | 89 ++++++++++++++++++----
>  3 files changed, 107 insertions(+), 19 deletions(-)
>
> Patch #1 extends the simple MMC power sequence DT binding to support more
> than one GPIO and patch #2 adds the actual implementation.
>
> In the same way, patch #3 and #4 extend the simple MMC power sequence DT
> binding and pwrseq_simple driver to support an optional external clock.
>
> Finally as an example, patch #5 and patch #6 adds support for the wifi
> chip in the Exynos5250 Snow that needs all these resources. These two
> patches were added to the series only for completeness and should be
> picked by Kukjin through his linux-samsung tree.
>
> Best regards,
> Javier

Thanks Javier! I have applied patch 1 -> 4 for my next branch.

I made some minor fix to patch4, I send a separate response to that
patch so you know.

Kind regards
Uffe
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