linux-kernel - Re: [PATCH 1/2] mmc: arasan: Add driver for Arasan SDHCI

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Message-ID: <526EF149.8060304@gmail.com>
Date:	Mon, 28 Oct 2013 18:20:41 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Soren Brinkmann <soren.brinkmann@...inx.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	Chris Ball <cjb@...top.org>,
	Michal Simek <michal.simek@...inx.com>,
	Grant Likely <grant.likely@...aro.org>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mmc@...r.kernel.org, linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] mmc: arasan: Add driver for Arasan SDHCI

On 10/15/2013 02:08 PM, Soren Brinkmann wrote:
> Add a driver for Arasan's SDHCI controller core.
> 
> Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> ---
>  .../devicetree/bindings/mmc/arasan,sdhci.txt       |  23 +++
>  MAINTAINERS                                        |   1 +
>  drivers/mmc/host/Kconfig                           |  12 ++
>  drivers/mmc/host/Makefile                          |   1 +
>  drivers/mmc/host/sdhci-of-arasan.c                 | 224 +++++++++++++++++++++
>  5 files changed, 261 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>  create mode 100644 drivers/mmc/host/sdhci-of-arasan.c
> 
> diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
> new file mode 100644
> index 000000000000..20f0fc25e270
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
> @@ -0,0 +1,23 @@
> +Device Tree Bindings for the Arasan SDCHI Controller
> +
> +  The bindings follow the mmc[1] and the clock bindings[2]. Only deviations are
> +  documented here.
> +
> +  [1] Documentation/devicetree/bindings/mmc/mmc.txt
> +  [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
> +
> +Required Properties:
> +  - compatible: Compatibility string. Must be 'arasan,sdhci'

This string is a bit non-specific. Vendor IP typically has configurable
options, different revs of IP with fixes/differences, and the
possibility of integration wierdness or bugs. So it is better to be as
specific as possible in case the kernel needs to know exactly what
version of h/w this is.

Rob

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