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From: Arnd Bergmann <arnd@arndb.de>
To: Dongjin Kim <tobetter@gmail.com>
Subject: Re: [PATCH v3] mmc: dw_mmc: Add MSHC compatible for Exynos4412
Date: Mon, 18 Feb 2013 22:36:43 +0000
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Cc: Jaehoon Chung <jh80.chung@samsung.com>,
        Sachin Kamat <sachin.kamat@linaro.org>, Chris Ball <cjb@laptop.org>,
        Thomas Abraham <thomas.abraham@linaro.org>,
        Will Newton <will.newton@imgtec.com>, linux-mmc@vger.kernel.org,
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On Monday 18 February 2013, Dongjin Kim wrote:
> 
> This patch adds the compatible string for MSHC controller of Exynos4412, and
> share the controller specific properties with Exynos5250 since they have same
> features. Its driver data name is changed to exynos_drv_data instead SoC
> specific name.
> 
> Cc: Jaehoon Chung <jh80.chung@samsung.com>
> Cc: Sachin Kamat <sachin.kamat@linaro.org>
> Signed-off-by: Dongjin Kim <tobetter@gmail.com>

If they are completely compatibly, you can just list
"samsung,exynos4412-dw-mshc" in the compatible property of the
exynos5250 device tree, along with the other ones like:

	compatible = "samsung,exynos5250-dw-mshc", "samsung,exynos4412-dw-mshc", "snps,dw-mshc";

then you don't need to change the driver at all.

	Arnd