Re: [PATCH] of: match the compatible in the order set by the dts file

[Sascha Hauer <s.hauer@pengutronix.de>]

On Fri, Jul 05, 2013 at 04:43:38PM +0800, Huang Shijie wrote:
> If we set the uart compatible in the dts file like this:
>    ------------------------------------------------------
>     compatible = "fsl,imx6q-uart", "fsl,imx21-uart";
>    ------------------------------------------------------
> 
> and we set the uart compatible in the uart driver like this:
>    ------------------------------------------------------
> 	{ .compatible = "fsl,imx1-uart", ... },
> 	{ .compatible = "fsl,imx21-uart", ... },
> 	{ .compatible = "fsl,imx6q-uart", ... },
> 	{ /* sentinel */ }
>    ------------------------------------------------------
> 
> the current code will match the "fsl,imx21-uart" in the end.
> 
> Of course, this is not what we want. We want it to match the "fsl,imx6q-uart".
> 
> This patch rewrites the match code, and make it to check the compatible
> in the order set by the DTS file.

Why don't you set the matching order in the driver the way you want it
to be, i.e.:

	{ .compatible = "fsl,imx6q-uart", ... },
	{ .compatible = "fsl,imx21-uart", ... },
	{ .compatible = "fsl,imx1-uart", ... },

Sascha


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