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mmc: sdhci-esdhc-imx: support 8bit mode

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The i.MX esdhc has a nonstandard bit layout for the SDHCI_HOST_CONTROL
register. To support 8bit bus width on i.MX populate the platform_bus_width
callback. This is tested on an i.MX25, but should according to the datasheets
work on the other i.MX using this hardware aswell. The i.MX6, while having
a SDHCI_SPEC_300 controller, still uses the same nonstandard register layout.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Sascha Hauer
2013-01-21 19:02:28 +08:00
committed by Chris Ball
parent 7bc088d38f
commit af51079e68
2 changed files with 55 additions and 2 deletions
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include/linux/platform_data/mmc-esdhc-imx.h
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@@ -39,5 +39,6 @@ struct esdhc_platform_data {
unsigned int cd_gpio;
enum wp_types wp_type;
enum cd_types cd_type;
int max_bus_width;
};
#endif /* __ASM_ARCH_IMX_ESDHC_H */