Pali Rohár
a29eb319a3
mmc: fsl_esdhc: Set fallback mode to 1-bit
...
8-bit mode is not supported by SD cards and on P2020 are four SDHC pins
shared with SPI (so if P2020 board have also SPI then only 4-bit SDHC mode
is provided). So 8-bit SDHC mode is really bad default.
When max bus width is not provided then set mode to 1-bit. This mode is
supported by all cards, so it is the best option for fallback mode.
Also P2020 bootrom sets mode to 1-bit when booting from SD/MMC card.
Signed-off-by: Pali Rohár <pali@kernel.org >
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com >
2022-06-20 15:52:44 +08:00
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