mmc: sdio: Enable SDIO 4-bit bus if not support SD_SCR_BUS_WIDTH_4 for SD combo card

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If the card type is SD combo(MMC_TYPE_SD_COMBO) and the memory part does
not support wider bus(SD_SCR_BUS_WIDTH_4), nothing will be done except
return 0. However, we should check whether IO part support wider bus or
not. We should use available IO ability if supported.

In addition, there's a duplicated check to MMC_CAP_4_BIT_DATA since
sdio_enable_wide() will include that check. And we can also save one
call site to sdio_enable_wide() after this change.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Link: https://lore.kernel.org/r/20200608103009.5000-1-zbestahu@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Yue Hu 2020-06-08 18:30:09 +08:00 • committed by Ulf Hansson

parent 42a166d7e0

commit ec97863cac

1 changed files with 12 additions and 14 deletions

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drivers/mmc/core/sdio.c

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