mmc: core: Parse the SD SCR register for support of CMD48/49 and CMD58/59

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In SD spec v4.x the support for CMD48/49 and CMD58/59 were introduced as
optional features. To let the card announce whether it supports the
commands, the SCR register has been extended with corresponding support
bits. Let's parse and store this information for later use.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20210504161222.101536-9-ulf.hansson@linaro.org

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Ulf Hansson 2021-05-04 18:12:19 +02:00

parent 41e84fe164

commit dbea8ae9fe

2 changed files with 5 additions and 1 deletions

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include/linux/mmc/card.h

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