mmc: sdhci-of-at91: fix CALCR register being rewritten

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When enabling calibration at reset, the CALCR register was completely
rewritten. This may cause certain bits being deleted unintentedly.
Fix by issuing a read-modify-write operation.

Fixes: 727d836a37 ("mmc: sdhci-of-at91: add DT property to enable calibration on full reset")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20200527105659.142560-1-eugen.hristev@microchip.com
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Eugen Hristev 2020-05-27 13:56:59 +03:00 • committed by Ulf Hansson

parent 16e40e5b1e

commit dbdea70f71

1 changed files with 5 additions and 2 deletions

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drivers/mmc/host/sdhci-of-at91.c

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