mmc: tmio: support IP-builtin card detection logic

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A card detect GPIO is set up only for platforms with "cd-gpios"
DT property or TMIO_MMC_USE_GPIO_CD flag.  However, the driver
core always uses mmc_gpio_get_cd, which just fails with -ENOSYS
if ctx->cd_gpio is unset.

The bit 5 of the status register provides the current signal level
of the CD line.  Allow to use it if the GPIO is unused.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

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Masahiro Yamada 2018-01-18 01:28:12 +09:00 • committed by Ulf Hansson

parent 788778b0d2

commit 497d1f965c

1 changed files with 12 additions and 1 deletions

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drivers/mmc/host/tmio_mmc_core.c

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