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Commit 85f9ef8c authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Ulf Hansson
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mmc: slot-gpio: add a helper to check capability of GPIO WP detection 



Like mmc_can_gpio_cd(), mmc_can_gpio_ro() will also be useful for host
drivers to know whether GPIO write-protect detection is supported.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent bc45719c

drivers/mmc/core/slot-gpio.c

+8 −0
Original line number Diff line number Diff line
@@ -305,3 +305,11 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, 
	return 0;

}

EXPORT_SYMBOL(mmc_gpiod_request_ro);



bool mmc_can_gpio_ro(struct mmc_host *host)

{

	struct mmc_gpio *ctx = host->slot.handler_priv;



	return ctx->ro_gpio ? true : false;

}

EXPORT_SYMBOL(mmc_can_gpio_ro);

include/linux/mmc/slot-gpio.h

+1 −0
Original line number Diff line number Diff line
@@ -33,5 +33,6 @@ void mmc_gpio_set_cd_isr(struct mmc_host *host, 
			 irqreturn_t (*isr)(int irq, void *dev_id));

void mmc_gpiod_request_cd_irq(struct mmc_host *host);

bool mmc_can_gpio_cd(struct mmc_host *host);

bool mmc_can_gpio_ro(struct mmc_host *host);



#endif