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mmc: core: expose the capability of gpio card detect 

Add new helper API mmc_can_gpio_cd for slot-gpio to make
host drivers know whether it supports gpio card detect.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
hifive-unleashed-5.1
Shawn Lin 2016-10-12 10:50:37 +08:00 committed by Ulf Hansson
parent f90142683f
commit 50fcbbbb79
2 changed files with 9 additions and 0 deletions
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8
drivers/mmc/core/slot-gpio.c
View File

@ -258,6 +258,14 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
}
EXPORT_SYMBOL(mmc_gpiod_request_cd);
bool mmc_can_gpio_cd(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
return ctx->cd_gpio ? true : false;
}
EXPORT_SYMBOL(mmc_can_gpio_cd);
/**
* mmc_gpiod_request_ro - request a gpio descriptor for write protection
* @host: mmc host

1
include/linux/mmc/slot-gpio.h
View File

@ -29,5 +29,6 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
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);
#endif