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mmc: slot-gpio: Add debouncing capability to mmc_gpio_request_cd()

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Add a debounce parameter to the mmc_gpio_request_cd() function that
enables GPIO debouncing when set to a non-zero value. This can be used
by MMC host drivers to enable debouncing on the card detect signal.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Laurent Pinchart 2013-08-08 12:38:31 +02:00 • committed by Chris Ball
parent 7725a52c03
commit 214fc309d1
10 changed files with 25 additions and 10 deletions
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3
include/linux/mmc/slot-gpio.h
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@ -18,7 +18,8 @@ int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio);
void mmc_gpio_free_ro(struct mmc_host *host);
int mmc_gpio_get_cd(struct mmc_host *host);
int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio);
int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
unsigned int debounce);
void mmc_gpio_free_cd(struct mmc_host *host);
#endif