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mmc: slot-gpio: Add a function to enable/disable card detect IRQ wakeup

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Commit 03dbaa04a2 ("mmc: slot-gpio: Add support to enable irq wake on
cd_irq") enabled wakeup at initialization. However drivers may wish to
enable and disable based on different criteria. Add a helper function
mmc_gpio_set_cd_wake() to make it easy for drivers to do that.

Signed-off-by: Adrian Hunter <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Adrian Hunter 2018-02-27 14:51:25 +02:00 • committed by Ulf Hansson
commit 36f1d7e817
3 changed files with 23 additions and 2 deletions
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3
drivers/mmc/core/core.c
View file

@ -2655,8 +2655,7 @@ void mmc_start_host(struct mmc_host *host)
void mmc_stop_host(struct mmc_host *host)
{
if (host->slot.cd_irq >= 0) {
if (host->slot.cd_wake_enabled)
disable_irq_wake(host->slot.cd_irq);
mmc_gpio_set_cd_wake(host, false);
disable_irq(host->slot.cd_irq);
}

21
drivers/mmc/core/slot-gpio.c
View file

@ -154,6 +154,27 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
}
EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);
int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on)
{
int ret = 0;
if (!(host->caps & MMC_CAP_CD_WAKE) ||
host->slot.cd_irq < 0 ||
on == host->slot.cd_wake_enabled)
return 0;
if (on) {
ret = enable_irq_wake(host->slot.cd_irq);
host->slot.cd_wake_enabled = !ret;
} else {
disable_irq_wake(host->slot.cd_irq);
host->slot.cd_wake_enabled = false;
}
return ret;
}
EXPORT_SYMBOL(mmc_gpio_set_cd_wake);
/* Register an alternate interrupt service routine for
* the card-detect GPIO.
*/