mmc: slot-gpio: Add a function to enable/disable card detect IRQ wakeup
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 <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -2655,8 +2655,7 @@ void mmc_start_host(struct mmc_host *host)
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void mmc_stop_host(struct mmc_host *host)
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{
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if (host->slot.cd_irq >= 0) {
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if (host->slot.cd_wake_enabled)
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disable_irq_wake(host->slot.cd_irq);
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mmc_gpio_set_cd_wake(host, false);
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disable_irq(host->slot.cd_irq);
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}
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@ -154,6 +154,27 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
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}
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EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);
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int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on)
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{
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int ret = 0;
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if (!(host->caps & MMC_CAP_CD_WAKE) ||
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host->slot.cd_irq < 0 ||
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on == host->slot.cd_wake_enabled)
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return 0;
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if (on) {
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ret = enable_irq_wake(host->slot.cd_irq);
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host->slot.cd_wake_enabled = !ret;
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} else {
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disable_irq_wake(host->slot.cd_irq);
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host->slot.cd_wake_enabled = false;
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}
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return ret;
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}
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EXPORT_SYMBOL(mmc_gpio_set_cd_wake);
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/* Register an alternate interrupt service routine for
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* the card-detect GPIO.
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*/
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@ -31,6 +31,7 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
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unsigned int debounce, bool *gpio_invert);
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void mmc_gpio_set_cd_isr(struct mmc_host *host,
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irqreturn_t (*isr)(int irq, void *dev_id));
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int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on);
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void mmc_gpiod_request_cd_irq(struct mmc_host *host);
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bool mmc_can_gpio_cd(struct mmc_host *host);
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bool mmc_can_gpio_ro(struct mmc_host *host);
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