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mmc: slot-gpio: Add support to enable irq wake on cd_irq 

Add host capability MMC_CAP_CD_WAKE to enable irq wake on the card detect
irq.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2017-06-13 15:07:51 +03:00 committed by Ulf Hansson
parent d2a47176a8
commit 03dbaa04a2
3 changed files with 8 additions and 1 deletions
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5
drivers/mmc/core/core.c
View File

@ -2652,8 +2652,11 @@ void mmc_stop_host(struct mmc_host *host)
host->removed = 1;
spin_unlock_irqrestore(&host->lock, flags);
#endif
if (host->slot.cd_irq >= 0)
if (host->slot.cd_irq >= 0) {
if (host->slot.cd_wake_enabled)
disable_irq_wake(host->slot.cd_irq);
disable_irq(host->slot.cd_irq);
}
host->rescan_disable = 1;
cancel_delayed_work_sync(&host->detect);

2
drivers/mmc/core/slot-gpio.c
View File

@ -151,6 +151,8 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
if (irq < 0)
host->caps |= MMC_CAP_NEEDS_POLL;
else if ((host->caps & MMC_CAP_CD_WAKE) && !enable_irq_wake(irq))
host->slot.cd_wake_enabled = true;
}
EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);

2
include/linux/mmc/host.h
View File

@ -185,6 +185,7 @@ struct mmc_async_req {
*/
struct mmc_slot {
int cd_irq;
bool cd_wake_enabled;
void *handler_priv;
};
@ -275,6 +276,7 @@ struct mmc_host {
#define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */
#define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */
#define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */
#define MMC_CAP_CD_WAKE (1 << 28) /* Enable card detect wake */
#define MMC_CAP_CMD_DURING_TFR (1 << 29) /* Commands during data transfer */
#define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */
#define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */