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authorAdrian Hunter <adrian.hunter@intel.com>2018-02-27 14:51:25 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2018-03-05 13:04:32 +0100
commit36f1d7e817a5540f6624ce1007339688bd443308 (patch)
treee3a6fea5947f33eef7eb2207675e85adcc93cf75 /drivers/mmc
parentd5d568fad9a52ac4eba5d9a080a5cddb8498fa5e (diff)
downloadlinux-36f1d7e817a5540f6624ce1007339688bd443308.tar.bz2
mmc: slot-gpio: Add a function to enable/disable card detect IRQ wakeup
Commit 03dbaa04a2e5 ("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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/core.c3
-rw-r--r--drivers/mmc/core/slot-gpio.c21
2 files changed, 22 insertions, 2 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index e01910dd964b..121ce50b6d5e 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -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);
}
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index 3698b0576009..dccbc52af5c4 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -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.
*/