mmc: at91_mci: wakeup on card insertion (or removal)

This piece of code enable the system to be wake-up by a card insertion or removal.

Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 28c881895ab..15aab374127 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -903,8 +903,10 @@ static int __init at91_mci_probe(struct platform_device *pdev)
         /*
          * Add host to MMC layer
          */
-        if (host->board->det_pin)
+        if (host->board->det_pin) {
                 host->present = !at91_get_gpio_value(host->board->det_pin);
+                device_init_wakeup(&pdev->dev, 1);
+        }
         else
                 host->present = -1;
 
@@ -940,6 +942,7 @@ static int __exit at91_mci_remove(struct platform_device *pdev)
         host = mmc_priv(mmc);
 
         if (host->present != -1) {
+                device_init_wakeup(&pdev->dev, 0);
                 free_irq(host->board->det_pin, host);
                 cancel_delayed_work(&host->mmc->detect);
         }
@@ -966,8 +969,12 @@ static int __exit at91_mci_remove(struct platform_device *pdev)
 static int at91_mci_suspend(struct platform_device *pdev, pm_message_t state)
 {
         struct mmc_host *mmc = platform_get_drvdata(pdev);
+        struct at91mci_host *host = mmc_priv(mmc);
         int ret = 0;
 
+        if (device_may_wakeup(&pdev->dev))
+                enable_irq_wake(host->board->det_pin);
+
         if (mmc)
                 ret = mmc_suspend_host(mmc, state);
 
@@ -977,8 +984,12 @@ static int at91_mci_suspend(struct platform_device *pdev, pm_message_t state)
 static int at91_mci_resume(struct platform_device *pdev)
 {
         struct mmc_host *mmc = platform_get_drvdata(pdev);
+        struct at91mci_host *host = mmc_priv(mmc);
         int ret = 0;
 
+        if (device_may_wakeup(&pdev->dev))
+                disable_irq_wake(host->board->det_pin);
+
         if (mmc)
                 ret = mmc_resume_host(mmc);