mmc: sdhci-pci: Respect PM flags when enabling card detect GPIO IRQ wakeup

Commit 03dbaa04 ("mmc: slot-gpio: Add support to enable irq wake on
cd_irq") enabled wakeup at initialization. However, users also want to
control it from sysfs power/wakeup attribute. That means the driver needs
to check the PM flags before enabling it in the suspend callback. Add
support for that in sdhci-pci, which is the only driver presently using the
MMC_CAP_CD_WAKE flag, and remove the enabling in mmc_gpiod_request_cd_irq()
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/slot-gpio.c

@@ -149,8 +149,6 @@ 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);
 

drivers/mmc/host/sdhci-pci-core.c

@@ -41,18 +41,25 @@ static void sdhci_pci_hw_reset(struct sdhci_host *host);
 static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)
 {
 	mmc_pm_flag_t pm_flags = 0;
+	bool cap_cd_wake = false;
 	int i;
 
 	for (i = 0; i < chip->num_slots; i++) {
 		struct sdhci_pci_slot *slot = chip->slots[i];
 
-		if (slot)
+		if (slot) {
 			pm_flags |= slot->host->mmc->pm_flags;
+			if (slot->host->mmc->caps & MMC_CAP_CD_WAKE)
+				cap_cd_wake = true;
 		}
+	}
+
+	if ((pm_flags & MMC_PM_KEEP_POWER) && (pm_flags & MMC_PM_WAKE_SDIO_IRQ))
+		return device_wakeup_enable(&chip->pdev->dev);
+	else if (!cap_cd_wake)
+		return device_wakeup_disable(&chip->pdev->dev);
 
-	return device_set_wakeup_enable(&chip->pdev->dev,
-					(pm_flags & MMC_PM_KEEP_POWER) &&
-					(pm_flags & MMC_PM_WAKE_SDIO_IRQ));
+	return 0;
 }
 
 static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
@@ -76,6 +83,9 @@ static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
 		ret = sdhci_suspend_host(host);
 		if (ret)
 			goto err_pci_suspend;
+
+		if (device_may_wakeup(&chip->pdev->dev))
+			mmc_gpio_set_cd_wake(host->mmc, true);
 	}
 
 	return 0;
@@ -99,6 +109,8 @@ int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
 		ret = sdhci_resume_host(slot->host);
 		if (ret)
 			return ret;
+
+		mmc_gpio_set_cd_wake(slot->host->mmc, false);
 	}
 
 	return 0;
@@ -1698,6 +1710,9 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 	if (device_can_wakeup(&pdev->dev))
 		host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
 
+	if (host->mmc->caps & MMC_CAP_CD_WAKE)
+		device_init_wakeup(&pdev->dev, true);
+
 	if (slot->cd_idx >= 0) {
 		ret = mmc_gpiod_request_cd(host->mmc, NULL, slot->cd_idx,
 					   slot->cd_override_level, 0, NULL);