mmc: sdhci-esdhc-imx: Enable support for system wakeup for SDIO

Enable support for system wakeup, by setting the wakeup capability for the
slot corresponding to the SDIO card. Users need to enable the wakeup
through the sysfs interface.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/1623326486-25275-1-git-send-email-haibo.chen@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-esdhc-imx.c

@@ -1620,6 +1620,14 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (err)
 		goto disable_ahb_clk;
 
+	/*
+	 * Setup the wakeup capability here, let user to decide
+	 * whether need to enable this wakeup through sysfs interface.
+	 */
+	if ((host->mmc->pm_caps & MMC_PM_KEEP_POWER) &&
+			(host->mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ))
+		device_set_wakeup_capable(&pdev->dev, true);
+
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
 	pm_runtime_use_autosuspend(&pdev->dev);