mmc: core: enable support for the standard "wakeup-source" property

Though the mmc core driver should/will continue to support the legacy
"enable-sdio-wakeup" property to enable SDIO as the wakeup source, we
need to add support for the new standard property "wakeup-source".

This patch adds support for "wakeup-source" property in addition to the
existing "enable-sdio-wakeup" property.

Cc: Adrian Hunter <[e-mail]>
Signed-off-by: Sudeep Holla <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/core/host.c

···
 		host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE;
 	if (of_property_read_bool(np, "keep-power-in-suspend"))
 		host->pm_caps |= MMC_PM_KEEP_POWER;
-	if (of_property_read_bool(np, "enable-sdio-wakeup"))
+	if (of_property_read_bool(np, "wakeup-source") ||
+	    of_property_read_bool(np, "enable-sdio-wakeup")) /* legacy */
 		host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
 	if (of_property_read_bool(np, "mmc-ddr-1_8v"))
 		host->caps |= MMC_CAP_1_8V_DDR;

drivers/mmc/host/sdhci-pltfm.c

···
 	if (of_find_property(np, "keep-power-in-suspend", NULL))
 		host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
 
-	if (of_find_property(np, "enable-sdio-wakeup", NULL))
+	if (of_property_read_bool(np, "wakeup-source") ||
+	    of_property_read_bool(np, "enable-sdio-wakeup")) /* legacy */
 		host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
 }
 #else