mmc: sdhci-omap: Configure optional wakeirq

Configure optional wakeirq. This may be optionally configured for SDIO
dat1 pin for wake-up events for SoCs that support deeper idle states.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20211015104720.52240-7-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 660f4d4..0dec2f8 100644 (file)
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -12,8 +12,10 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_wakeirq.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/sys_soc.h>
@@ -117,6 +119,7 @@ struct sdhci_omap_host {
 
        struct pinctrl          *pinctrl;
        struct pinctrl_state    **pinctrl_state;
+       int                     wakeirq;
        bool                    is_tuning;
 
        /* Offset for omap specific registers from base */
@@ -1358,6 +1361,25 @@ static int sdhci_omap_probe(struct platform_device *pdev)
        if (ret)
                goto err_cleanup_host;
 
+       /*
+        * SDIO devices can use the dat1 pin as a wake-up interrupt. Some
+        * devices like wl1xxx, use an out-of-band GPIO interrupt instead.
+        */
+       omap_host->wakeirq = of_irq_get_byname(dev->of_node, "wakeup");
+       if (omap_host->wakeirq == -EPROBE_DEFER) {
+               ret = -EPROBE_DEFER;
+               goto err_cleanup_host;
+       }
+       if (omap_host->wakeirq > 0) {
+               device_init_wakeup(dev, true);
+               ret = dev_pm_set_dedicated_wake_irq(dev, omap_host->wakeirq);
+               if (ret) {
+                       device_init_wakeup(dev, false);
+                       goto err_cleanup_host;
+               }
+               host->mmc->pm_caps |= MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
+       }
+
        pm_runtime_mark_last_busy(dev);
        pm_runtime_put_autosuspend(dev);
 
@@ -1385,6 +1407,8 @@ static int sdhci_omap_remove(struct platform_device *pdev)
 
        pm_runtime_get_sync(dev);
        sdhci_remove_host(host, true);
+       device_init_wakeup(dev, false);
+       dev_pm_clear_wake_irq(dev);
        pm_runtime_dont_use_autosuspend(dev);
        pm_runtime_put_sync(dev);
        /* Ensure device gets disabled despite userspace sysfs config */