extcon: palams: add support for suspend/resume

Add suspend/resume callbacks and support for wakeup from
suspend on USB HOST or USB Device cable insertion or removal.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>

1 files changed, 35 insertions, 3 deletions

diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index ef77a461ca39..d0ce0f16de70 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -181,7 +181,8 @@ static int palmas_usb_probe(struct platform_device *pdev)
 
         status = devm_request_threaded_irq(palmas_usb->dev, palmas_usb->id_irq,
                         NULL, palmas_id_irq_handler,
-                        IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+                        IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+                        IRQF_ONESHOT | IRQF_EARLY_RESUME,
                         "palmas_usb_id", palmas_usb);
         if (status < 0) {
                 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
@@ -191,7 +192,8 @@ static int palmas_usb_probe(struct platform_device *pdev)
 
         status = devm_request_threaded_irq(palmas_usb->dev,
                         palmas_usb->vbus_irq, NULL, palmas_vbus_irq_handler,
-                        IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+                        IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+                        IRQF_ONESHOT | IRQF_EARLY_RESUME,
                         "palmas_usb_vbus", palmas_usb);
         if (status < 0) {
                 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
@@ -200,7 +202,7 @@ static int palmas_usb_probe(struct platform_device *pdev)
         }
 
         palmas_enable_irq(palmas_usb);
-
+        device_set_wakeup_capable(&pdev->dev, true);
         return 0;
 
 fail_extcon:
@@ -218,6 +220,35 @@ static int palmas_usb_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int palmas_usb_suspend(struct device *dev)
+{
+        struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
+
+        if (device_may_wakeup(dev)) {
+                enable_irq_wake(palmas_usb->vbus_irq);
+                enable_irq_wake(palmas_usb->id_irq);
+        }
+        return 0;
+}
+
+static int palmas_usb_resume(struct device *dev)
+{
+        struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
+
+        if (device_may_wakeup(dev)) {
+                disable_irq_wake(palmas_usb->vbus_irq);
+                disable_irq_wake(palmas_usb->id_irq);
+        }
+        return 0;
+};
+#endif
+
+static const struct dev_pm_ops palmas_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(palmas_usb_suspend,
+                                palmas_usb_resume)
+};
+
 static struct of_device_id of_palmas_match_tbl[] = {
         { .compatible = "ti,palmas-usb", },
         { .compatible = "ti,twl6035-usb", },
@@ -231,6 +262,7 @@ static struct platform_driver palmas_usb_driver = {
                 .name = "palmas-usb",
                 .of_match_table = of_palmas_match_tbl,
                 .owner = THIS_MODULE,
+                .pm = &palmas_pm_ops,
         },
 };