Input: axp20x-pek - add wakeup support

At least on devices with the AXP288 PMIC the device is expected to
wakeup from suspend when the power-button gets pressed, add support
for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index f11807d..d3e9ce2 100644 (file)
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -253,6 +253,9 @@ static int axp20x_pek_probe_input_device(struct axp20x_pek *axp20x_pek,
                return error;
        }
 
+       if (axp20x_pek->axp20x->variant == AXP288_ID)
+               enable_irq_wake(axp20x_pek->irq_dbr);
+
        return 0;
 }
 
@@ -301,10 +304,35 @@ static int axp20x_pek_probe(struct platform_device *pdev)
        return 0;
 }
 
+static int __maybe_unused axp20x_pek_resume_noirq(struct device *dev)
+{
+       struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
+
+       if (axp20x_pek->axp20x->variant != AXP288_ID)
+               return 0;
+
+       /*
+        * Clear interrupts from button presses during suspend, to avoid
+        * a wakeup power-button press getting reported to userspace.
+        */
+       regmap_write(axp20x_pek->axp20x->regmap,
+                    AXP20X_IRQ1_STATE + AXP288_IRQ_POKN / 8,
+                    BIT(AXP288_IRQ_POKN % 8));
+
+       return 0;
+}
+
+static const struct dev_pm_ops axp20x_pek_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+       .resume_noirq = axp20x_pek_resume_noirq,
+#endif
+};
+
 static struct platform_driver axp20x_pek_driver = {
        .probe          = axp20x_pek_probe,
        .driver         = {
                .name           = "axp20x-pek",
+               .pm             = &axp20x_pek_pm_ops,
        },
 };
 module_platform_driver(axp20x_pek_driver);