[PATCH] Input: ili210x: Enable suspend/resume functions

[Adam Ford <aford173@gmail.com>]

Some people may wish to wake their system from sleep, so this
patch enables a suspend and resume function which enables
and disables IRQ wake functions.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c
index 199cf3daec10..9b1a61447054 100644
--- a/drivers/input/touchscreen/ili210x.c
+++ b/drivers/input/touchscreen/ili210x.c
@@ -474,6 +474,28 @@ static int ili210x_i2c_probe(struct i2c_client *client,
 	return 0;
 }
 
+static int __maybe_unused ili210x_i2c_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	if (device_may_wakeup(&client->dev))
+		enable_irq_wake(client->irq);
+
+	return 0;
+}
+
+static int __maybe_unused ili210x_i2c_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	if (device_may_wakeup(&client->dev))
+		disable_irq_wake(client->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm, ili210x_i2c_suspend, ili210x_i2c_resume);
+
 static const struct i2c_device_id ili210x_i2c_id[] = {
 	{ "ili210x", (long)&ili210x_chip },
 	{ "ili2117", (long)&ili211x_chip },
@@ -495,6 +517,7 @@ MODULE_DEVICE_TABLE(of, ili210x_dt_ids);
 static struct i2c_driver ili210x_ts_driver = {
 	.driver = {
 		.name = "ili210x_i2c",
+		.pm = &ili210x_i2c_pm,
 		.of_match_table = ili210x_dt_ids,
 	},
 	.id_table = ili210x_i2c_id,
-- 
2.25.1