This patch adds wakeup function support for egalax touch screen, if "wakeup-source" is added to device tree's egalax touch screen node, the wakeup function will be enabled, and egalax touch screen will be able to wakeup system from suspend.
Signed-off-by: Anson Huang <[email protected]> --- drivers/input/touchscreen/egalax_ts.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c index 80e69bb..74984ed 100644 --- a/drivers/input/touchscreen/egalax_ts.c +++ b/drivers/input/touchscreen/egalax_ts.c @@ -164,6 +164,7 @@ static int egalax_firmware_version(struct i2c_client *client) static int egalax_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { + struct device_node *np = client->dev.of_node; struct egalax_ts *ts; struct input_dev *input_dev; int error; @@ -224,6 +225,9 @@ static int egalax_ts_probe(struct i2c_client *client, if (error) return error; + if (of_property_read_bool(np, "wakeup-source")) + device_init_wakeup(&client->dev, true); + return 0; } @@ -241,6 +245,9 @@ static int __maybe_unused egalax_ts_suspend(struct device *dev) struct i2c_client *client = to_i2c_client(dev); int ret; + if (device_may_wakeup(dev)) + return enable_irq_wake(client->irq); + ret = i2c_master_send(client, suspend_cmd, MAX_I2C_DATA_LEN); return ret > 0 ? 0 : ret; } @@ -249,6 +256,9 @@ static int __maybe_unused egalax_ts_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + if (device_may_wakeup(dev)) + return 0; + return egalax_wake_up_device(client); } -- 2.7.4
