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Input: pixcir_i2c_ts - implement wakeup from suspend 

Improve the suspend and resume handlers to allow the device
to wakeup the system from suspend.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Roger Quadros 2014-05-18 22:49:20 -07:00 committed by Dmitry Torokhov
parent 0dfc8d41bf
commit 7cdcb8d104
1 changed files with 43 additions and 4 deletions
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47
drivers/input/touchscreen/pixcir_i2c_ts.c
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@ -264,21 +264,59 @@ static void pixcir_input_close(struct input_dev *dev)
static int pixcir_i2c_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
mutex_lock(&input->mutex);
if (device_may_wakeup(&client->dev)) {
if (!input->users) {
ret = pixcir_start(ts);
if (ret) {
dev_err(dev, "Failed to start\n");
goto unlock;
}
}
if (device_may_wakeup(&client->dev))
enable_irq_wake(client->irq);
} else if (input->users) {
ret = pixcir_stop(ts);
}
return 0;
unlock:
mutex_unlock(&input->mutex);
return ret;
}
static int pixcir_i2c_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct pixcir_i2c_ts_data *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
int ret = 0;
if (device_may_wakeup(&client->dev))
mutex_lock(&input->mutex);
if (device_may_wakeup(&client->dev)) {
disable_irq_wake(client->irq);
return 0;
if (!input->users) {
ret = pixcir_stop(ts);
if (ret) {
dev_err(dev, "Failed to stop\n");
goto unlock;
}
}
} else if (input->users) {
ret = pixcir_start(ts);
}
unlock:
mutex_unlock(&input->mutex);
return ret;
}
#endif
@ -366,6 +404,7 @@ static int pixcir_i2c_ts_probe(struct i2c_client *client,
if (error)
return error;
i2c_set_clientdata(client, tsdata);
device_init_wakeup(&client->dev, 1);
return 0;