Messages in this thread Patch in this message | | | From | Roger Quadros <> | Subject | [PATCH v2 6/8] Input: pixcir_i2c_ts: Implement wakeup from suspend | Date | Wed, 26 Feb 2014 17:28:04 +0200 |
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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> --- drivers/input/touchscreen/pixcir_i2c_ts.c | 46 ++++++++++++++++++++++++++++--- 1 file changed, 42 insertions(+), 4 deletions(-)
diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c index b1e92f6..8ca258b 100644 --- a/drivers/input/touchscreen/pixcir_i2c_ts.c +++ b/drivers/input/touchscreen/pixcir_i2c_ts.c @@ -345,21 +345,59 @@ 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)) { + /* need to start device if not open, to be wakeup source */ + if (!input->users) { + ret = pixcir_start(ts); + if (ret) + goto unlock; + } - if (device_may_wakeup(&client->dev)) enable_irq_wake(client->irq); - return 0; + } else if (input->users) { + ret = pixcir_stop(ts); + } + +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; + + mutex_lock(&input->mutex); - if (device_may_wakeup(&client->dev)) + if (device_may_wakeup(&client->dev)) { disable_irq_wake(client->irq); - return 0; + /* need to stop device if it was not open on suspend */ + if (!input->users) { + ret = pixcir_stop(ts); + if (ret) + goto unlock; + } + + } else if (input->users) { + ret = pixcir_start(ts); + } + +unlock: + mutex_unlock(&input->mutex); + + return ret; } #endif -- 1.8.3.2
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