From: Roger Quadros <rogerq@ti.com>
Date: Mon, 19 May 2014 05:49:20 +0000 (-0700)
Subject: Input: pixcir_i2c_ts - implement wakeup from suspend
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7cdcb8d104e6f0ec5d253d29e4849cdb2cf03aed;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

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>
---

diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c
index f2c0ae18e24a..19c6c0fdc94b 100644
--- a/drivers/input/touchscreen/pixcir_i2c_ts.c
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -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;
+
+	mutex_lock(&input->mutex);
 
-	if (device_may_wakeup(&client->dev))
+	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;