1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index 1a94d8bfec54..21c74ee59341 100644
--- a/drivers/input/touchscreen/ar1021_i2c.c
+++ b/drivers/input/touchscreen/ar1021_i2c.c
@@ -18,6 +18,10 @@
 #define AR1021_MAX_X    4095
 #define AR1021_MAX_Y    4095
 
+#define AR1021_CMD      0x55
+
+#define AR1021_CMD_ENABLE_TOUCH         0x12
+
 struct ar1021_i2c {
         struct i2c_client *client;
         struct input_dev *input;
@@ -56,8 +60,19 @@ out:
 
 static int ar1021_i2c_open(struct input_dev *dev)
 {
+        static const u8 cmd_enable_touch[] = {
+                AR1021_CMD,
+                0x01, /* number of bytes after this */
+                AR1021_CMD_ENABLE_TOUCH
+        };
         struct ar1021_i2c *ar1021 = input_get_drvdata(dev);
         struct i2c_client *client = ar1021->client;
+        int error;
+
+        error = i2c_master_send(ar1021->client, cmd_enable_touch,
+                                sizeof(cmd_enable_touch));
+        if (error < 0)
+                return error;
 
         enable_irq(client->irq);