Input: ar1021_i2c - enable touch mode during open

[sfrench/cifs-2.6.git] / drivers / input / touchscreen / ar1021_i2c.c

diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index 1a94d8bfec54b2b115924b4bff9f5ddfe47272ed..21c74ee59341ef166da5177066aec73d16390a2b 100644 (file)
--- 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);