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Commit e55057e8 authored by Martin Kepplinger's avatar Martin Kepplinger Committed by Dmitry Torokhov
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Input: ar1021_i2c - enable touch mode during open 



The device could as well be in command mode, in which this driver cannot
handle the device. When opening the device, let's make sure the device
will be in the mode we expect it to be for this driver.

Signed-off-by: default avatarMartin Kepplinger <martin.kepplinger@ginzinger.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent aea415b1

drivers/input/touchscreen/ar1021_i2c.c

+15 −0
Original line number Diff line number Diff line
@@ -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 @@ static irqreturn_t ar1021_i2c_irq(int irq, void *dev_id) 


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);