On Thu, Apr 27, 2017 at 02:22:35PM +0200, Martin Kepplinger wrote:
> 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: Martin Kepplinger <martin.kepplinger@xxxxxxxxxxxxx>
> ---
> drivers/input/touchscreen/ar1021_i2c.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
> index 1a94d8b..2a76231 100644
> --- a/drivers/input/touchscreen/ar1021_i2c.c
> +++ b/drivers/input/touchscreen/ar1021_i2c.c
> @@ -18,6 +18,12 @@
> #define AR1021_MAX_X 4095
> #define AR1021_MAX_Y 4095
>
> +#define AR1021_CMD 0x55
> +#define AR1021_TOUCH 0x80
> +
> +#define AR1021_CMD_ENABLE_TOUCH 0x12
> +#define AR1021_CMD_DISABLE_TOUCH 0x13
> +
> struct ar1021_i2c {
> struct i2c_client *client;
> struct input_dev *input;
> @@ -58,6 +64,15 @@ static int ar1021_i2c_open(struct input_dev *dev)
> {
> struct ar1021_i2c *ar1021 = input_get_drvdata(dev);
> struct i2c_client *client = ar1021->client;
> + int error;
> + u8 cmd_enable_touch[3] = {AR1021_CMD,
> + 0x01, /* number of bytes after this */
> + AR1021_CMD_ENABLE_TOUCH };
Changed to static const and applied, thank you.
> +
> + error = i2c_master_send(ar1021->client, cmd_enable_touch,
> + sizeof(cmd_enable_touch));
> + if (error < 0)
> + return error;
>
> enable_irq(client->irq);
>
> --
> 2.1.4
>
--
Dmitry
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