Input: ads7846 - cleanup GPIO initialization

Use gpio_request_one() instead of multiple gpiolib calls.
This also simplifies error handling a bit.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/ads7846.c

@@ -967,17 +967,12 @@ static int __devinit ads7846_setup_pendown(struct spi_device *spi, struct ads784
 		ts->get_pendown_state = pdata->get_pendown_state;
 	} else if (gpio_is_valid(pdata->gpio_pendown)) {
 
-		err = gpio_request(pdata->gpio_pendown, "ads7846_pendown");
+		err = gpio_request_one(pdata->gpio_pendown, GPIOF_IN,
+				       "ads7846_pendown");
 		if (err) {
-			dev_err(&spi->dev, "failed to request pendown GPIO%d\n",
-				pdata->gpio_pendown);
-			return err;
-		}
-		err = gpio_direction_input(pdata->gpio_pendown);
-		if (err) {
-			dev_err(&spi->dev, "failed to setup pendown GPIO%d\n",
-				pdata->gpio_pendown);
-			gpio_free(pdata->gpio_pendown);
+			dev_err(&spi->dev,
+				"failed to request/setup pendown GPIO%d: %d\n",
+				pdata->gpio_pendown, err);
 			return err;
 		}