Input: ads7864 - check return value of regulator enable

At least print a warning if we can't power the device up.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 4f702b3..434c3df 100644 (file)
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -236,7 +236,12 @@ static void __ads7846_disable(struct ads7846 *ts)
 /* Must be called with ts->lock held */
 static void __ads7846_enable(struct ads7846 *ts)
 {
-       regulator_enable(ts->reg);
+       int error;
+
+       error = regulator_enable(ts->reg);
+       if (error != 0)
+               dev_err(&ts->spi->dev, "Failed to enable supply: %d\n", error);
+
        ads7846_restart(ts);
 }