From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Mon, 4 Mar 2013 04:19:07 +0000 (-0800)
Subject: Input: ads7864 - check return value of regulator enable
X-Git-Tag: v3.9~24^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f94352f8db97b9a3b3c1ec45f6fef1400880168a;p=platform%2Fkernel%2Flinux-amlogic.git

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
--- 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);
 }