From: Chris Zhong <zyw@rock-chips.com>
Date: Wed, 26 Aug 2015 09:54:55 +0000 (+0800)
Subject: rk808: fix a err when no sleep pin in dts
X-Git-Tag: firefly_0821_release~3797
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=83e9a56bb115ffa925ab515ed29fa41bc81849a2;p=firefly-linux-kernel-4.4.55.git

rk808: fix a err when no sleep pin in dts

Rk808 will data abort if it has not sleep gpio in dts, and there is no
pmic_sleep_gpio for some board, add a validity checking before
gpio_request can fix this data abort.

Change-Id: Ic2b40f7bfb00e95d283dce72a33dd844cc2c7e27
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---

diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 592bc3de7dce..5b22ce0a13cf 100755
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -1399,7 +1399,7 @@ static int rk808_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *i
 	/******************************set sleep vol & dcdc mode******************/
 	#ifdef CONFIG_OF
 	rk808->pmic_sleep_gpio = pdev->pmic_sleep_gpio;
-	if (rk808->pmic_sleep_gpio) {
+	if (gpio_is_valid(rk808->pmic_sleep_gpio)) {
 			ret = gpio_request(rk808->pmic_sleep_gpio, "rk808_pmic_sleep");
 			if (ret < 0) {
 				dev_err(rk808->dev,"Failed to request gpio %d with ret:""%d\n",	rk808->pmic_sleep_gpio, ret);