From: 宋秀杰 <sxj@rock-chips.com>
Date: Thu, 16 Feb 2012 10:10:08 +0000 (+0800)
Subject: wm8994 add 50ms delay between wm_en and i2c read register in device setup
X-Git-Tag: firefly_0821_release~9618
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=525fdeba3fbe14b0617f0a86891323fd61bbdf70;p=firefly-linux-kernel-4.4.55.git

wm8994 add 50ms delay between wm_en and i2c read register in device setup
---

diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c
index 91c8043fc576..348bfa844439 100755
--- a/drivers/regulator/wm8994-regulator.c
+++ b/drivers/regulator/wm8994-regulator.c
@@ -21,6 +21,7 @@
 #include <linux/gpio.h>
 #include <linux/slab.h>
 
+#include <linux/delay.h>
 #include <linux/mfd/wm8994/core.h>
 #include <linux/mfd/wm8994/registers.h>
 #include <linux/mfd/wm8994/pdata.h>
@@ -258,6 +259,7 @@ static __devinit int wm8994_ldo_probe(struct platform_device *pdev)
 				ret);
 			goto err_gpio;
 		}
+		msleep(50);
 	} else
 		ldo->is_enabled = true;