[PATCH 3/5] mfd: wm5110: Add delay before releasing reset line on cold boot

[Charles Keepax <ckeepax@opensource.wolfsonmicro.com>]

On the first boot of the wm5110 it is important the reset line is held
for slightly longer to ensure the device starts up well. This patch adds
a 5mS delay for this.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 8f61ccf..1ecf9f5 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -784,6 +784,15 @@ int arizona_dev_init(struct arizona *arizona)
 		goto err_enable;
 	}
 
+	switch (arizona->type) {
+	case WM5110:
+	case WM8280:
+		msleep(5);
+		break;
+	default:
+		break;
+	}
+
 	if (arizona->pdata.reset) {
 		gpio_set_value_cansleep(arizona->pdata.reset, 1);
 		msleep(1);
-- 
1.7.2.5