From 121c075c1f845c2e75d61a4e7aac92d05d2def6e Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Mon, 11 May 2015 13:58:10 +0100 Subject: [PATCH] mfd: wm5110: Add delay before releasing reset line On 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 Signed-off-by: Lee Jones --- drivers/mfd/arizona-core.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index 4f38ce6..cb8a1b2 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -259,6 +259,16 @@ static inline void arizona_enable_reset(struct arizona *arizona) static void arizona_disable_reset(struct arizona *arizona) { if (arizona->pdata.reset) { + switch (arizona->type) { + case WM5110: + case WM8280: + /* Meet requirements for minimum reset duration */ + msleep(5); + break; + default: + break; + } + gpio_set_value_cansleep(arizona->pdata.reset, 1); msleep(1); } -- 2.7.4