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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2015-05-11 13:58:10 +0100
committerLee Jones <lee.jones@linaro.org>2015-06-22 12:25:15 +0100
commit121c075c1f845c2e75d61a4e7aac92d05d2def6e (patch)
treee95636e04f76607fc9ecc92d0252203b3794945d /drivers/mfd
parente6cb73410a6db70eab266f15b7e25053a45b842d (diff)
downloadlinux-121c075c1f845c2e75d61a4e7aac92d05d2def6e.tar.bz2
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 <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/arizona-core.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 4f38ce654558..cb8a1b2f07f1 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);
}