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Message-Id: <1431349090-24173-11-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date: Mon, 11 May 2015 13:58:10 +0100
From: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To: lee.jones@...aro.org
Cc: broonie@...nel.org, lgirdwood@...il.com, sameo@...ux.intel.com,
patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: [RESEND PATCH v3 10/10] 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@...nsource.wolfsonmicro.com>
Acked-by: Lee Jones <lee.jones@...aro.org>
---
drivers/mfd/arizona-core.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index f1ff68a..93e4d94 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);
}
--
1.7.2.5
--
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