From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
To: lee.jones@linaro.org
Cc: sameo@linux.intel.com, broonie@kernel.org, lgirdwood@gmail.com,
patches@opensource.wolfsonmicro.com,
linux-kernel@vger.kernel.org
Subject: [PATCH 9/9] mfd: wm5110: Add delay before releasing reset line
Date: Wed, 8 Apr 2015 16:56:18 +0100 [thread overview]
Message-ID: <1428508578-21022-10-git-send-email-ckeepax@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1428508578-21022-1-git-send-email-ckeepax@opensource.wolfsonmicro.com>
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>
---
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 8ac8f9d..0a563ccf 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -259,6 +259,15 @@ 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:
+ msleep(5);
+ break;
+ default:
+ break;
+ }
+
gpio_set_value_cansleep(arizona->pdata.reset, 1);
msleep(1);
}
--
1.7.2.5
prev parent reply other threads:[~2015-04-08 16:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-08 15:56 [PATCH 0/9] wm5110 Boot Fixups Charles Keepax
2015-04-08 15:56 ` [PATCH 1/9] mfd: arizona: Use devres to manage reset GPIO Charles Keepax
2015-04-08 15:56 ` [PATCH 2/9] mfd: arizona: Factor out hard reset into helper functions Charles Keepax
2015-04-08 15:56 ` [PATCH 3/9] mfd: wm5102: Ensure we always boot the device fully Charles Keepax
2015-04-08 15:56 ` [PATCH 4/9] mfd: arizona: Factor out SYSCLK enable from wm5102 hardware patch Charles Keepax
2015-04-08 15:56 ` [PATCH 5/9] mfd: wm5110: Add register patch required for low power sleep Charles Keepax
2015-04-17 8:09 ` Charles Keepax
2015-04-08 15:56 ` [PATCH 6/9] regulator: arizona-ldo1: Add additional supported voltage Charles Keepax
2015-04-08 15:56 ` [PATCH 7/9] mfd: wm5110: Set DCVDD voltage to 1.175V before entering sleep mode Charles Keepax
2015-04-08 15:56 ` [PATCH 8/9] mfd: arizona: Add better support for system suspend Charles Keepax
2015-04-08 15:56 ` Charles Keepax [this message]
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