From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
To: lee.jones@linaro.org
Cc: sameo@linux.intel.com, broonie@kernel.org,
patches@opensource.wolfsonmicro.com,
linux-kernel@vger.kernel.org
Subject: [PATCH 5/5] mfd: wm5110: Add delay before releasing reset line
Date: Tue, 24 Mar 2015 14:59:52 +0000 [thread overview]
Message-ID: <1427209192-12795-6-git-send-email-ckeepax@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1427209192-12795-1-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 c3973a0..4de5bf4 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -276,6 +276,15 @@ 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:[~2015-03-24 15:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 14:59 [PATCH 0/5] wm5110 Boot Fixups Part 2 Charles Keepax
2015-03-24 14:59 ` [PATCH 1/5] mfd: arizona: Add missing gpio_free in arizona_dev_exit Charles Keepax
2015-03-24 16:06 ` Mark Brown
2015-03-24 16:51 ` Charles Keepax
2015-03-24 14:59 ` [PATCH 2/5] mfd: wm5102: Move check for custom boot into arizona_wait_for_boot Charles Keepax
2015-03-24 14:59 ` [PATCH 3/5] mfd: arizona: Factor out hard reset into helper functions Charles Keepax
2015-03-24 14:59 ` [PATCH 4/5] mfd: arizona: Add better support for system suspend Charles Keepax
2015-03-24 14:59 ` Charles Keepax [this message]
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