[PATCH 12/20] mfd/tc3589x: undo gpio module reset during chip init
From: Sundar Iyer
Date: Fri Dec 03 2010 - 10:37:57 EST
Skip putting the GPIO module into a reset during the chip init. This makes
sure to preserve any existing GPIO configurations done by pre-kernel boot code.
Signed-off-by: Sundar Iyer <sundar.iyer@xxxxxxxxxxxxxx>
---
drivers/mfd/tc3589x.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
index e173f33..fd206fd 100644
--- a/drivers/mfd/tc3589x.c
+++ b/drivers/mfd/tc3589x.c
@@ -247,12 +247,15 @@ static int tc3589x_chip_init(struct tc3589x *tc3589x)
dev_info(tc3589x->dev, "manufacturer: %#x, version: %#x\n", manf, ver);
- /* Put everything except the IRQ module into reset */
+ /*
+ * Put everything except the IRQ module into reset;
+ * also spare the GPIO module for any pin initialization
+ * done during pre-kernel boot
+ */
ret = tc3589x_reg_write(tc3589x, TC3589x_RSTCTRL,
TC3589x_RSTCTRL_TIMRST
| TC3589x_RSTCTRL_ROTRST
- | TC3589x_RSTCTRL_KBDRST
- | TC3589x_RSTCTRL_GPIRST);
+ | TC3589x_RSTCTRL_KBDRST);
if (ret < 0)
return ret;
--
1.7.2.dirty
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