From 523bc3820f023169671e9726b8dc075669d14bec Mon Sep 17 00:00:00 2001 From: Sundar Iyer Date: Mon, 13 Dec 2010 09:33:17 +0530 Subject: mfd/tc3589x: undo gpio module reset during chip init 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. Acked-by: Samuel Ortiz Signed-off-by: Sundar Iyer Signed-off-by: Linus Walleij --- drivers/mfd/tc3589x.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/mfd') diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index 708349a5c0e3..f000d2ed23e0 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -231,12 +231,15 @@ 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; -- cgit v1.2.3