diff options
| author | Sundar Iyer <sundar.iyer@stericsson.com> | 2010-11-24 12:31:55 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@stericsson.com> | 2011-09-19 16:00:14 +0200 |
| commit | 25d6e2fad92661e169809f9238ce56e4eda24727 (patch) | |
| tree | c1c5e3199827952db4bf15ed6c7c8814d77db924 | |
| parent | d675d2339b2867f2ae4ed59de5526e0d5a31912c (diff) | |
mfd/tc35892: 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.
ST-Ericsson ID: ER277334
Change-Id: Ia6727a1f268db0576f5eb40b5dc5c30f6abecba7
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
| -rw-r--r-- | drivers/mfd/tc35892.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/mfd/tc35892.c b/drivers/mfd/tc35892.c index c470917e288..33d44bbc731 100644 --- a/drivers/mfd/tc35892.c +++ b/drivers/mfd/tc35892.c @@ -234,12 +234,15 @@ static int tc35892_chip_init(struct tc35892 *tc35892) dev_info(tc35892->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 = tc35892_reg_write(tc35892, TC35892_RSTCTRL, TC35892_RSTCTRL_TIMRST | TC35892_RSTCTRL_ROTRST - | TC35892_RSTCTRL_KBDRST - | TC35892_RSTCTRL_GPIRST); + | TC35892_RSTCTRL_KBDRST); if (ret < 0) return ret; |