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mfd/tc3589x: undo gpio module reset during chip init

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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 <sameo@linux.intel.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
This commit is contained in:
Sundar Iyer 2010-12-13 09:33:17 +05:30 committed by Linus Walleij
parent bd77efd0ce
commit 523bc3820f
1 changed files with 6 additions and 3 deletions
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9
drivers/mfd/tc3589x.c
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@ -231,12 +231,15 @@ static int tc3589x_chip_init(struct tc3589x *tc3589x)
dev_info(tc3589x->dev, "manufacturer: %#x, version: %#x\n", manf, ver); 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, ret = tc3589x_reg_write(tc3589x, TC3589x_RSTCTRL,
TC3589x_RSTCTRL_TIMRST TC3589x_RSTCTRL_TIMRST
| TC3589x_RSTCTRL_ROTRST | TC3589x_RSTCTRL_ROTRST
| TC3589x_RSTCTRL_KBDRST | TC3589x_RSTCTRL_KBDRST);
| TC3589x_RSTCTRL_GPIRST);
if (ret < 0) if (ret < 0)
return ret; return ret;