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 <sameo@linux.intel.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>

1 files changed, 6 insertions, 3 deletions

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;