[U-Boot] [PATCH v2 4/4] udoo: Fix watchdog during kernel boot.

[Giuseppe Pagano]

uDoo uses APX823-31W5 watchdog chip. Timeout is about 1.2 seconds.
To disabled watchdog during kernel boot, WDI pin of that chip needs to be
in "high impedance" state. I.mx6 gpio configuration does not contemplate
tristate, so pin is set as input in high impedance.

Signed-off-by: Giuseppe Pagano <giuseppe.pagano at seco.com>
Reviewed-by: Fabio Estevam <fabio.estevam at freescale.com>
CC: Stefano Babic <sbabic at denx.de>
CC: Fabio Estevam <fabio.estevam at freescale.com>

---
Changes in v2:
  - None

 board/udoo/udoo.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/board/udoo/udoo.c b/board/udoo/udoo.c
index 64cb8d4..8ac9072 100644
--- a/board/udoo/udoo.c
+++ b/board/udoo/udoo.c
@@ -169,6 +169,7 @@ static void setup_iomux_wdog(void)
 	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
 	gpio_direction_output(WDT_TRG, 0);
 	gpio_direction_output(WDT_EN, 1);
+	gpio_direction_input(WDT_TRG);
 }
 
 static struct fsl_esdhc_cfg usdhc_cfg = { USDHC3_BASE_ADDR };
-- 
1.7.10.4