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@seco.com Reviewed-by: Fabio Estevam fabio.estevam@freescale.com CC: Stefano Babic sbabic@denx.de CC: Fabio Estevam fabio.estevam@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 };