board: ge: bx50v3: Enable hardware watchdog

Enable the hardware watchdog on bx50v3 to cause it to reset in the event the board hangs. Configure GPIO_9 pin as WDOG1_B so that a watchdog timeout results in a full system reset. The watchdog is used and reconfigured by systemd approximately 1.7 seconds into boot. Adding a few seconds for U-Boot and a few more seconds as a safety margin. Note that the PCIe controller is _not_ put back into a safe state prior to board reset. This is a problem if board reset is implemented as CPU reset. Signed-off-by: Ian Ray <[email protected]> Signed-off-by: Martyn Welch <[email protected]> Signed-off-by: Sebastian Reichel <[email protected]>
MrVan · Feb 4, 2018 · 6d65649 · 6d65649
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diff --git a/board/ge/bx50v3/bx50v3.c b/board/ge/bx50v3/bx50v3.c
@@ -659,6 +659,7 @@ static iomux_v3_cfg_t const misc_pads[] = {
 	MX6_PAD_EIM_OE__GPIO2_IO25	| MUX_PAD_CTRL(NC_PAD_CTRL),
 	MX6_PAD_EIM_BCLK__GPIO6_IO31	| MUX_PAD_CTRL(NC_PAD_CTRL),
 	MX6_PAD_GPIO_1__GPIO1_IO01	| MUX_PAD_CTRL(NC_PAD_CTRL),
+	MX6_PAD_GPIO_9__WDOG1_B         | MUX_PAD_CTRL(NC_PAD_CTRL),
 };
 #define SUS_S3_OUT	IMX_GPIO_NR(4, 11)
 #define WIFI_EN	IMX_GPIO_NR(6, 14)

diff --git a/include/configs/ge_bx50v3.h b/include/configs/ge_bx50v3.h
@@ -44,6 +44,10 @@
 #define CONFIG_REVISION_TAG
 #define CONFIG_SYS_MALLOC_LEN		(10 * SZ_1M)
 
+#define CONFIG_HW_WATCHDOG
+#define CONFIG_IMX_WATCHDOG
+#define CONFIG_WATCHDOG_TIMEOUT_MSECS 6000
+
 #define CONFIG_LAST_STAGE_INIT
 
 #define CONFIG_MXC_GPIO