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 <ian.ray@ge.com>
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

diff --git a/board/ge/bx50v3/bx50v3.c b/board/ge/bx50v3/bx50v3.c
index 07b4298..48c26e0 100644 (file)
--- 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
index 92b747b..596b1af 100644 (file)
--- 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