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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>
This commit is contained in:
Martyn Welch 2018-01-10 20:31:32 +01:00 committed by Stefano Babic
parent 2850645cab
commit 6d6564957c
2 changed files with 5 additions and 0 deletions
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1
board/ge/bx50v3/bx50v3.c
View File

@ -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_OE__GPIO2_IO25 | MUX_PAD_CTRL(NC_PAD_CTRL),
MX6_PAD_EIM_BCLK__GPIO6_IO31 | 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_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 SUS_S3_OUT IMX_GPIO_NR(4, 11)
#define WIFI_EN IMX_GPIO_NR(6, 14) #define WIFI_EN IMX_GPIO_NR(6, 14)

4
include/configs/ge_bx50v3.h
View File

@ -44,6 +44,10 @@
#define CONFIG_REVISION_TAG #define CONFIG_REVISION_TAG
#define CONFIG_SYS_MALLOC_LEN (10 * SZ_1M) #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_LAST_STAGE_INIT
#define CONFIG_MXC_GPIO #define CONFIG_MXC_GPIO