iot2050: Add watchdog start to bootcmd

Allows run-time control over watchdog auto-start and the timeout via
setting the environment variable watchdog_timeout_ms. A value of zero
means "do not start". Use CONFIG_WATCHDOG_TIMEOUT_MSECS as initial value
and this to zero by default. Users can then enable the watchdog once the
use and OS which picks it up during boot.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

diff --git a/board/siemens/iot2050/iot2050.env b/board/siemens/iot2050/iot2050.env
index 4bd93f0..0295879 100644 (file)
--- a/board/siemens/iot2050/iot2050.env
+++ b/board/siemens/iot2050/iot2050.env
@@ -7,3 +7,11 @@
  */
 
 usb_pgood_delay=900
+
+watchdog_timeout_ms=CONFIG_WATCHDOG_TIMEOUT_MSECS
+start_watchdog=
+       if test ${watchdog_timeout_ms} -gt 0; then
+               wdt dev watchdog@40610000;
+               wdt start ${watchdog_timeout_ms};
+               echo Watchdog started, timeout ${watchdog_timeout_ms} ms;
+       fi

diff --git a/configs/iot2050_pg1_defconfig b/configs/iot2050_pg1_defconfig
index 57a2a6d..3075021 100644 (file)
--- a/configs/iot2050_pg1_defconfig
+++ b/configs/iot2050_pg1_defconfig
@@ -32,6 +32,7 @@ CONFIG_DISTRO_DEFAULTS=y
 CONFIG_BOOTSTAGE=y
 CONFIG_SHOW_BOOT_PROGRESS=y
 CONFIG_SPL_SHOW_BOOT_PROGRESS=y
+CONFIG_BOOTCOMMAND="run start_watchdog; run distro_bootcmd"
 CONFIG_CONSOLE_MUX=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_MAX_SIZE=0x58000
@@ -140,6 +141,7 @@ CONFIG_USB_DWC3_GENERIC=y
 CONFIG_USB_KEYBOARD=y
 # CONFIG_WATCHDOG is not set
 # CONFIG_WATCHDOG_AUTOSTART is not set
+CONFIG_WATCHDOG_TIMEOUT_MSECS=0
 CONFIG_WDT=y
 CONFIG_WDT_K3_RTI=y
 CONFIG_WDT_K3_RTI_LOAD_FW=y

diff --git a/configs/iot2050_pg2_defconfig b/configs/iot2050_pg2_defconfig
index e3f82ad..2ff360b 100644 (file)
--- a/configs/iot2050_pg2_defconfig
+++ b/configs/iot2050_pg2_defconfig
@@ -34,6 +34,7 @@ CONFIG_OF_BOARD_SETUP=y
 CONFIG_BOOTSTAGE=y
 CONFIG_SHOW_BOOT_PROGRESS=y
 CONFIG_SPL_SHOW_BOOT_PROGRESS=y
+CONFIG_BOOTCOMMAND="run start_watchdog; run distro_bootcmd"
 CONFIG_CONSOLE_MUX=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_MAX_SIZE=0x58000
@@ -144,6 +145,7 @@ CONFIG_USB_DWC3_GENERIC=y
 CONFIG_USB_KEYBOARD=y
 # CONFIG_WATCHDOG is not set
 # CONFIG_WATCHDOG_AUTOSTART is not set
+CONFIG_WATCHDOG_TIMEOUT_MSECS=0
 CONFIG_WDT=y
 CONFIG_WDT_K3_RTI=y
 CONFIG_WDT_K3_RTI_LOAD_FW=y