[PATCH V3 07/13] iot2050: Add watchdog start to bootcmd

[Jan Kiszka]

From: Jan Kiszka <jan.kiszka at siemens.com>

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 at siemens.com>
---
 configs/iot2050_pg1_defconfig | 2 ++
 configs/iot2050_pg2_defconfig | 2 ++
 include/configs/iot2050.h     | 9 +++++++++
 3 files changed, 13 insertions(+)

diff --git a/configs/iot2050_pg1_defconfig b/configs/iot2050_pg1_defconfig
index 28930aac5eb..6c6af35cdee 100644
--- a/configs/iot2050_pg1_defconfig
+++ b/configs/iot2050_pg1_defconfig
@@ -32,6 +32,7 @@ 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
@@ -141,6 +142,7 @@ 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 c76abcca672..43410160c8a 100644
--- a/configs/iot2050_pg2_defconfig
+++ b/configs/iot2050_pg2_defconfig
@@ -32,6 +32,7 @@ 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
@@ -142,6 +143,7 @@ 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/include/configs/iot2050.h b/include/configs/iot2050.h
index 0f6150fc9c7..dc4b5f90595 100644
--- a/include/configs/iot2050.h
+++ b/include/configs/iot2050.h
@@ -15,6 +15,14 @@
 
 /* SPL Loader Configuration */
 
+#define WATCHDOG_ENV							\
+	"watchdog_timeout_ms=" __stringify(CONFIG_WATCHDOG_TIMEOUT_MSECS) "\0" \
+	"start_watchdog=if test ${watchdog_timeout_ms} -gt 0; then "	\
+		"wdt dev watchdog at 40610000; "				\
+		"wdt start ${watchdog_timeout_ms}; "			\
+		"echo Watchdog started, timeout ${watchdog_timeout_ms} ms; " \
+		"fi\0"
+
 /* U-Boot general configuration */
 #define EXTRA_ENV_IOT2050_BOARD_SETTINGS				\
 	"usb_pgood_delay=900\0"
@@ -43,6 +51,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS					\
 	DEFAULT_LINUX_BOOT_ENV						\
 	BOOTENV								\
+	WATCHDOG_ENV							\
 	EXTRA_ENV_IOT2050_BOARD_SETTINGS
 
 #include <configs/ti_armv7_common.h>
-- 
2.35.3