watchdog: Allow to use CONFIG_WDT without starting watchdog
In some cases it is useful to compile support for U-Boot command 'wdt'
without starting HW watchdog in early U-Boot phase. For example when the
user want to start the watchdog only on demand by some boot script.
This change adds a new compile option WATCHDOG_AUTOSTART to control whether
U-Boot should automatically start the watchdog during init phase or not.
This option is enabled by default as it was the default behavior prior
introducing this new change. When compiling U-Boot users can decide to turn
this option off.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 602ccbe..aa76a8f 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -9,6 +9,19 @@
this option if you want to service enabled watchdog by U-Boot. Disable
this option if you want U-Boot to start watchdog but never service it.
+config WATCHDOG_AUTOSTART
+ bool "Automatically start watchdog timer"
+ depends on WDT
+ default y
+ help
+ Automatically start watchdog timer and start servicing it during
+ init phase. Enabled by default. Disable this option if you want
+ to compile U-Boot with CONFIG_WDT support but do not want to
+ activate watchdog, like when CONFIG_WDT option is disabled. You
+ would be able to start watchdog manually by 'wdt' command. Useful
+ when you want to have support for 'wdt' command but do not want
+ to have watchdog enabled by default.
+
config WATCHDOG_TIMEOUT_MSECS
int "Watchdog timeout in msec"
default 128000 if ARCH_MX25 || ARCH_MX31 || ARCH_MX5 || ARCH_MX6