@@ -17,6 +17,10 @@ Optional Properties:
- always-running: If the watchdog timer cannot be disabled, add this flag to
have the driver keep toggling the signal without a client. It will only cease
to toggle the signal when the device is open and the timeout elapsed.
+- clock-names: May contain the entry "delay" if the board has logic
+ that delays the reset signal from the watchdog and which requires an
+ external signal to function.
+- clocks: Phandles corresponding to the clock-names.
Example:
watchdog: watchdog {
@@ -25,4 +29,6 @@ Example:
gpios = <&gpio3 9 GPIO_ACTIVE_LOW>;
hw_algo = "toggle";
hw_margin_ms = <1600>;
+ clock-names = "delay";
+ clocks = <&rtc 1>;
};
[DO NOT MERGE - see cover letter] We have a board where the reset output from the ADM706S is split in two: directly routed to an interrupt, and also to start a ripple counter, which 64 ms later than pulls the SOC's reset pin. That ripple counter only works if the RTC's 32kHz output is enabled, and since linux by default disables unused clocks, that effectively renders the watchdog useless. So add an optional "delay" clock binding. Suggested-by: Arnd Bergmann <arnd@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> --- Documentation/devicetree/bindings/watchdog/gpio-wdt.txt | 6 ++++++ 1 file changed, 6 insertions(+)