@@ -8,9 +8,41 @@ Required properties:
- reg: physical base address of the controller and length of memory mapped
region
+Optional properties:
+
+ - aspeed,reset-type = "cpu|soc|system|none"
+
+ Reset behavior - Whenever a timeout occurs the watchdog can be programmed
+ to generate one of three different, mutually exclusive, types of resets.
+
+ Type "none" can be specified to indicate that no resets are to be done.
+ This is useful in situations where another watchdog engine on chip is
+ to perform the reset.
+
+ If 'aspeed,reset-type=' is not specfied the default is to enable system
+ reset.
+
+ Reset types:
+
+ - cpu: Reset CPU on watchdog timeout
+
+ - soc: Reset 'System on Chip' on watchdog timeout
+
+ - system: Reset system on watchdog timeout
+
+ - none: No reset is performed on timeout. Assumes another watchdog
+ engine is responsible for this.
+
+ - aspeed,external-signal: If property is present then signal is sent to
+ external reset counter (only WDT1 and WDT2). If not
+ specified no external signal is sent.
+ - aspeed,alt-boot: If property is present then boot from alternate block.
+
Example:
wdt1: watchdog@1e785000 {
compatible = "aspeed,ast2400-wdt";
reg = <0x1e785000 0x1c>;
+ aspeed,reset-type = "system";
+ aspeed,external-signal;
};