- SBSA (Server Base System Architecture) Generic Watchdog
The SBSA Generic Watchdog Timer is used to force a reset of the system
after two stages of timeout have elapsed. A detailed definition of the
watchdog timer can be found in the ARM document: ARM-DEN-0029 - Server
Base System Architecture (SBSA)
Required properties:
compatible: Should at least contain “arm,sbsa-gwdt”.
reg: Each entry specifies the base physical address of a register frame
and the length of that frame; currently, two frames must be defined,
in this order:
1: Watchdog control frame;
2: Refresh frame.interrupts: Should contain the Watchdog Signal 0 (WS0) SPI (Shared
Peripheral Interrupt) number of SBSA Generic Watchdog.
Optional properties
- timeout-sec: Watchdog timeout values (in seconds).
Example for FVP Foundation Model v8:
watchdog@2a440000 {
compatible = “arm,sbsa-gwdt”;
reg = <0x0 0x2a440000 0 0x1000>,
<0x0 0x2a450000 0 0x1000>;
interrupts = <0 27 4>;
timeout-sec = <30>;
};
