Updated watchdog binding for Versal window watchdog.
Signed-off-by: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx>
---
.../devicetree/bindings/watchdog/of-xilinx-wdt.txt | 33 ++++++++++++++++++++--
1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
index c6ae9c9d5e3e..57903645d685 100644
--- a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
@@ -1,21 +1,37 @@
-Xilinx AXI/PLB soft-core watchdog Device Tree Bindings
----------------------------------------------------------
+Xilinx AXI/PLB soft-core watchdog and window watchdog Device Tree Bindings
+--------------------------------------------------------------------------
Required properties:
- compatible : Should be "xlnx,xps-timebase-wdt-1.00.a" or
- "xlnx,xps-timebase-wdt-1.01.a".
+ "xlnx,xps-timebase-wdt-1.01.a" or
+ "xlnx,versal-wwdt-1.0".
- reg : Physical base address and size
Optional properties:
- clocks : Input clock specifier. Refer to common clock
bindings.
- clock-frequency : Frequency of clock in Hz
+
+Optional properties for AXI/PLB soft-core watchdog:
- xlnx,wdt-enable-once : 0 - Watchdog can be restarted
1 - Watchdog can be enabled just once
- xlnx,wdt-interval : Watchdog timeout interval in 2^<val> clock cycles,
<val> is integer from 8 to 31.
+Optional properties for window watchdog:
+- timeout-sec : Watchdog timeout value (in seconds).
+ if unset, the default timeout is 10 seconds.
+- pretimeout-sec : Watchdog pretimeout value in seconds.
+- interrupts : IRQ line for the WWDT.
+- interrupt-names : Interrupt line names "wdt" or "wwdt_reset_pending".
+ wdt - will assert high after first (closed) window
+ timer expires. wwdt_reset_pending - will assert high
+ after second (open) window timer expires if WRP
+ (Watchdog Reset pending) is configured with third
+ (SST) timer.
+
Example:
+Xilinx AXI/PLB soft-core watchdog:
axi-timebase-wdt@40100000 {
clock-frequency = <50000000>;
compatible = "xlnx,xps-timebase-wdt-1.00.a";
@@ -24,3 +40,14 @@ axi-timebase-wdt@40100000 {
xlnx,wdt-enable-once = <0x0>;
xlnx,wdt-interval = <0x1b>;
} ;
+
+Xilinx Versal window watchdog:
+watchdog@fd4d0000 {
+ compatible = "xlnx,versal-wwdt-1.0";
+ reg = <0x0 0xfd4d0000 0x0 0x10000>;
+ clocks = <&clk25>;
+ timeout-sec = <10>;
+ interrupt-names = "wdt", "wwdt_reset_pending";
+ interrupts = <0x0 0x64 0x1>, <0x0 0x6D 0x1>;
+ pretimeout-sec = <5>;
+} ;
--
2.7.4
