diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt new file mode 100644 index 000000000..711a880b3 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -0,0 +1,51 @@ +* Atmel Watchdog Timers + +** at91sam9-wdt + +Required properties: +- compatible: must be "atmel,at91sam9260-wdt". +- reg: physical base address of the controller and length of memory mapped + region. +- clocks: phandle to input clock. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. +- interrupts : Should contain WDT interrupt. +- atmel,max-heartbeat-sec : Should contain the maximum heartbeat value in + seconds. This value should be less or equal to 16. It is used to + compute the WDV field. +- atmel,min-heartbeat-sec : Should contain the minimum heartbeat value in + seconds. This value must be smaller than the max-heartbeat-sec value. + It is used to compute the WDD field. +- atmel,watchdog-type : Should be "hardware" or "software". Hardware watchdog + use the at91 watchdog reset. Software watchdog use the watchdog + interrupt to trigger a software reset. +- atmel,reset-type : Should be "proc" or "all". + "all" : assert peripherals and processor reset signals + "proc" : assert the processor reset signal + This is valid only when using "hardware" watchdog. +- atmel,disable : Should be present if you want to disable the watchdog. +- atmel,idle-halt : Should be present if you want to stop the watchdog when + entering idle state. + CAUTION: This property should be used with care, it actually makes the + watchdog not counting when the CPU is in idle state, therefore the + watchdog reset time depends on mean CPU usage and will not reset at all + if the CPU stop working while it is in idle state, which is probably + not what you want. +- atmel,dbg-halt : Should be present if you want to stop the watchdog when + entering debug state. + +Example: + watchdog@fffffd40 { + compatible = "atmel,at91sam9260-wdt"; + reg = <0xfffffd40 0x10>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + clocks = <&clk32k>; + timeout-sec = <15>; + atmel,watchdog-type = "hardware"; + atmel,reset-type = "all"; + atmel,dbg-halt; + atmel,idle-halt; + atmel,max-heartbeat-sec = <16>; + atmel,min-heartbeat-sec = <0>; + }; |