diff options
| author | Zev Weiss <zev@bewilderbeest.net> | 2023-09-22 03:42:33 -0700 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2023-10-29 19:45:10 +0100 |
| commit | 9931be2cfca35be7040f35a272a7b82b31ec1c71 (patch) | |
| tree | 8790e978dc4d5dd8d4a4ffb3d12f74c7d79e7e8f /Documentation/devicetree/bindings/watchdog | |
| parent | 78ca4d6902f4a9631ab74cc96d485eb1f1e5fac9 (diff) | |
dt-bindings: watchdog: aspeed-wdt: Add aspeed,reset-mask property
This property configures the Aspeed watchdog timer's reset mask, which
controls which peripherals are reset when the watchdog timer expires.
Some platforms require that certain devices be left untouched across a
reboot; aspeed,reset-mask can now be used to express such constraints.
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230922104231.1434-5-zev@bewilderbeest.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'Documentation/devicetree/bindings/watchdog')
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt index a8197632d6d2..3208adb3e52e 100644 --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -47,7 +47,15 @@ Optional properties for AST2500-compatible watchdogs: is configured as push-pull, then set the pulse polarity to active-high. The default is active-low. -Example: +Optional properties for AST2500- and AST2600-compatible watchdogs: + - aspeed,reset-mask: A bitmask indicating which peripherals will be reset if + the watchdog timer expires. On AST2500 this should be a + single word defined using the AST2500_WDT_RESET_* macros; + on AST2600 this should be a two-word array with the first + word defined using the AST2600_WDT_RESET1_* macros and the + second word defined using the AST2600_WDT_RESET2_* macros. + +Examples: wdt1: watchdog@1e785000 { compatible = "aspeed,ast2400-wdt"; @@ -55,3 +63,11 @@ Example: aspeed,reset-type = "system"; aspeed,external-signal; }; + + #include <dt-bindings/watchdog/aspeed-wdt.h> + wdt2: watchdog@1e785040 { + compatible = "aspeed,ast2600-wdt"; + reg = <0x1e785040 0x40>; + aspeed,reset-mask = <AST2600_WDT_RESET1_DEFAULT + (AST2600_WDT_RESET2_DEFAULT & ~AST2600_WDT_RESET2_LPC)>; + }; |