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Diffstat (limited to 'Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt')
-rw-r--r-- | Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt deleted file mode 100644 index 3208adb3e5..0000000000 --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt +++ /dev/null @@ -1,73 +0,0 @@ -Aspeed Watchdog Timer - -Required properties: - - compatible: must be one of: - - "aspeed,ast2400-wdt" - - "aspeed,ast2500-wdt" - - "aspeed,ast2600-wdt" - - - 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 specified 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,alt-boot: If property is present then boot from alternate block. - - 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,ext-pulse-duration: External signal pulse duration in microseconds - -Optional properties for AST2500-compatible watchdogs: - - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's - drive type to push-pull. The default is open-drain. - - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin - is configured as push-pull, then set the pulse - polarity to active-high. The default is active-low. - -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"; - reg = <0x1e785000 0x1c>; - 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)>; - }; |