diff options
Diffstat (limited to 'Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt')
-rw-r--r-- | Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt new file mode 100644 index 0000000000..38e54b3fd9 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt @@ -0,0 +1,33 @@ +Binding for the LTC2952 PowerPath controller + +This chip is used to externally trigger a system shut down. Once the trigger has +been sent, the chip's watchdog has to be reset to gracefully shut down. +A full powerdown can be triggered via the kill signal. + +Required properties: + +- compatible: Must contain: "lltc,ltc2952" +- watchdog-gpios: phandle + gpio-specifier for the GPIO connected to the + chip's watchdog line +- kill-gpios: phandle + gpio-specifier for the GPIO connected to the + chip's kill line + +Optional properties: +- trigger-gpios: phandle + gpio-specifier for the GPIO connected to the + chip's trigger line. If this property is not set, the + trigger function is ignored and the chip is kept alive + until an explicit kill signal is received +- trigger-delay-ms The number of milliseconds to wait after trigger line + assertion before executing shut down procedure. + The default is 2500ms. + +Example: + +ltc2952 { + compatible = "lltc,ltc2952"; + + trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>; + trigger-delay-ms = <2000>; + watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>; + kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>; +}; |