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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt b/kernel/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt new file mode 100644 index 000000000..af25e77c0 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/power_supply/qnap-poweroff.txt @@ -0,0 +1,16 @@ +* QNAP Power Off + +QNAP NAS devices have a microcontroller controlling the main power +supply. This microcontroller is connected to UART1 of the Kirkwood and +Orion5x SoCs. Sending the character 'A', at 19200 baud, tells the +microcontroller to turn the power off. This driver adds a handler to +pm_power_off which is called to turn the power off. + +Synology NAS devices use a similar scheme, but a different baud rate, +9600, and a different character, '1'. + +Required Properties: +- compatible: Should be "qnap,power-off" or "synology,power-off" + +- reg: Address and length of the register set for UART1 +- clocks: tclk clock |