1Specifying wakeup capability for devices 2============================================ 3 4Any device nodes 5---------------- 6Nodes that describe devices which has wakeup capability must contain an 7"wakeup-source" boolean property. 8 9Also, if device is marked as a wakeup source, then all the primary 10interrupt(s) can be used as wakeup interrupt(s). 11 12However if the devices have dedicated interrupt as the wakeup source 13then they need to specify/identify the same using device specific 14interrupt name. In such cases only that interrupt can be used as wakeup 15interrupt. 16 17List of legacy properties and respective binding document 18--------------------------------------------------------- 19 201. "enable-sdio-wakeup" Documentation/devicetree/bindings/mmc/mmc.txt 212. "gpio-key,wakeup" Documentation/devicetree/bindings/input/gpio-keys{,-polled}.txt 223. "has-tpo" Documentation/devicetree/bindings/rtc/rtc-opal.txt 234. "isil,irq2-can-wakeup-machine" Documentation/devicetree/bindings/rtc/isil,isl12057.txt 245. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt 25 Documentation/devicetree/bindings/mfd/tc3589x.txt 26 Documentation/devicetree/bindings/input/ads7846.txt 276. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt 287. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt 298. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt 30 31Examples 32-------- 33 341. With "wakeup" interrupt name 35 36 device@10000 { 37 compatible = "vendor,device-id"; 38 reg = <0x10000 0x1000>; 39 interrupts = <0 19 4>, <0 21 4>, <0 22 4>; 40 interrupt-names = "ack", "err", "wakeup"; 41 wakeup-source; 42 }; 43 442. Without "wakeup" interrupt name 45 46 embedded-controller { 47 compatible = "google,cros-ec-i2c"; 48 reg = <0x1e>; 49 interrupts = <6 0>; 50 interrupt-parent = <&gpx1>; 51 pinctrl-names = "default"; 52 pinctrl-0 = <&ec_irq>; 53 wakeup-source; 54 }; 55 563. Without interrupts 57 58 gpio_keys { 59 compatible = "gpio-keys"; 60 #address-cells = <1>; 61 #size-cells = <0>; 62 63 button@1 { 64 debounce_interval = <50>; 65 wakeup-source; 66 linux,code = <116>; 67 label = "POWER"; 68 gpios = <&iofpga_gpio0 0 0x4>; 69 }; 70 [....] 71 }; 72