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. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt 24 Documentation/devicetree/bindings/mfd/tc3589x.txt 25 Documentation/devicetree/bindings/input/touchscreen/ads7846.txt 265. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt 276. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt 287. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt 29 30Examples 31-------- 32 331. With "wakeup" interrupt name 34 35 device@10000 { 36 compatible = "vendor,device-id"; 37 reg = <0x10000 0x1000>; 38 interrupts = <0 19 4>, <0 21 4>, <0 22 4>; 39 interrupt-names = "ack", "err", "wakeup"; 40 wakeup-source; 41 }; 42 432. Without "wakeup" interrupt name 44 45 embedded-controller { 46 compatible = "google,cros-ec-i2c"; 47 reg = <0x1e>; 48 interrupts = <6 0>; 49 interrupt-parent = <&gpx1>; 50 pinctrl-names = "default"; 51 pinctrl-0 = <&ec_irq>; 52 wakeup-source; 53 }; 54 553. Without interrupts 56 57 gpio_keys { 58 compatible = "gpio-keys"; 59 #address-cells = <1>; 60 #size-cells = <0>; 61 62 button@1 { 63 debounce-interval = <50>; 64 wakeup-source; 65 linux,code = <116>; 66 label = "POWER"; 67 gpios = <&iofpga_gpio0 0 0x4>; 68 }; 69 [....] 70 }; 71