1*4882a593SmuzhiyunSpecifying wakeup capability for devices 2*4882a593Smuzhiyun============================================ 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunAny device nodes 5*4882a593Smuzhiyun---------------- 6*4882a593SmuzhiyunNodes that describe devices which has wakeup capability must contain an 7*4882a593Smuzhiyun"wakeup-source" boolean property. 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunAlso, if device is marked as a wakeup source, then all the primary 10*4882a593Smuzhiyuninterrupt(s) can be used as wakeup interrupt(s). 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunHowever if the devices have dedicated interrupt as the wakeup source 13*4882a593Smuzhiyunthen they need to specify/identify the same using device specific 14*4882a593Smuzhiyuninterrupt name. In such cases only that interrupt can be used as wakeup 15*4882a593Smuzhiyuninterrupt. 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunList of legacy properties and respective binding document 18*4882a593Smuzhiyun--------------------------------------------------------- 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun1. "enable-sdio-wakeup" Documentation/devicetree/bindings/mmc/mmc.txt 21*4882a593Smuzhiyun2. "gpio-key,wakeup" Documentation/devicetree/bindings/input/gpio-keys{,-polled}.txt 22*4882a593Smuzhiyun3. "has-tpo" Documentation/devicetree/bindings/rtc/rtc-opal.txt 23*4882a593Smuzhiyun4. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt 24*4882a593Smuzhiyun Documentation/devicetree/bindings/mfd/tc3589x.txt 25*4882a593Smuzhiyun Documentation/devicetree/bindings/input/touchscreen/ads7846.txt 26*4882a593Smuzhiyun5. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt 27*4882a593Smuzhiyun6. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt 28*4882a593Smuzhiyun7. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt 29*4882a593Smuzhiyun 30*4882a593SmuzhiyunExamples 31*4882a593Smuzhiyun-------- 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun1. With "wakeup" interrupt name 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun device@10000 { 36*4882a593Smuzhiyun compatible = "vendor,device-id"; 37*4882a593Smuzhiyun reg = <0x10000 0x1000>; 38*4882a593Smuzhiyun interrupts = <0 19 4>, <0 21 4>, <0 22 4>; 39*4882a593Smuzhiyun interrupt-names = "ack", "err", "wakeup"; 40*4882a593Smuzhiyun wakeup-source; 41*4882a593Smuzhiyun }; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun2. Without "wakeup" interrupt name 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun embedded-controller { 46*4882a593Smuzhiyun compatible = "google,cros-ec-i2c"; 47*4882a593Smuzhiyun reg = <0x1e>; 48*4882a593Smuzhiyun interrupts = <6 0>; 49*4882a593Smuzhiyun interrupt-parent = <&gpx1>; 50*4882a593Smuzhiyun pinctrl-names = "default"; 51*4882a593Smuzhiyun pinctrl-0 = <&ec_irq>; 52*4882a593Smuzhiyun wakeup-source; 53*4882a593Smuzhiyun }; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun3. Without interrupts 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun gpio_keys { 58*4882a593Smuzhiyun compatible = "gpio-keys"; 59*4882a593Smuzhiyun #address-cells = <1>; 60*4882a593Smuzhiyun #size-cells = <0>; 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun button@1 { 63*4882a593Smuzhiyun debounce-interval = <50>; 64*4882a593Smuzhiyun wakeup-source; 65*4882a593Smuzhiyun linux,code = <116>; 66*4882a593Smuzhiyun label = "POWER"; 67*4882a593Smuzhiyun gpios = <&iofpga_gpio0 0 0x4>; 68*4882a593Smuzhiyun }; 69*4882a593Smuzhiyun [....] 70*4882a593Smuzhiyun }; 71