From a68eee4c748c006daae6b06c9c5bb85be77724f6 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Wed, 21 Oct 2015 11:09:58 +0100 Subject: [PATCH] Documentation: devicetree: standardize/consolidate on "wakeup-source" property Currently different drivers use multiple forms of annotating devices that should be set up as wakeup sources for the system. This patch adds a separate binding document inorder to standardize and consolidate to use "wakeup-source" boolean property to mark the devices as wakeup capable. Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Ian Campbell Signed-off-by: Sudeep Holla Signed-off-by: Rob Herring --- .../bindings/power/wakeup-source.txt | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/wakeup-source.txt diff --git a/Documentation/devicetree/bindings/power/wakeup-source.txt b/Documentation/devicetree/bindings/power/wakeup-source.txt new file mode 100644 index 000000000000..963c6dfd484d --- /dev/null +++ b/Documentation/devicetree/bindings/power/wakeup-source.txt @@ -0,0 +1,71 @@ +Specifying wakeup capability for devices +============================================ + +Any device nodes +---------------- +Nodes that describe devices which has wakeup capability must contain an +"wakeup-source" boolean property. + +Also, if device is marked as a wakeup source, then all the primary +interrupt(s) can be used as wakeup interrupt(s). + +However if the devices have dedicated interrupt as the wakeup source +then they need to specify/identify the same using device specific +interrupt name. In such cases only that interrupt can be used as wakeup +interrupt. + +List of legacy properties and respective binding document +--------------------------------------------------------- + +1. "enable-sdio-wakeup" Documentation/devicetree/bindings/mmc/mmc.txt +2. "gpio-key,wakeup" Documentation/devicetree/bindings/input/gpio-keys{,-polled}.txt +3. "has-tpo" Documentation/devicetree/bindings/rtc/rtc-opal.txt +4. "isil,irq2-can-wakeup-machine" Documentation/devicetree/bindings/rtc/isil,isl12057.txt +5. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt + Documentation/devicetree/bindings/mfd/tc3589x.txt + Documentation/devicetree/bindings/input/ads7846.txt +6. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt +7. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt +8. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt + +Examples +-------- + +1. With "wakeup" interrupt name + + device@10000 { + compatible = "vendor,device-id"; + reg = <0x10000 0x1000>; + interrupts = <0 19 4>, <0 21 4>, <0 22 4>; + interrupt-names = "ack", "err", "wakeup"; + wakeup-source; + }; + +2. Without "wakeup" interrupt name + + embedded-controller { + compatible = "google,cros-ec-i2c"; + reg = <0x1e>; + interrupts = <6 0>; + interrupt-parent = <&gpx1>; + pinctrl-names = "default"; + pinctrl-0 = <&ec_irq>; + wakeup-source; + }; + +3. Without interrupts + + gpio_keys { + compatible = "gpio-keys"; + #address-cells = <1>; + #size-cells = <0>; + + button@1 { + debounce_interval = <50>; + wakeup-source; + linux,code = <116>; + label = "POWER"; + gpios = <&iofpga_gpio0 0 0x4>; + }; + [....] + }; -- 2.20.1