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-Device Tree Bindings for Register Bit LEDs
-
-Register bit leds are used with syscon multifunctional devices
-where single bits in a certain register can turn on/off a
-single LED. The register bit LEDs appear as children to the
-syscon device, with the proper compatible string. For the
-syscon bindings see:
-Documentation/devicetree/bindings/mfd/syscon.yaml
-
-Each LED is represented as a sub-node of the syscon device. Each
-node's name represents the name of the corresponding LED.
-
-LED sub-node properties:
-
-Required properties:
-- compatible : must be "register-bit-led"
-- offset : register offset to the register controlling this LED
-- mask : bit mask for the bit controlling this LED in the register
- typically 0x01, 0x02, 0x04 ...
-
-Optional properties:
-- label : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-- linux,default-trigger : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-- default-state: (optional) The initial state of the LED
- see Documentation/devicetree/bindings/leds/common.txt
-
-Example:
-
-syscon: syscon@10000000 {
- compatible = "arm,realview-pb1176-syscon", "syscon";
- reg = <0x10000000 0x1000>;
-
- led@8.0 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x01>;
- label = "versatile:0";
- linux,default-trigger = "heartbeat";
- default-state = "on";
- };
- led@8.1 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x02>;
- label = "versatile:1";
- linux,default-trigger = "mmc0";
- default-state = "off";
- };
- led@8.2 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x04>;
- label = "versatile:2";
- linux,default-trigger = "cpu0";
- default-state = "off";
- };
- led@8.3 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x08>;
- label = "versatile:3";
- default-state = "off";
- };
- led@8.4 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x10>;
- label = "versatile:4";
- default-state = "off";
- };
- led@8.5 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x20>;
- label = "versatile:5";
- default-state = "off";
- };
- led@8.6 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x40>;
- label = "versatile:6";
- default-state = "off";
- };
- led@8.7 {
- compatible = "register-bit-led";
- offset = <0x08>;
- mask = <0x80>;
- label = "versatile:7";
- default-state = "off";
- };
-};