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1* NXP - pca955x LED driver2 3The PCA955x family of chips are I2C LED blinkers whose pins not used4to control LEDs can be used as general purpose I/Os. The GPIO pins can5be input or output, and output pins can also be pulse-width controlled.6 7Required properties:8- compatible : should be one of :9 "nxp,pca9550"10 "nxp,pca9551"11 "nxp,pca9552"12 "ibm,pca9552"13 "nxp,pca9553"14- #address-cells: must be 115- #size-cells: must be 016- reg: I2C slave address. depends on the model.17 18Optional properties:19- gpio-controller: allows pins to be used as GPIOs.20- #gpio-cells: must be 2.21- gpio-line-names: define the names of the GPIO lines22 23LED sub-node properties:24- reg : number of LED line.25 from 0 to 1 for the pca955026 from 0 to 7 for the pca955127 from 0 to 15 for the pca955228 from 0 to 3 for the pca955329- type: (optional) either30 PCA955X_TYPE_NONE31 PCA955X_TYPE_LED32 PCA955X_TYPE_GPIO33 see dt-bindings/leds/leds-pca955x.h (default to LED)34- label : (optional)35 see Documentation/devicetree/bindings/leds/common.txt36- linux,default-trigger : (optional)37 see Documentation/devicetree/bindings/leds/common.txt38 39Examples:40 41pca9552: pca9552@60 {42 compatible = "nxp,pca9552";43 #address-cells = <1>;44 #size-cells = <0>;45 reg = <0x60>;46 47 gpio-controller;48 #gpio-cells = <2>;49 gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15";50 51 gpio@12 {52 reg = <12>;53 type = <PCA955X_TYPE_GPIO>;54 };55 gpio@13 {56 reg = <13>;57 type = <PCA955X_TYPE_GPIO>;58 };59 gpio@14 {60 reg = <14>;61 type = <PCA955X_TYPE_GPIO>;62 };63 gpio@15 {64 reg = <15>;65 type = <PCA955X_TYPE_GPIO>;66 };67 68 led@0 {69 label = "red:power";70 linux,default-trigger = "default-on";71 reg = <0>;72 type = <PCA955X_TYPE_LED>;73 };74 led@1 {75 label = "green:power";76 reg = <1>;77 type = <PCA955X_TYPE_LED>;78 };79 led@2 {80 label = "pca9552:yellow";81 reg = <2>;82 type = <PCA955X_TYPE_LED>;83 };84 led@3 {85 label = "pca9552:white";86 reg = <3>;87 type = <PCA955X_TYPE_LED>;88 };89};90