1 * NXP - pca955x LED driver 1 * NXP - pca955x LED driver 2 2 3 The PCA955x family of chips are I2C LED blinke 3 The PCA955x family of chips are I2C LED blinkers whose pins not used 4 to control LEDs can be used as general purpose 4 to control LEDs can be used as general purpose I/Os. The GPIO pins can 5 be input or output, and output pins can also b 5 be input or output, and output pins can also be pulse-width controlled. 6 6 7 Required properties: 7 Required properties: 8 - compatible : should be one of : 8 - compatible : should be one of : 9 "nxp,pca9550" 9 "nxp,pca9550" 10 "nxp,pca9551" 10 "nxp,pca9551" 11 "nxp,pca9552" 11 "nxp,pca9552" 12 "ibm,pca9552" << 13 "nxp,pca9553" 12 "nxp,pca9553" 14 - #address-cells: must be 1 13 - #address-cells: must be 1 15 - #size-cells: must be 0 14 - #size-cells: must be 0 16 - reg: I2C slave address. depends on the model 15 - reg: I2C slave address. depends on the model. 17 16 18 Optional properties: 17 Optional properties: 19 - gpio-controller: allows pins to be used as G 18 - gpio-controller: allows pins to be used as GPIOs. 20 - #gpio-cells: must be 2. 19 - #gpio-cells: must be 2. 21 - gpio-line-names: define the names of the GPI 20 - gpio-line-names: define the names of the GPIO lines 22 21 23 LED sub-node properties: 22 LED sub-node properties: 24 - reg : number of LED line. 23 - reg : number of LED line. 25 from 0 to 1 for the pca9550 24 from 0 to 1 for the pca9550 26 from 0 to 7 for the pca9551 25 from 0 to 7 for the pca9551 27 from 0 to 15 for the pca9552 26 from 0 to 15 for the pca9552 28 from 0 to 3 for the pca9553 27 from 0 to 3 for the pca9553 29 - type: (optional) either 28 - type: (optional) either 30 PCA955X_TYPE_NONE 29 PCA955X_TYPE_NONE 31 PCA955X_TYPE_LED 30 PCA955X_TYPE_LED 32 PCA955X_TYPE_GPIO 31 PCA955X_TYPE_GPIO 33 see dt-bindings/leds/leds-pca955x.h (d 32 see dt-bindings/leds/leds-pca955x.h (default to LED) 34 - label : (optional) 33 - label : (optional) 35 see Documentation/devicetree/bindings/ 34 see Documentation/devicetree/bindings/leds/common.txt 36 - linux,default-trigger : (optional) 35 - linux,default-trigger : (optional) 37 see Documentation/devicetree/bindings/ 36 see Documentation/devicetree/bindings/leds/common.txt 38 37 39 Examples: 38 Examples: 40 39 41 pca9552: pca9552@60 { 40 pca9552: pca9552@60 { 42 compatible = "nxp,pca9552"; 41 compatible = "nxp,pca9552"; 43 #address-cells = <1>; 42 #address-cells = <1>; 44 #size-cells = <0>; 43 #size-cells = <0>; 45 reg = <0x60>; 44 reg = <0x60>; 46 45 47 gpio-controller; 46 gpio-controller; 48 #gpio-cells = <2>; 47 #gpio-cells = <2>; 49 gpio-line-names = "GPIO12", "GPIO13", 48 gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15"; 50 49 51 gpio@12 { 50 gpio@12 { 52 reg = <12>; 51 reg = <12>; 53 type = <PCA955X_TYPE_GPIO>; 52 type = <PCA955X_TYPE_GPIO>; 54 }; 53 }; 55 gpio@13 { 54 gpio@13 { 56 reg = <13>; 55 reg = <13>; 57 type = <PCA955X_TYPE_GPIO>; 56 type = <PCA955X_TYPE_GPIO>; 58 }; 57 }; 59 gpio@14 { 58 gpio@14 { 60 reg = <14>; 59 reg = <14>; 61 type = <PCA955X_TYPE_GPIO>; 60 type = <PCA955X_TYPE_GPIO>; 62 }; 61 }; 63 gpio@15 { 62 gpio@15 { 64 reg = <15>; 63 reg = <15>; 65 type = <PCA955X_TYPE_GPIO>; 64 type = <PCA955X_TYPE_GPIO>; 66 }; 65 }; 67 66 68 led@0 { 67 led@0 { 69 label = "red:power"; 68 label = "red:power"; 70 linux,default-trigger = "defau 69 linux,default-trigger = "default-on"; 71 reg = <0>; 70 reg = <0>; 72 type = <PCA955X_TYPE_LED>; 71 type = <PCA955X_TYPE_LED>; 73 }; 72 }; 74 led@1 { 73 led@1 { 75 label = "green:power"; 74 label = "green:power"; 76 reg = <1>; 75 reg = <1>; 77 type = <PCA955X_TYPE_LED>; 76 type = <PCA955X_TYPE_LED>; 78 }; 77 }; 79 led@2 { 78 led@2 { 80 label = "pca9552:yellow"; 79 label = "pca9552:yellow"; 81 reg = <2>; 80 reg = <2>; 82 type = <PCA955X_TYPE_LED>; 81 type = <PCA955X_TYPE_LED>; 83 }; 82 }; 84 led@3 { 83 led@3 { 85 label = "pca9552:white"; 84 label = "pca9552:white"; 86 reg = <3>; 85 reg = <3>; 87 type = <PCA955X_TYPE_LED>; 86 type = <PCA955X_TYPE_LED>; 88 }; 87 }; 89 }; 88 };
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