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" 12 "ibm,pca9552"
13 "nxp,pca9553" 13 "nxp,pca9553"
14 - #address-cells: must be 1 14 - #address-cells: must be 1
15 - #size-cells: must be 0 15 - #size-cells: must be 0
16 - reg: I2C slave address. depends on the model 16 - reg: I2C slave address. depends on the model.
17 17
18 Optional properties: 18 Optional properties:
19 - gpio-controller: allows pins to be used as G 19 - gpio-controller: allows pins to be used as GPIOs.
20 - #gpio-cells: must be 2. 20 - #gpio-cells: must be 2.
21 - gpio-line-names: define the names of the GPI 21 - gpio-line-names: define the names of the GPIO lines
22 22
23 LED sub-node properties: 23 LED sub-node properties:
24 - reg : number of LED line. 24 - reg : number of LED line.
25 from 0 to 1 for the pca9550 25 from 0 to 1 for the pca9550
26 from 0 to 7 for the pca9551 26 from 0 to 7 for the pca9551
27 from 0 to 15 for the pca9552 27 from 0 to 15 for the pca9552
28 from 0 to 3 for the pca9553 28 from 0 to 3 for the pca9553
29 - type: (optional) either 29 - type: (optional) either
30 PCA955X_TYPE_NONE 30 PCA955X_TYPE_NONE
31 PCA955X_TYPE_LED 31 PCA955X_TYPE_LED
32 PCA955X_TYPE_GPIO 32 PCA955X_TYPE_GPIO
33 see dt-bindings/leds/leds-pca955x.h (d 33 see dt-bindings/leds/leds-pca955x.h (default to LED)
34 - label : (optional) 34 - label : (optional)
35 see Documentation/devicetree/bindings/ 35 see Documentation/devicetree/bindings/leds/common.txt
36 - linux,default-trigger : (optional) 36 - linux,default-trigger : (optional)
37 see Documentation/devicetree/bindings/ 37 see Documentation/devicetree/bindings/leds/common.txt
38 38
39 Examples: 39 Examples:
40 40
41 pca9552: pca9552@60 { 41 pca9552: pca9552@60 {
42 compatible = "nxp,pca9552"; 42 compatible = "nxp,pca9552";
43 #address-cells = <1>; 43 #address-cells = <1>;
44 #size-cells = <0>; 44 #size-cells = <0>;
45 reg = <0x60>; 45 reg = <0x60>;
46 46
47 gpio-controller; 47 gpio-controller;
48 #gpio-cells = <2>; 48 #gpio-cells = <2>;
49 gpio-line-names = "GPIO12", "GPIO13", 49 gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15";
50 50
51 gpio@12 { 51 gpio@12 {
52 reg = <12>; 52 reg = <12>;
53 type = <PCA955X_TYPE_GPIO>; 53 type = <PCA955X_TYPE_GPIO>;
54 }; 54 };
55 gpio@13 { 55 gpio@13 {
56 reg = <13>; 56 reg = <13>;
57 type = <PCA955X_TYPE_GPIO>; 57 type = <PCA955X_TYPE_GPIO>;
58 }; 58 };
59 gpio@14 { 59 gpio@14 {
60 reg = <14>; 60 reg = <14>;
61 type = <PCA955X_TYPE_GPIO>; 61 type = <PCA955X_TYPE_GPIO>;
62 }; 62 };
63 gpio@15 { 63 gpio@15 {
64 reg = <15>; 64 reg = <15>;
65 type = <PCA955X_TYPE_GPIO>; 65 type = <PCA955X_TYPE_GPIO>;
66 }; 66 };
67 67
68 led@0 { 68 led@0 {
69 label = "red:power"; 69 label = "red:power";
70 linux,default-trigger = "defau 70 linux,default-trigger = "default-on";
71 reg = <0>; 71 reg = <0>;
72 type = <PCA955X_TYPE_LED>; 72 type = <PCA955X_TYPE_LED>;
73 }; 73 };
74 led@1 { 74 led@1 {
75 label = "green:power"; 75 label = "green:power";
76 reg = <1>; 76 reg = <1>;
77 type = <PCA955X_TYPE_LED>; 77 type = <PCA955X_TYPE_LED>;
78 }; 78 };
79 led@2 { 79 led@2 {
80 label = "pca9552:yellow"; 80 label = "pca9552:yellow";
81 reg = <2>; 81 reg = <2>;
82 type = <PCA955X_TYPE_LED>; 82 type = <PCA955X_TYPE_LED>;
83 }; 83 };
84 led@3 { 84 led@3 {
85 label = "pca9552:white"; 85 label = "pca9552:white";
86 reg = <3>; 86 reg = <3>;
87 type = <PCA955X_TYPE_LED>; 87 type = <PCA955X_TYPE_LED>;
88 }; 88 };
89 }; 89 };
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