xref: /linux/Documentation/devicetree/bindings/leds/leds-pca955x.txt (revision 8e07e0e3964ca4e23ce7b68e2096fe660a888942) 
1* NXP - pca955x LED driver
2
3The PCA955x family of chips are I2C LED blinkers whose pins not used
4to control LEDs can be used as general purpose I/Os. The GPIO pins can
5be 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 1
15- #size-cells: must be 0
16- 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 lines
22
23LED sub-node properties:
24- reg : number of LED line.
25		from 0 to  1 for the pca9550
26		from 0 to  7 for the pca9551
27		from 0 to 15 for the pca9552
28		from 0 to  3 for the pca9553
29- type: (optional) either
30	PCA955X_TYPE_NONE
31	PCA955X_TYPE_LED
32	PCA955X_TYPE_GPIO
33	see dt-bindings/leds/leds-pca955x.h (default to LED)
34- label : (optional)
35	see Documentation/devicetree/bindings/leds/common.txt
36- linux,default-trigger : (optional)
37	see Documentation/devicetree/bindings/leds/common.txt
38
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