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Documentation / devicetree / bindings / leds / leds-lp55xx.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	Binding for TI/National Semiconductor LP55xx Led Drivers
2	
3	Required properties:
4	- compatible: one of
5		national,lp5521
6		national,lp5523
7		ti,lp55231
8		ti,lp5562
9		ti,lp8501
10	
11	- reg: I2C slave address
12	- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external)
13	
14	Each child has own specific current settings
15	- led-cur: Current setting at each led channel (mA x10, 0 if led is not connected)
16	- max-cur: Maximun current at each led channel.
17	
18	Optional properties:
19	- enable-gpio: GPIO attached to the chip's enable pin
20	- label: Used for naming LEDs
21	- pwr-sel: LP8501 specific property. Power selection for output channels.
22	         0: D1~9 are connected to VDD
23	         1: D1~6 with VDD, D7~9 with VOUT
24	         2: D1~6 with VOUT, D7~9 with VDD
25	         3: D1~9 are connected to VOUT
26	
27	Alternatively, each child can have a specific channel name and trigger:
28	- chan-name (optional): name of channel
29	- linux,default-trigger (optional): see
30	  Documentation/devicetree/bindings/leds/common.txt
31	
32	example 1) LP5521
33	3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
34	'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger
35	on channel 0.
36	
37	lp5521@32 {
38		compatible = "national,lp5521";
39		reg = <0x32>;
40		label = "lp5521_pri";
41		clock-mode = /bits/ 8 <2>;
42	
43		chan0 {
44			led-cur = /bits/ 8 <0x2f>;
45			max-cur = /bits/ 8 <0x5f>;
46			linux,default-trigger = "heartbeat";
47		};
48	
49		chan1 {
50			led-cur = /bits/ 8 <0x2f>;
51			max-cur = /bits/ 8 <0x5f>;
52		};
53	
54		chan2 {
55			led-cur = /bits/ 8 <0x2f>;
56			max-cur = /bits/ 8 <0x5f>;
57		};
58	};
59	
60	example 2) LP5523
61	9 LED channels with specific name. Internal clock used.
62	The I2C slave address is configurable with ASEL1 and ASEL0 pins.
63	Available addresses are 32/33/34/35h.
64	
65	ASEL1    ASEL0    Address
66	-------------------------
67	 GND      GND       32h
68	 GND      VEN       33h
69	 VEN      GND       34h
70	 VEN      VEN       35h
71	
72	lp5523@32 {
73		compatible = "national,lp5523";
74		reg = <0x32>;
75		clock-mode = /bits/ 8 <1>;
76	
77		chan0 {
78			chan-name = "d1";
79			led-cur = /bits/ 8 <0x14>;
80			max-cur = /bits/ 8 <0x20>;
81		};
82	
83		chan1 {
84			chan-name = "d2";
85			led-cur = /bits/ 8 <0x14>;
86			max-cur = /bits/ 8 <0x20>;
87		};
88	
89		chan2 {
90			chan-name = "d3";
91			led-cur = /bits/ 8 <0x14>;
92			max-cur = /bits/ 8 <0x20>;
93		};
94	
95		chan3 {
96			chan-name = "d4";
97			led-cur = /bits/ 8 <0x14>;
98			max-cur = /bits/ 8 <0x20>;
99		};
100	
101		chan4 {
102			chan-name = "d5";
103			led-cur = /bits/ 8 <0x14>;
104			max-cur = /bits/ 8 <0x20>;
105		};
106	
107		chan5 {
108			chan-name = "d6";
109			led-cur = /bits/ 8 <0x14>;
110			max-cur = /bits/ 8 <0x20>;
111		};
112	
113		chan6 {
114			chan-name = "d7";
115			led-cur = /bits/ 8 <0x14>;
116			max-cur = /bits/ 8 <0x20>;
117		};
118	
119		chan7 {
120			chan-name = "d8";
121			led-cur = /bits/ 8 <0x14>;
122			max-cur = /bits/ 8 <0x20>;
123		};
124	
125		chan8 {
126			chan-name = "d9";
127			led-cur = /bits/ 8 <0x14>;
128			max-cur = /bits/ 8 <0x20>;
129		};
130	};
131	
132	example 3) LP5562
133	4 channels are defined.
134	
135	lp5562@30 {
136		compatible = "ti,lp5562";
137		reg = <0x30>;
138		clock-mode = /bits/8 <2>;
139	
140		chan0 {
141			chan-name = "R";
142			led-cur = /bits/ 8 <0x20>;
143			max-cur = /bits/ 8 <0x60>;
144		};
145	
146		chan1 {
147			chan-name = "G";
148			led-cur = /bits/ 8 <0x20>;
149			max-cur = /bits/ 8 <0x60>;
150		};
151	
152		chan2 {
153			chan-name = "B";
154			led-cur = /bits/ 8 <0x20>;
155			max-cur = /bits/ 8 <0x60>;
156		};
157	
158		chan3 {
159			chan-name = "W";
160			led-cur = /bits/ 8 <0x20>;
161			max-cur = /bits/ 8 <0x60>;
162		};
163	};
164	
165	example 4) LP8501
166	9 channels are defined. The 'pwr-sel' is LP8501 specific property.
167	Others are same as LP5523.
168	
169	lp8501@32 {
170		compatible = "ti,lp8501";
171		reg = <0x32>;
172		clock-mode = /bits/ 8 <2>;
173		pwr-sel = /bits/ 8 <3>;	/* D1~9 connected to VOUT */
174	
175		chan0 {
176			chan-name = "d1";
177			led-cur = /bits/ 8 <0x14>;
178			max-cur = /bits/ 8 <0x20>;
179		};
180	
181		chan1 {
182			chan-name = "d2";
183			led-cur = /bits/ 8 <0x14>;
184			max-cur = /bits/ 8 <0x20>;
185		};
186	
187		chan2 {
188			chan-name = "d3";
189			led-cur = /bits/ 8 <0x14>;
190			max-cur = /bits/ 8 <0x20>;
191		};
192	
193		chan3 {
194			chan-name = "d4";
195			led-cur = /bits/ 8 <0x14>;
196			max-cur = /bits/ 8 <0x20>;
197		};
198	
199		chan4 {
200			chan-name = "d5";
201			led-cur = /bits/ 8 <0x14>;
202			max-cur = /bits/ 8 <0x20>;
203		};
204	
205		chan5 {
206			chan-name = "d6";
207			led-cur = /bits/ 8 <0x14>;
208			max-cur = /bits/ 8 <0x20>;
209		};
210	
211		chan6 {
212			chan-name = "d7";
213			led-cur = /bits/ 8 <0x14>;
214			max-cur = /bits/ 8 <0x20>;
215		};
216	
217		chan7 {
218			chan-name = "d8";
219			led-cur = /bits/ 8 <0x14>;
220			max-cur = /bits/ 8 <0x20>;
221		};
222	
223		chan8 {
224			chan-name = "d9";
225			led-cur = /bits/ 8 <0x14>;
226			max-cur = /bits/ 8 <0x20>;
227		};
228	};
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