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




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:01 EST.

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