1 TI LMU (Lighting Management Unit) device tree bindings
2
3 TI LMU driver supports lighting devices below.
4
5 Name Child nodes
6 ------ ---------------------------------
7 LM3631 Backlight and regulator
8 LM3632 Backlight and regulator
9 LM3633 Backlight, LED and fault monitor
10 LM3695 Backlight
11 LM36274 Backlight and regulator
12
13 Required properties:
14 - compatible: Should be one of:
15 "ti,lm3631"
16 "ti,lm3632"
17 "ti,lm3633"
18 "ti,lm3695"
19 "ti,lm36274"
20 - reg: I2C slave address.
21 0x11 for LM3632
22 0x29 for LM3631
23 0x36 for LM3633
24 0x63 for LM3695
25 0x11 for LM36274
26
27 Optional properties:
28 - enable-gpios: A GPIO specifier for hardware enable pin.
29 - ramp-up-us: Current ramping from one brightness level to
30 the a higher brightness level.
31 Range from 2048 us - 117.44 s
32 - ramp-down-us: Current ramping from one brightness level to
33 the a lower brightness level.
34 Range from 2048 us - 117.44 s
35 - ti,brightness-resolution - This determines whether to use 8 bit brightness
36 mode or 11 bit brightness mode. If this value is
37 not set the device is defaulted to the preferred
38 8bit brightness mode per 7.3.4.1 of the data
39 sheet. This setting can either be in the parent
40 node or as part of the LED child nodes. This
41 is determined by the part itself if the strings
42 have a common brightness register or individual
43 brightness registers.
44 The values are 255 (8bit) or 2047 (11bit).
45
46 Required node:
47 - backlight: All LMU devices have backlight child nodes.
48 For the properties, please refer to [1].
49
50 Optional nodes:
51 - fault-monitor: Hardware fault monitoring driver for LM3633 and LM3697.
52 Required properties:
53 - compatible: Should be one of:
54 "ti,lm3633-fault-monitor"
55 - leds: LED properties for LM3633. Please refer to [2].
56 LED properties for LM36274. Please refer to [4].
57 - regulators: Regulator properties for LM3631 and LM3632.
58 Please refer to [3].
59
60 [1] ../leds/backlight/ti-lmu-backlight.txt
61 [2] ../leds/leds-lm3633.txt
62 [3] ../regulator/lm363x-regulator.txt
63 [4] ../leds/leds-lm36274.txt
64
65 lm3631@29 {
66 compatible = "ti,lm3631";
67 reg = <0x29>;
68
69 regulators {
70 compatible = "ti,lm363x-regulator";
71
72 vboost {
73 regulator-name = "lcd_boost";
74 regulator-min-microvolt = <4500000>;
75 regulator-max-microvolt = <6350000>;
76 regulator-always-on;
77 };
78
79 vcont {
80 regulator-name = "lcd_vcont";
81 regulator-min-microvolt = <1800000>;
82 regulator-max-microvolt = <3300000>;
83 };
84
85 voref {
86 regulator-name = "lcd_voref";
87 regulator-min-microvolt = <4000000>;
88 regulator-max-microvolt = <6000000>;
89 };
90
91 vpos {
92 regulator-name = "lcd_vpos";
93 regulator-min-microvolt = <4000000>;
94 regulator-max-microvolt = <6000000>;
95 regulator-boot-on;
96 };
97
98 vneg {
99 regulator-name = "lcd_vneg";
100 regulator-min-microvolt = <4000000>;
101 regulator-max-microvolt = <6000000>;
102 regulator-boot-on;
103 };
104 };
105
106 backlight {
107 compatible = "ti,lm3631-backlight";
108
109 lcd_bl {
110 led-sources = <0 1>;
111 ramp-up-us = <300000>;
112 };
113 };
114 };
115
116 lm3632@11 {
117 compatible = "ti,lm3632";
118 reg = <0x11>;
119
120 enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>; /* PC2 */
121
122 regulators {
123 compatible = "ti,lm363x-regulator";
124
125 enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
126 <&pioC 1 GPIO_ACTIVE_HIGH>;
127
128 vboost {
129 regulator-name = "lcd_boost";
130 regulator-min-microvolt = <4500000>;
131 regulator-max-microvolt = <6400000>;
132 regulator-always-on;
133 };
134
135 vpos {
136 regulator-name = "lcd_vpos";
137 regulator-min-microvolt = <4000000>;
138 regulator-max-microvolt = <6000000>;
139 };
140
141 vneg {
142 regulator-name = "lcd_vneg";
143 regulator-min-microvolt = <4000000>;
144 regulator-max-microvolt = <6000000>;
145 };
146 };
147
148 backlight {
149 compatible = "ti,lm3632-backlight";
150
151 pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
152 pwm-names = "lmu-backlight";
153
154 lcd {
155 led-sources = <0 1>;
156 pwm-period = <10000>;
157 };
158 };
159 };
160
161 lm3633@36 {
162 compatible = "ti,lm3633";
163 reg = <0x36>;
164
165 enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
166
167 backlight {
168 compatible = "ti,lm3633-backlight";
169
170 main {
171 label = "main_lcd";
172 led-sources = <1 2>;
173 ramp-up-us = <500000>;
174 ramp-down-us = <500000>;
175 };
176
177 front {
178 label = "front_lcd";
179 led-sources = <0>;
180 ramp-up-us = <1000000>;
181 ramp-down-us = <0>;
182 };
183 };
184
185 leds {
186 compatible = "ti,lm3633-leds";
187
188 chan1 {
189 label = "status";
190 led-sources = <1>;
191 led-max-microamp = <6000>;
192 };
193
194 chan345 {
195 label = "rgb";
196 led-sources = <3 4 5>;
197 led-max-microamp = <10000>;
198 };
199 };
200
201 fault-monitor {
202 compatible = "ti,lm3633-fault-monitor";
203 };
204 };
205
206 lm3695@63 {
207 compatible = "ti,lm3695";
208 reg = <0x63>;
209
210 enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
211
212 backlight {
213 compatible = "ti,lm3695-backlight";
214
215 lcd {
216 label = "bl";
217 led-sources = <0 1>;
218 };
219 };
220 };
221
222 lm36274@11 {
223 compatible = "ti,lm36274";
224 #address-cells = <1>;
225 #size-cells = <0>;
226 reg = <0x11>;
227
228 enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
229 regulators {
230 #address-cells = <1>;
231 #size-cells = <0>;
232 compatible = "ti,lm363x-regulator";
233
234 enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
235 <&pioC 1 GPIO_ACTIVE_HIGH>;
236
237 vboost {
238 regulator-name = "lcd_boost";
239 regulator-min-microvolt = <4000000>;
240 regulator-max-microvolt = <7150000>;
241 regulator-always-on;
242 };
243
244 vpos {
245 regulator-name = "lcd_vpos";
246 regulator-min-microvolt = <4000000>;
247 regulator-max-microvolt = <6500000>;
248 };
249
250 vneg {
251 regulator-name = "lcd_vneg";
252 regulator-min-microvolt = <4000000>;
253 regulator-max-microvolt = <6500000>;
254 };
255 };
256
257 backlight {
258 #address-cells = <1>;
259 #size-cells = <0>;
260 compatible = "ti,lm36274-backlight";
261
262 led@0 {
263 reg = <0>;
264 led-sources = <0 2>;
265 label = "white:backlight_cluster";
266 linux,default-trigger = "backlight";
267 };
268 };
269 };
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