Commit | Line | Data |
---|---|---|
25a7a6f4 MK |
1 | TI/National Semiconductor LP3943 PWM controller |
2 | ||
3 | Required properties: | |
4 | - compatible: "ti,lp3943-pwm" | |
5 | - #pwm-cells: Should be 2. See pwm.txt in this directory for a | |
6 | description of the cells format. | |
7 | Note that this hardware limits the period length to the | |
8 | range 6250~1600000. | |
9 | - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1. | |
10 | 0 = output 0 | |
11 | 1 = output 1 | |
12 | . | |
13 | . | |
14 | 15 = output 15 | |
15 | ||
16 | Example: | |
17 | PWM 0 is for RGB LED brightness control | |
18 | PWM 1 is for brightness control of LP8557 backlight device | |
19 | ||
20 | &i2c3 { | |
21 | lp3943@60 { | |
22 | compatible = "ti,lp3943"; | |
23 | reg = <0x60>; | |
24 | ||
25 | /* | |
26 | * PWM 0 : output 8, 9 and 10 | |
27 | * PWM 1 : output 15 | |
28 | */ | |
29 | pwm3943: pwm { | |
30 | compatible = "ti,lp3943-pwm"; | |
31 | #pwm-cells = <2>; | |
32 | ti,pwm0 = <8 9 10>; | |
33 | ti,pwm1 = <15>; | |
34 | }; | |
35 | }; | |
36 | ||
37 | }; | |
38 | ||
39 | /* LEDs control with PWM 0 of LP3943 */ | |
40 | pwmleds { | |
41 | compatible = "pwm-leds"; | |
42 | rgb { | |
43 | label = "indi::rgb"; | |
44 | pwms = <&pwm3943 0 10000>; | |
45 | max-brightness = <255>; | |
46 | }; | |
47 | }; | |
48 | ||
49 | &i2c4 { | |
50 | /* Backlight control with PWM 1 of LP3943 */ | |
51 | backlight@2c { | |
52 | compatible = "ti,lp8557"; | |
53 | reg = <0x2c>; | |
54 | ||
55 | pwms = <&pwm3943 1 10000>; | |
56 | pwm-names = "lp8557"; | |
57 | }; | |
58 | }; |