forked from Minki/linux
59 lines
1.1 KiB
Plaintext
59 lines
1.1 KiB
Plaintext
|
TI/National Semiconductor LP3943 PWM controller
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: "ti,lp3943-pwm"
|
||
|
|
- #pwm-cells: Should be 2. See pwm.txt in this directory for a
|
||
|
|
description of the cells format.
|
||
|
|
Note that this hardware limits the period length to the
|
||
|
|
range 6250~1600000.
|
||
|
|
- ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1.
|
||
|
|
0 = output 0
|
||
|
|
1 = output 1
|
||
|
|
.
|
||
|
|
.
|
||
|
|
15 = output 15
|
||
|
|
|
||
|
|
Example:
|
||
|
|
PWM 0 is for RGB LED brightness control
|
||
|
|
PWM 1 is for brightness control of LP8557 backlight device
|
||
|
|
|
||
|
|
&i2c3 {
|
||
|
|
lp3943@60 {
|
||
|
|
compatible = "ti,lp3943";
|
||
|
|
reg = <0x60>;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PWM 0 : output 8, 9 and 10
|
||
|
|
* PWM 1 : output 15
|
||
|
|
*/
|
||
|
|
pwm3943: pwm {
|
||
|
|
compatible = "ti,lp3943-pwm";
|
||
|
|
#pwm-cells = <2>;
|
||
|
|
ti,pwm0 = <8 9 10>;
|
||
|
|
ti,pwm1 = <15>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
/* LEDs control with PWM 0 of LP3943 */
|
||
|
|
pwmleds {
|
||
|
|
compatible = "pwm-leds";
|
||
|
|
rgb {
|
||
|
|
label = "indi::rgb";
|
||
|
|
pwms = <&pwm3943 0 10000>;
|
||
|
|
max-brightness = <255>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
&i2c4 {
|
||
|
|
/* Backlight control with PWM 1 of LP3943 */
|
||
|
|
backlight@2c {
|
||
|
|
compatible = "ti,lp8557";
|
||
|
|
reg = <0x2c>;
|
||
|
|
|
||
|
|
pwms = <&pwm3943 1 10000>;
|
||
|
|
pwm-names = "lp8557";
|
||
|
|
};
|
||
|
|
};
|