1 NXP PCA9685 16-channel 12-bit PWM LED controll 1 NXP PCA9685 16-channel 12-bit PWM LED controller
2 ============================================== 2 ================================================
3 3
4 Required properties: 4 Required properties:
5 - compatible: "nxp,pca9685-pwm" 5 - compatible: "nxp,pca9685-pwm"
6 - #pwm-cells: Should be 2. See pwm.yaml in t 6 - #pwm-cells: Should be 2. See pwm.yaml in this directory for a description of
7 the cells format. 7 the cells format.
8 The index 16 is the ALLCALL channel, that 8 The index 16 is the ALLCALL channel, that sets all PWM channels at the same
9 time. 9 time.
10 10
11 Optional properties: 11 Optional properties:
12 - invert (bool): boolean to enable inverted 12 - invert (bool): boolean to enable inverted logic
13 - open-drain (bool): boolean to configure ou 13 - open-drain (bool): boolean to configure outputs with open-drain structure;
14 if omitted use totem-po 14 if omitted use totem-pole structure
15 15
16 Example: 16 Example:
17 17
18 For LEDs that are directly connected to the PC 18 For LEDs that are directly connected to the PCA, the following setting is
19 applicable: 19 applicable:
20 20
21 pca: pca@41 { 21 pca: pca@41 {
22 compatible = "nxp,pca9685-pwm"; 22 compatible = "nxp,pca9685-pwm";
23 #pwm-cells = <2>; 23 #pwm-cells = <2>;
24 reg = <0x41>; 24 reg = <0x41>;
25 invert; 25 invert;
26 open-drain; 26 open-drain;
27 }; 27 };
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