xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/pwm/nxp,pca9685-pwm.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593SmuzhiyunNXP PCA9685 16-channel 12-bit PWM LED controller
2*4882a593Smuzhiyun================================================
3*4882a593Smuzhiyun
4*4882a593SmuzhiyunRequired properties:
5*4882a593Smuzhiyun  - compatible: "nxp,pca9685-pwm"
6*4882a593Smuzhiyun  - #pwm-cells: Should be 2. See pwm.yaml in this directory for a description of
7*4882a593Smuzhiyun    the cells format.
8*4882a593Smuzhiyun    The index 16 is the ALLCALL channel, that sets all PWM channels at the same
9*4882a593Smuzhiyun    time.
10*4882a593Smuzhiyun
11*4882a593SmuzhiyunOptional properties:
12*4882a593Smuzhiyun  - invert (bool): boolean to enable inverted logic
13*4882a593Smuzhiyun  - open-drain (bool): boolean to configure outputs with open-drain structure;
14*4882a593Smuzhiyun		       if omitted use totem-pole structure
15*4882a593Smuzhiyun
16*4882a593SmuzhiyunExample:
17*4882a593Smuzhiyun
18*4882a593SmuzhiyunFor LEDs that are directly connected to the PCA, the following setting is
19*4882a593Smuzhiyunapplicable:
20*4882a593Smuzhiyun
21*4882a593Smuzhiyunpca: pca@41 {
22*4882a593Smuzhiyun	compatible = "nxp,pca9685-pwm";
23*4882a593Smuzhiyun	#pwm-cells = <2>;
24*4882a593Smuzhiyun	reg = <0x41>;
25*4882a593Smuzhiyun	invert;
26*4882a593Smuzhiyun	open-drain;
27*4882a593Smuzhiyun};
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