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* NXP - pca995x LED driver
The PCA995x family of chips are I2C-bus controlled 16-channel
constant current LED driver optimized for dimming and blinking
57 mA Red/Green/Blue/Amber (RGBA) LEDs.
Note that the top side markings of the pca995x chips are PCA9952
and PCA9955.
Required properties:
- compatible : should be one of :
"nxp,pca9955btw"
"nxp,pca995xtw"
- #address-cells: must be 1
- #size-cells: must be 0
- reg: I2C slave address. depends on the model and HW connections.
Optional properties:
- reset-gpios: use a GPIO to control the reset line of the chip.
LED sub-node properties:
- reg : number of LED line.
from 0 to 15 for the both pca9955btw & pca995xtw
- label : (optional)
see Documentation/devicetree/bindings/leds/common.txt
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
Examples:
/* TechNexion's voice HAT board */
pca995tw: pca995xtw@60 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "nxp,pca995xtw";
reset-gpios = <&gpio5 7 GPIO_ACTIVE_HIGH>;
reg = <0x60>;
led0 {
label = "blue0";
linux,default-trigger = "none";
reg = <0>;
};
led1 {
label = "green0";
linux,default-trigger = "none";
reg = <1>;
};
led2 {
label = "red0";
linux,default-trigger = "none";
reg = <2>;
};
};
/* NXP's 8MIC board */
pca995btw: pca995btw@7 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "nxp,pca995btw";
reg = <0x07>;
led0 {
label = "green0";
linux,default-trigger = "none";
reg = <0>;
};
led1 {
label = "blue0";
linux,default-trigger = "none";
reg = <1>;
};
led2 {
label = "red0";
linux,default-trigger = "none";
reg = <2>;
};
led3 {
label = "green1";
linux,default-trigger = "none";
reg = <3>;
};
};
For more information please check the information bellow:
https://www.nxp.com/docs/en/data-sheet/PCA9952_PCA9955.pdf
https://www.nxp.com/docs/en/data-sheet/PCA9955B.pdf
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