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* NXP - pca955x LED driver
The PCA955x family of chips are I2C LED blinkers whose pins not used
to control LEDs can be used as general purpose I/Os. The GPIO pins can
be input or output, and output pins can also be pulse-width controlled.
Required properties:
- compatible : should be one of :
"nxp,pca9550"
"nxp,pca9551"
"nxp,pca9552"
"nxp,pca9553"
- #address-cells: must be 1
- #size-cells: must be 0
- reg: I2C slave address. depends on the model.
Optional properties:
- gpio-controller: allows pins to be used as GPIOs.
- #gpio-cells: must be 2.
- gpio-line-names: define the names of the GPIO lines
LED sub-node properties:
- reg : number of LED line.
from 0 to 1 for the pca9550
from 0 to 7 for the pca9551
from 0 to 15 for the pca9552
from 0 to 3 for the pca9553
- type: (optional) either
PCA955X_TYPE_NONE
PCA955X_TYPE_LED
PCA955X_TYPE_GPIO
see dt-bindings/leds/leds-pca955x.h (default to LED)
- label : (optional)
see Documentation/devicetree/bindings/leds/common.txt
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
Examples:
pca9552: pca9552@60 {
compatible = "nxp,pca9552";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x60>;
gpio-controller;
#gpio-cells = <2>;
gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15";
gpio@12 {
reg = <12>;
type = <PCA955X_TYPE_GPIO>;
};
gpio@13 {
reg = <13>;
type = <PCA955X_TYPE_GPIO>;
};
gpio@14 {
reg = <14>;
type = <PCA955X_TYPE_GPIO>;
};
gpio@15 {
reg = <15>;
type = <PCA955X_TYPE_GPIO>;
};
led@0 {
label = "red:power";
linux,default-trigger = "default-on";
reg = <0>;
type = <PCA955X_TYPE_LED>;
};
led@1 {
label = "green:power";
reg = <1>;
type = <PCA955X_TYPE_LED>;
};
led@2 {
label = "pca9552:yellow";
reg = <2>;
type = <PCA955X_TYPE_LED>;
};
led@3 {
label = "pca9552:white";
reg = <3>;
type = <PCA955X_TYPE_LED>;
};
};
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