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|
/*
* Device Tree overlay for Adafruit PiTFT 2.8" resistive touch screen
*
*/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835";
fragment@0 {
target = <&spi0>;
__overlay__ {
status = "okay";
};
};
fragment@1 {
target = <&spidev0>;
__overlay__ {
status = "disabled";
};
};
fragment@2 {
target = <&spidev1>;
__overlay__ {
status = "disabled";
};
};
fragment@3 {
target = <&gpio>;
__overlay__ {
pitft_pins: pitft_pins {
brcm,pins = <24 25>;
brcm,function = <0 1>; /* in out */
brcm,pull = <2 0>; /* pullup none */
};
};
};
fragment@4 {
target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
pitft: pitft@0{
compatible = "ilitek,ili9340";
reg = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pitft_pins>;
spi-max-frequency = <32000000>;
rotate = <90>;
fps = <25>;
bgr;
buswidth = <8>;
dc-gpios = <&gpio 25 0>;
debug = <0>;
};
pitft_ts@1 {
compatible = "st,stmpe610";
reg = <1>;
spi-max-frequency = <500000>;
irq-gpio = <&gpio 24 0x2>; /* IRQF_TRIGGER_FALLING */
interrupts = <24 2>; /* high-to-low edge triggered */
interrupt-parent = <&gpio>;
interrupt-controller;
stmpe_touchscreen {
compatible = "st,stmpe-ts";
st,sample-time = <4>;
st,mod-12b = <1>;
st,ref-sel = <0>;
st,adc-freq = <2>;
st,ave-ctrl = <3>;
st,touch-det-delay = <4>;
st,settling = <2>;
st,fraction-z = <7>;
st,i-drive = <0>;
};
stmpe_gpio: stmpe_gpio {
#gpio-cells = <2>;
compatible = "st,stmpe-gpio";
/*
* only GPIO2 is wired/available
* and it is wired to the backlight
*/
st,norequest-mask = <0x7b>;
};
};
};
};
fragment@5 {
target-path = "/soc";
__overlay__ {
backlight {
compatible = "gpio-backlight";
gpios = <&stmpe_gpio 2 0>;
default-on;
};
};
};
__overrides__ {
speed = <&pitft>,"spi-max-frequency:0";
rotate = <&pitft>,"rotate:0";
fps = <&pitft>,"fps:0";
debug = <&pitft>,"debug:0";
};
};
|
