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/*
* Device tree overlay for mcp251x/can0 on spi0.0
*/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835";
/* disable spi-dev for spi0.0 */
fragment@0 {
target = <&spi0>;
__overlay__ {
status = "okay";
};
};
fragment@1 {
target = <&spidev0>;
__overlay__ {
status = "disabled";
};
};
/* the interrupt pin of the can-controller */
fragment@2 {
target = <&gpio>;
__overlay__ {
can0_pins: can0_pins {
brcm,pins = <25>;
brcm,function = <0>; /* input */
};
};
};
/* the clock/oscillator of the can-controller */
fragment@3 {
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__overlay__ {
/* external oscillator of mcp2515 on SPI0.0 */
can0_osc: can0_osc {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <16000000>;
};
};
};
/* the spi config of the can-controller itself binding everything together */
fragment@4 {
target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
can0: mcp2515@0 {
reg = <0>;
compatible = "microchip,mcp2515";
pinctrl-names = "default";
pinctrl-0 = <&can0_pins>;
spi-max-frequency = <10000000>;
interrupt-parent = <&gpio>;
interrupts = <25 8>; /* IRQ_TYPE_LEVEL_LOW */
clocks = <&can0_osc>;
};
};
};
__overrides__ {
oscillator = <&can0_osc>,"clock-frequency:0";
spimaxfrequency = <&can0>,"spi-max-frequency:0";
interrupt = <&can0_pins>,"brcm,pins:0",<&can0>,"interrupts:0";
};
};