forked from Qortal/Brooklyn
50 lines
1.1 KiB
Plaintext
50 lines
1.1 KiB
Plaintext
/dts-v1/;
|
|
/plugin/;
|
|
|
|
/*
|
|
This is the 2-channel overlay - only use it if you need both channels.
|
|
|
|
Legal pin,function combinations for each channel:
|
|
PWM0: 12,4(Alt0) 18,2(Alt5) 40,4(Alt0) 52,5(Alt1)
|
|
PWM1: 13,4(Alt0) 19,2(Alt5) 41,4(Alt0) 45,4(Alt0) 53,5(Alt1)
|
|
|
|
N.B.:
|
|
1) Pin 18 is the only one available on all platforms, and
|
|
it is the one used by the I2S audio interface.
|
|
Pins 12 and 13 might be better choices on an A+, B+ or Pi2.
|
|
2) The onboard analogue audio output uses both PWM channels.
|
|
3) So be careful mixing audio and PWM.
|
|
*/
|
|
|
|
/ {
|
|
compatible = "brcm,bcm2835";
|
|
|
|
fragment@0 {
|
|
target = <&gpio>;
|
|
__overlay__ {
|
|
pwm_pins: pwm_pins {
|
|
brcm,pins = <18 19>;
|
|
brcm,function = <2 2>; /* Alt5 */
|
|
};
|
|
};
|
|
};
|
|
|
|
fragment@1 {
|
|
target = <&pwm>;
|
|
frag1: __overlay__ {
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pwm_pins>;
|
|
assigned-clock-rates = <100000000>;
|
|
status = "okay";
|
|
};
|
|
};
|
|
|
|
__overrides__ {
|
|
pin = <&pwm_pins>,"brcm,pins:0";
|
|
pin2 = <&pwm_pins>,"brcm,pins:4";
|
|
func = <&pwm_pins>,"brcm,function:0";
|
|
func2 = <&pwm_pins>,"brcm,function:4";
|
|
clock = <&frag1>,"assigned-clock-rates:0";
|
|
};
|
|
};
|