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raspberry-pi/4: Add poe-hat option

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James Walker 2021-06-02 20:47:23 -04:00
parent b2186d6c3c
commit cf3508aab6
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2 changed files with 123 additions and 0 deletions
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1
raspberry-pi/4/default.nix
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@ -4,6 +4,7 @@
imports = [
./dwc2.nix
./modesetting.nix
./poe-hat.nix
./tc358743.nix
];

122
raspberry-pi/4/poe-hat.nix Normal file
View file

@ -0,0 +1,122 @@
{ config, lib, pkgs, ... }:
let
cfg = config.hardware.raspberry-pi."4".poe-hat;
in {
options.hardware = {
raspberry-pi."4".poe-hat = {
enable = lib.mkEnableOption ''
Enable support for the Raspberry Pi POE Hat.
'';
};
};
config = lib.mkIf cfg.enable {
# Configure for modesetting in the device tree
hardware.deviceTree = {
overlays = [
# Equivalent to: https://github.com/raspberrypi/linux/blob/rpi-5.10.y/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
{
name = "rpi-poe-overlay";
dtsText = ''
/*
* Overlay for the Raspberry Pi POE HAT.
*/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2711";
fragment@0 {
target-path = "/";
__overlay__ {
fan0: rpi-poe-fan@0 {
compatible = "raspberrypi,rpi-poe-fan";
firmware = <&firmware>;
cooling-min-state = <0>;
cooling-max-state = <4>;
#cooling-cells = <2>;
cooling-levels = <0 1 10 100 255>;
status = "okay";
};
};
};
fragment@1 {
target = <&cpu_thermal>;
__overlay__ {
trips {
trip0: trip0 {
temperature = <40000>;
hysteresis = <2000>;
type = "active";
};
trip1: trip1 {
temperature = <45000>;
hysteresis = <2000>;
type = "active";
};
trip2: trip2 {
temperature = <50000>;
hysteresis = <2000>;
type = "active";
};
trip3: trip3 {
temperature = <55000>;
hysteresis = <5000>;
type = "active";
};
};
cooling-maps {
map0 {
trip = <&trip0>;
cooling-device = <&fan0 0 1>;
};
map1 {
trip = <&trip1>;
cooling-device = <&fan0 1 2>;
};
map2 {
trip = <&trip2>;
cooling-device = <&fan0 2 3>;
};
map3 {
trip = <&trip3>;
cooling-device = <&fan0 3 4>;
};
};
};
};
fragment@2 {
target-path = "/__overrides__";
__overlay__ {
poe_fan_temp0 = <&trip0>,"temperature:0";
poe_fan_temp0_hyst = <&trip0>,"hysteresis:0";
poe_fan_temp1 = <&trip1>,"temperature:0";
poe_fan_temp1_hyst = <&trip1>,"hysteresis:0";
poe_fan_temp2 = <&trip2>,"temperature:0";
poe_fan_temp2_hyst = <&trip2>,"hysteresis:0";
poe_fan_temp3 = <&trip3>,"temperature:0";
poe_fan_temp3_hyst = <&trip3>,"hysteresis:0";
};
};
__overrides__ {
poe_fan_temp0 = <&trip0>,"temperature:0";
poe_fan_temp0_hyst = <&trip0>,"hysteresis:0";
poe_fan_temp1 = <&trip1>,"temperature:0";
poe_fan_temp1_hyst = <&trip1>,"hysteresis:0";
poe_fan_temp2 = <&trip2>,"temperature:0";
poe_fan_temp2_hyst = <&trip2>,"hysteresis:0";
poe_fan_temp3 = <&trip3>,"temperature:0";
poe_fan_temp3_hyst = <&trip3>,"hysteresis:0";
};
};
'';
}
];
};
};
}