52 lines
1.1 KiB
Nix
52 lines
1.1 KiB
Nix
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{ config, lib, pkgs, ... }:
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with pkgs;
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{
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# A bunch of boot parameters needed for optimal runtime on RPi 4B
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boot.kernelPackages = linuxPackages_rpi4;
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boot.kernelParams = [
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"zfs.zfs_arc_max=134217728"
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"console=TTYAMA0,115200"
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"console=tty1"
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"8250.nr_uarts=1"
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"iomem=relaxed"
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"strict-devmem=0"
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];
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# Enable SATA-HAT GPIO features
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boot.loader.grub.enable = false;
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boot.loader.raspberryPi = {
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enable = true;
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version = 4;
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firmwareConfig = ''
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iomem=relaxed
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strict-devmem=0
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dtoverlay=pwm-2chan,pin=12,func=4,pin2=13,func2=4
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dtoverlay=w1-gpio
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dtparam=i2c1=on
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'';
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};
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# Load PWM hardware timers
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boot.kernelModules = [ "pwm_bcm2835" "w1-gpio" "w1-therm" ];
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hardware.deviceTree = {
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enable = true;
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filter = "*-rpi-*.dtb";
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overlays = [
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{
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name = "pwm-2chan";
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dtboFile = "${device-tree_rpi.overlays}/pwm-2chan.dtbo";
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}
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{
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name = "w1-gpio";
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dtboFile = "${device-tree_rpi.overlays}/w1-gpio.dtbo";
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}
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];
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};
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# Enable I2C
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hardware.i2c.enable = true;
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}
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