26 lines
668 B
Nix
26 lines
668 B
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
let
|
|
cfg = config.hardware.raspberry-pi."4".i2c1;
|
|
inherit (import ./overlay.nix) simple-pi4-overlay;
|
|
in
|
|
{
|
|
options.hardware = {
|
|
raspberry-pi."4".i2c1 = {
|
|
enable = lib.mkEnableOption ''
|
|
Turn on the ARM I2C bus (/dev/i2c-1 on GPIO pins 3 and 5) and enable access from the i2c group.
|
|
After a reboot, i2c-tools (e.g. i2cdetect -F 1) should work for root or any user in i2c.
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = lib.mkIf cfg.enable {
|
|
hardware = {
|
|
i2c.enable = lib.mkDefault true;
|
|
deviceTree = {
|
|
overlays = [ (simple-pi4-overlay { target = "i2c1"; status = "okay"; }) ];
|
|
};
|
|
};
|
|
};
|
|
}
|