phundrak
ba018ef841
Configuration is now held by the `.org` files. All `.nix` files are tangled from the org-mode files.
49 lines
1.3 KiB
Org Mode
49 lines
1.3 KiB
Org Mode
#+title: PineTab2
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#+setupfile: ../headers
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* PineTab2
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A few tweaks are specific to my PineTab2 tablet: getting a serial
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console working at boot, exposing its sensors, and making it easy to
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find on whatever network it’s connected to. Here’s the skeleton of the
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=nixos.pinetab2= module.
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#+begin_src nix :tangle yes
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{
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flake.modules.nixos.pinetab2 = {
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<<kernel-params>>
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<<sensors>>
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<<avahi>>
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};
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}
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#+end_src
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** Serial Console
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These kernel parameters get me a working serial console on the
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tablet’s UART at boot, and point the kernel at the SD card’s root
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filesystem by label rather than by a device path that can shift
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around.
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#+name: kernel-params
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#+begin_src nix
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boot.kernelParams = ["console=tty0" "console=ttyS2,1500000n8" "rootwait" "root=LABEL=NIXOS_SD" "rw"];
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#+end_src
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** Sensors
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Turning on the IIO (Industrial I/O) subsystem exposes the tablet’s
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accelerometer and ambient light sensor, which is what lets things like
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auto-rotate work.
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#+name: sensors
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#+begin_src nix
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hardware.sensor.iio.enable = true;
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#+end_src
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** Finding It on the Network
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The tablet moves between networks a lot, so Avahi lets me reach it by
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its =.local= hostname over mDNS instead of having to look up whatever IP
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it was handed.
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#+name: avahi
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#+begin_src nix
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services.avahi = {
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enable = true;
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openFirewall = true;
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};
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#+end_src
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