Setting up lirc and evdev on Le Potato

Make sure that the kernel module is loaded meson_ir (Its in their kernel by default and if you use their config for a custom kernel)

Install Dependencies

emerge --ask media-tv/v4l-utils app-misc/lirc dev-python/python-evdev app-misc/evtest

Modprobe kernel modules

modprobe -a ir-nec-decoder ir-rc5-decoder ir-rc6-decoder ir-jvc-decoder ir-sony-decoder ir-rc5-sz-decoder ir-sanyo-decoder ir-mce_kbd-decoder ir-lirc-codec

Get keycodes for each button on your remote

ir-keytable -c -p NEC,RC-5,RC-6,JVC,SONY -t

press buttons and make a list of buttons, keycodes and protocol from output similar to below
```
lirc protocol(nec): scancode = 0x40
```

using the information you gathered created make remote definition https://github.com/torvalds/linux/blob/master/include/uapi/linux/input-event-codes.h:Valid Keycodes

austin@mobilemouse ~/mocp_i2c_lcd_ir_remote $ cat /lib/udev/rc_keymaps/my_remote.toml
[[protocols]]
name = "My_Remote"
protocol = "nec"
variant = "nec32"

[protocols.scancodes]
0x45 = "KEY_POWER"
0x46 = "KEY_MODE"
0x47 = "KEY_MUTE"

0x44 = "KEY_PLAYPAUSE"
0x40 = "KEY_BACK"
0x43 = "KEY_FORWARD"

0x07 = ""
0x15 = "KEY_VOLUMEDOWN"
0x09 = "KEY_VOLUMEUP"

0x16 = "KEY_0"
0x19 = "KEY_SHUFFLE"
0x0d = ""

0x0c = "KEY_1"
0x18 = "KEY_2"
0x5e = "KEY_3"
0x08 = "KEY_4"
0x1c = "KEY_5"
0x5a = "KEY_6"
0x42 = "KEY_7"
0x52 = "KEY_8"
0x4a = "KEY_9"

Clear the keytable and test with your config file

ir-keytable -c -w /lib/udev/rc_keymaps/my_remote.toml -t

Add the remote def to /etc/rc_maps.cfg

#driver table                    file
*       *                        my_remote.toml

Load it on boot

create service

mobilemouse /etc/init.d # cat irkeytable
#!/sbin/openrc-run
# Copyright 2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

name="irkeytable"
description="add irkeytable config"

start() {
    /usr/bin/ir-keytable -a /etc/rc_maps.cfg -s rc0
}

add to default run level
```
rc-update add irkeytable default
```

Add any modules that you might need to autoload (my case was: ir-nec-decoder and ir-lirc-codec)
```
echo "ir-nec-decoder\nir-lirc-codec" >> /etc/modprobe.d/lirc.conf
```

Reboot to verify its good and test with evtest

austin@mobilemouse ~/mocp_i2c_lcd_ir_remote $ evtest
No device specified, trying to scan all of /dev/input/event*
Not running as root, no devices may be available.
Available devices:
/dev/input/event0:      Solid State System Co.,Ltd. USB PnP Audio Device
/dev/input/event5:      meson_ao_cec
/dev/input/event6:      meson-ir
Select the device event number [0-6]: 6
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "meson-ir"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 2 (KEY_1)
    Event code 3 (KEY_2)
    Event code 4 (KEY_3)
    Event code 5 (KEY_4)
    Event code 6 (KEY_5)
    Event code 7 (KEY_6)
    Event code 8 (KEY_7)
    Event code 9 (KEY_8)
    Event code 10 (KEY_9)
    Event code 11 (KEY_0)
    Event code 113 (KEY_MUTE)
    Event code 114 (KEY_VOLUMEDOWN)
    Event code 115 (KEY_VOLUMEUP)
    Event code 116 (KEY_POWER)
    Event code 158 (KEY_BACK)
    Event code 159 (KEY_FORWARD)
    Event code 164 (KEY_PLAYPAUSE)
    Event code 373 (KEY_MODE)
    Event code 410 (KEY_SHUFFLE)
  Event type 2 (EV_REL)
    Event code 0 (REL_X)
    Event code 1 (REL_Y)
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Key repeat handling:
  Repeat type 20 (EV_REP)
    Repeat code 0 (REP_DELAY)
      Value    400
    Repeat code 1 (REP_PERIOD)
      Value     80
Properties:
  Property type 5 (INPUT_PROP_POINTING_STICK)
Testing ... (interrupt to exit)

Once evtest is working you can code against it: My Example controlling moc

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Setting up lirc and evdev on Le Potato

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