projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| dbf0c5a6 | 1 | .. SPDX-License-Identifier: GPL-2.0+ |
| c9389ad8 | 2 | |
| 27c054d2 | 3 | |
| dbf0c5a6 MZA |
4 | LG Gram laptop extra features |
| 5 | ============================= | |
| 6 | ||
| 7 | By Matan Ziv-Av <matan@svgalib.org> | |
| 8 | ||
| 9 | ||
| 10 | Hotkeys | |
| 11 | ------- | |
| 12 | ||
| 13 | The following FN keys are ignored by the kernel without this driver: | |
| c9389ad8 | 14 | |
| dbf0c5a6 MZA |
15 | - FN-F1 (LG control panel) - Generates F15 |
| 16 | - FN-F5 (Touchpad toggle) - Generates F13 | |
| 17 | - FN-F6 (Airplane mode) - Generates RFKILL | |
| 18 | - FN-F8 (Keyboard backlight) - Generates F16. | |
| 19 | This key also changes keyboard backlight mode. | |
| 20 | - FN-F9 (Reader mode) - Generates F14 | |
| 21 | ||
| c9389ad8 | 22 | The rest of the FN keys work without a need for a special driver. |
| dbf0c5a6 MZA |
23 | |
| 24 | ||
| 25 | Reader mode | |
| 26 | ----------- | |
| 27 | ||
| 28 | Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables | |
| 29 | reader mode. In this mode the screen colors change (blue color reduced), | |
| 30 | and the reader mode indicator LED (on F9 key) turns on. | |
| 31 | ||
| 32 | ||
| 33 | FN Lock | |
| 34 | ------- | |
| 35 | ||
| 36 | Writing 0/1 to /sys/devices/platform/lg-laptop/fn_lock disables/enables | |
| 37 | FN lock. | |
| 38 | ||
| 39 | ||
| 40 | Battery care limit | |
| 41 | ------------------ | |
| 42 | ||
| 43 | Writing 80/100 to /sys/devices/platform/lg-laptop/battery_care_limit | |
| 44 | sets the maximum capacity to charge the battery. Limiting the charge | |
| 45 | reduces battery capacity loss over time. | |
| 46 | ||
| 47 | This value is reset to 100 when the kernel boots. | |
| 48 | ||
| 49 | ||
| 50 | Fan mode | |
| 51 | -------- | |
| 52 | ||
| 53 | Writing 1/0 to /sys/devices/platform/lg-laptop/fan_mode disables/enables | |
| 54 | the fan silent mode. | |
| 55 | ||
| 56 | ||
| 57 | USB charge | |
| 58 | ---------- | |
| 59 | ||
| 60 | Writing 0/1 to /sys/devices/platform/lg-laptop/usb_charge disables/enables | |
| 61 | charging another device from the USB port while the device is turned off. | |
| 62 | ||
| 63 | This value is reset to 0 when the kernel boots. | |
| 64 | ||
| 65 | ||
| 66 | LEDs | |
| 67 | ~~~~ | |
| 68 | ||
| 69 | The are two LED devices supported by the driver: | |
| 70 | ||
| 71 | Keyboard backlight | |
| 72 | ------------------ | |
| 73 | ||
| 74 | A led device named kbd_led controls the keyboard backlight. There are three | |
| 75 | lighting level: off (0), low (127) and high (255). | |
| 76 | ||
| 77 | The keyboard backlight is also controlled by the key combination FN-F8 | |
| 78 | which cycles through those levels. | |
| 79 | ||
| 80 | ||
| 81 | Touchpad indicator LED | |
| 82 | ---------------------- | |
| 83 | ||
| 84 | On the F5 key. Controlled by led device names tpad_led. |