1 .. SPDX-License-Identifier: GPL-2.0+ 1 .. SPDX-License-Identifier: GPL-2.0+
2 2
3 3
4 LG Gram laptop extra features 4 LG Gram laptop extra features
5 ============================= 5 =============================
6 6
7 By Matan Ziv-Av <matan@svgalib.org> 7 By Matan Ziv-Av <matan@svgalib.org>
8 8
9 9
10 Hotkeys 10 Hotkeys
11 ------- 11 -------
12 12
13 The following FN keys are ignored by the kerne 13 The following FN keys are ignored by the kernel without this driver:
14 14
15 - FN-F1 (LG control panel) - Generates F15 15 - FN-F1 (LG control panel) - Generates F15
16 - FN-F5 (Touchpad toggle) - Generates F21 16 - FN-F5 (Touchpad toggle) - Generates F21
17 - FN-F6 (Airplane mode) - Generates RFKIL 17 - FN-F6 (Airplane mode) - Generates RFKILL
18 - FN-F9 (Reader mode) - Generates F14 18 - FN-F9 (Reader mode) - Generates F14
19 19
20 The rest of the FN keys work without a need fo 20 The rest of the FN keys work without a need for a special driver.
21 21
22 22
23 Reader mode 23 Reader mode
24 ----------- 24 -----------
25 25
26 Writing 0/1 to /sys/devices/platform/lg-laptop 26 Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables
27 reader mode. In this mode the screen colors ch 27 reader mode. In this mode the screen colors change (blue color reduced),
28 and the reader mode indicator LED (on F9 key) 28 and the reader mode indicator LED (on F9 key) turns on.
29 29
30 30
31 FN Lock 31 FN Lock
32 ------- 32 -------
33 33
34 Writing 0/1 to /sys/devices/platform/lg-laptop 34 Writing 0/1 to /sys/devices/platform/lg-laptop/fn_lock disables/enables
35 FN lock. 35 FN lock.
36 36
37 37
38 Battery care limit 38 Battery care limit
39 ------------------ 39 ------------------
40 40
41 Writing 80/100 to /sys/class/power_supply/CMB0 41 Writing 80/100 to /sys/class/power_supply/CMB0/charge_control_end_threshold
42 sets the maximum capacity to charge the batter 42 sets the maximum capacity to charge the battery. Limiting the charge
43 reduces battery capacity loss over time. 43 reduces battery capacity loss over time.
44 44
45 This value is reset to 100 when the kernel boo 45 This value is reset to 100 when the kernel boots.
46 46
47 47
48 Fan mode 48 Fan mode
49 -------- 49 --------
50 50
51 Writing 1/0 to /sys/devices/platform/lg-laptop 51 Writing 1/0 to /sys/devices/platform/lg-laptop/fan_mode disables/enables
52 the fan silent mode. 52 the fan silent mode.
53 53
54 54
55 USB charge 55 USB charge
56 ---------- 56 ----------
57 57
58 Writing 0/1 to /sys/devices/platform/lg-laptop 58 Writing 0/1 to /sys/devices/platform/lg-laptop/usb_charge disables/enables
59 charging another device from the USB port whil 59 charging another device from the USB port while the device is turned off.
60 60
61 This value is reset to 0 when the kernel boots 61 This value is reset to 0 when the kernel boots.
62 62
63 63
64 LEDs 64 LEDs
65 ~~~~ 65 ~~~~
66 66
67 The are two LED devices supported by the drive 67 The are two LED devices supported by the driver:
68 68
69 Keyboard backlight 69 Keyboard backlight
70 ------------------ 70 ------------------
71 71
72 A led device named kbd_led controls the keyboa 72 A led device named kbd_led controls the keyboard backlight. There are three
73 lighting level: off (0), low (127) and high (2 73 lighting level: off (0), low (127) and high (255).
74 74
75 The keyboard backlight is also controlled by t 75 The keyboard backlight is also controlled by the key combination FN-F8
76 which cycles through those levels. 76 which cycles through those levels.
77 77
78 78
79 Touchpad indicator LED 79 Touchpad indicator LED
80 ---------------------- 80 ----------------------
81 81
82 On the F5 key. Controlled by led device names 82 On the F5 key. Controlled by led device names tpad_led.
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