19e1cbedeSMauro Carvalho Chehab.. SPDX-License-Identifier: GPL-2.0+ 29e1cbedeSMauro Carvalho Chehab 39e1cbedeSMauro Carvalho Chehab 49e1cbedeSMauro Carvalho ChehabLG Gram laptop extra features 59e1cbedeSMauro Carvalho Chehab============================= 69e1cbedeSMauro Carvalho Chehab 79e1cbedeSMauro Carvalho ChehabBy Matan Ziv-Av <matan@svgalib.org> 89e1cbedeSMauro Carvalho Chehab 99e1cbedeSMauro Carvalho Chehab 109e1cbedeSMauro Carvalho ChehabHotkeys 119e1cbedeSMauro Carvalho Chehab------- 129e1cbedeSMauro Carvalho Chehab 139e1cbedeSMauro Carvalho ChehabThe following FN keys are ignored by the kernel without this driver: 149e1cbedeSMauro Carvalho Chehab 159e1cbedeSMauro Carvalho Chehab- FN-F1 (LG control panel) - Generates F15 1685973bf4SMatan Ziv-Av- FN-F5 (Touchpad toggle) - Generates F21 179e1cbedeSMauro Carvalho Chehab- FN-F6 (Airplane mode) - Generates RFKILL 189e1cbedeSMauro Carvalho Chehab- FN-F9 (Reader mode) - Generates F14 199e1cbedeSMauro Carvalho Chehab 209e1cbedeSMauro Carvalho ChehabThe rest of the FN keys work without a need for a special driver. 219e1cbedeSMauro Carvalho Chehab 229e1cbedeSMauro Carvalho Chehab 239e1cbedeSMauro Carvalho ChehabReader mode 249e1cbedeSMauro Carvalho Chehab----------- 259e1cbedeSMauro Carvalho Chehab 269e1cbedeSMauro Carvalho ChehabWriting 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables 279e1cbedeSMauro Carvalho Chehabreader mode. In this mode the screen colors change (blue color reduced), 289e1cbedeSMauro Carvalho Chehaband the reader mode indicator LED (on F9 key) turns on. 299e1cbedeSMauro Carvalho Chehab 309e1cbedeSMauro Carvalho Chehab 319e1cbedeSMauro Carvalho ChehabFN Lock 329e1cbedeSMauro Carvalho Chehab------- 339e1cbedeSMauro Carvalho Chehab 349e1cbedeSMauro Carvalho ChehabWriting 0/1 to /sys/devices/platform/lg-laptop/fn_lock disables/enables 359e1cbedeSMauro Carvalho ChehabFN lock. 369e1cbedeSMauro Carvalho Chehab 379e1cbedeSMauro Carvalho Chehab 389e1cbedeSMauro Carvalho ChehabBattery care limit 399e1cbedeSMauro Carvalho Chehab------------------ 409e1cbedeSMauro Carvalho Chehab 41*07f5ed0eSMatan Ziv-AvWriting 80/100 to /sys/class/power_supply/CMB0/charge_control_end_threshold 429e1cbedeSMauro Carvalho Chehabsets the maximum capacity to charge the battery. Limiting the charge 439e1cbedeSMauro Carvalho Chehabreduces battery capacity loss over time. 449e1cbedeSMauro Carvalho Chehab 459e1cbedeSMauro Carvalho ChehabThis value is reset to 100 when the kernel boots. 469e1cbedeSMauro Carvalho Chehab 479e1cbedeSMauro Carvalho Chehab 489e1cbedeSMauro Carvalho ChehabFan mode 499e1cbedeSMauro Carvalho Chehab-------- 509e1cbedeSMauro Carvalho Chehab 519e1cbedeSMauro Carvalho ChehabWriting 1/0 to /sys/devices/platform/lg-laptop/fan_mode disables/enables 529e1cbedeSMauro Carvalho Chehabthe fan silent mode. 539e1cbedeSMauro Carvalho Chehab 549e1cbedeSMauro Carvalho Chehab 559e1cbedeSMauro Carvalho ChehabUSB charge 569e1cbedeSMauro Carvalho Chehab---------- 579e1cbedeSMauro Carvalho Chehab 589e1cbedeSMauro Carvalho ChehabWriting 0/1 to /sys/devices/platform/lg-laptop/usb_charge disables/enables 599e1cbedeSMauro Carvalho Chehabcharging another device from the USB port while the device is turned off. 609e1cbedeSMauro Carvalho Chehab 619e1cbedeSMauro Carvalho ChehabThis value is reset to 0 when the kernel boots. 629e1cbedeSMauro Carvalho Chehab 639e1cbedeSMauro Carvalho Chehab 649e1cbedeSMauro Carvalho ChehabLEDs 659e1cbedeSMauro Carvalho Chehab~~~~ 669e1cbedeSMauro Carvalho Chehab 679e1cbedeSMauro Carvalho ChehabThe are two LED devices supported by the driver: 689e1cbedeSMauro Carvalho Chehab 699e1cbedeSMauro Carvalho ChehabKeyboard backlight 709e1cbedeSMauro Carvalho Chehab------------------ 719e1cbedeSMauro Carvalho Chehab 729e1cbedeSMauro Carvalho ChehabA led device named kbd_led controls the keyboard backlight. There are three 739e1cbedeSMauro Carvalho Chehablighting level: off (0), low (127) and high (255). 749e1cbedeSMauro Carvalho Chehab 759e1cbedeSMauro Carvalho ChehabThe keyboard backlight is also controlled by the key combination FN-F8 769e1cbedeSMauro Carvalho Chehabwhich cycles through those levels. 779e1cbedeSMauro Carvalho Chehab 789e1cbedeSMauro Carvalho Chehab 799e1cbedeSMauro Carvalho ChehabTouchpad indicator LED 809e1cbedeSMauro Carvalho Chehab---------------------- 819e1cbedeSMauro Carvalho Chehab 829e1cbedeSMauro Carvalho ChehabOn the F5 key. Controlled by led device names tpad_led. 83