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.. SPDX-License-Identifier: GPL-2.0+ LG Gram laptop extra features ============================= By Matan Ziv-Av <matan@svgalib.org> Hotkeys ------- The following FN keys are ignored by the kernel without this driver: - FN-F1 (LG control panel) - Generates F15 - FN-F5 (Touchpad toggle) - Generates F21 - FN-F6 (Airplane mode) - Generates RFKILL - FN-F9 (Reader mode) - Generates F14 The rest of the FN keys work without a need for a special driver. Reader mode ----------- Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables reader mode. In this mode the screen colors change (blue color reduced), and the reader mode indicator LED (on F9 key) turns on. FN Lock ------- Writing 0/1 to /sys/devices/platform/lg-laptop/fn_lock disables/enables FN lock. Battery care limit ------------------ Writing 80/100 to /sys/class/power_supply/CMB0/charge_control_end_threshold sets the maximum capacity to charge the battery. Limiting the charge reduces battery capacity loss over time. This value is reset to 100 when the kernel boots. Fan mode -------- Writing 1/0 to /sys/devices/platform/lg-laptop/fan_mode disables/enables the fan silent mode. USB charge ---------- Writing 0/1 to /sys/devices/platform/lg-laptop/usb_charge disables/enables charging another device from the USB port while the device is turned off. This value is reset to 0 when the kernel boots. LEDs ~~~~ The are two LED devices supported by the driver: Keyboard backlight ------------------ A led device named kbd_led controls the keyboard backlight. There are three lighting level: off (0), low (127) and high (255). The keyboard backlight is also controlled by the key combination FN-F8 which cycles through those levels. Touchpad indicator LED ---------------------- On the F5 key. Controlled by led device names tpad_led. |