Hans de Goede
04b457d8ef
The Asus TF103C misses the home button in its PNP0C40 GPIO resources causing the button mappings for the volume buttons to be off by one, leading to the volume-up button sending home button presses and the volume-down button sending volume-up button presses. Add a 60-keyboard hwdb entry to correct the mappings. Note this is split over 2 input devices because the soc_button_array driver creates separate input devices for power + home and vol up/down. This is done because power/home act as wakeup buttons where as the volume buttons do not. This means that after this fixup the home -> volume-up button still acts as a wakeup button, there is nothing which can be done about this without adding a kludge to the kernel which is not worth the trouble (IMHO).
Files in this directory specify a description of hardware devices, in the form of mappings from modalias-like keys (which identify specific hardware devices) to udev properties. Files in this directory are not read by udev directly. Instead, man:systemd-hwdb(8) compiles them into a binary database. See man:hwdb(7) for an overview of the configuration file format, and man:systemd-udevd.service(8) for a description of the udev daemon. Use 'systemd-analyze cat-config udev/hwdb.d' to display the effective config.