Man page 9 : input_scancode_to_scalar

input_scancode_to_scalar - converts scancode in struct input_keymap_entry

int input_scancode_to_scalar(const struct input_keymap_entry *  ke , unsigned int *  scancode );

ke
    keymap entry containing scancode to be converted.

scancode
    pointer to the location where converted scancode should be stored.

This function is used to convert scancode stored in struct keymap_entry into scalar form understood by legacy keymap handling methods. These methods expect scancodes to be represented as Aqunsigned intAq.