en Copyright 2015 Java http://172.16.0.5:8080/history/linux-6.15/Documentation/ABI/testing/sysfs-driver-input-cros-ec-keyb#820c8727 Input: cros-ec-keyb - expose function row physical map to userspaceThe top-row keys in a keyboard usually have dual functionalities.E.g. A function key "F1" is also an action key "Browser back".Therefore, when an application receives an action key code froma top-row key press, the application needs to know how to correlatethe action key code with the function key code and do the conversionwhenever necessary.Since the userpace already knows the key scanlines (row/column)associated with a received key code. Essentially, the userspace onlyneeds a mapping between the key row/column and the matching physicallocation in the top row.So, enhance the cros-ec-keyb driver to create such a mappingand expose it to userspace in the form of a function_row_physmapattribute. The attribute would be a space separated ordered list ofrow/column codes for the keys in the function row, in a left-to-rightorder.The attribute will only be present when the device has a custom designfor the top-row keys.Signed-off-by: Philip Chen <philipchen@chromium.org>Reviewed-by: Stephen Boyd <swboyd@chromium.org>Link: https://lore.kernel.org/r/20210115122412.v7.2.I6542d7d9d0b246e7079bb16b41e697b2ac4b4e39@changeidSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> List of files: /linux-6.15/Documentation/ABI/testing/sysfs-driver-input-cros-ec-keyb Tue, 23 Feb 2021 05:05:04 +0000 Philip Chen <philipchen@chromium.org>