Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.12.80 2023-03-24T14:35:48+00:00 2023-03-24T14:35:48+00:00 Greg Kroah-Hartman gregkh@linuxfoundation.org 2023-03-24T12:27:10+00:00 urn:sha1:3e44d5c9e987c32e5bdc9de2c166f622cc81e15d The kernel coding style does not require 'extern' in function prototypes in .h files, so remove them from drivers/base/physical_location.h as they are not needed. Acked-by: Rafael J. Wysocki <rafael@kernel.org> Link: https://lore.kernel.org/r/20230324122711.2664537-5-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2022-04-27T07:51:57+00:00 Won Chung wonchung@google.com 2022-03-14T19:54:58+00:00 urn:sha1:6423d2951087231706246f81851067f7f0593d4a When ACPI table includes _PLD fields for a device, create a new directory (physical_location) in sysfs to share _PLD fields. Currently without PLD information, when there are multiple of same devices, it is hard to distinguish which device corresponds to which physical device at which location. For example, when there are two Type C connectors, it is hard to find out which connector corresponds to the Type C port on the left panel versus the Type C port on the right panel. With PLD information provided, we can determine which specific device at which location is doing what. _PLD output includes much more fields, but only generic fields are added and exposed to sysfs, so that non-ACPI devices can also support it in the future. The minimal generic fields needed for locating a device are the following. - panel - vertical_position - horizontal_position - dock - lid Signed-off-by: Won Chung <wonchung@google.com> Link: https://lore.kernel.org/r/20220314195458.271430-1-wonchung@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>