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| author | Won Chung <wonchung@google.com> | 2022-03-14 20:54:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 09:51:57 +0200 |
| commit | 6423d2951087231706246f81851067f7f0593d4a (patch) | |
| tree | 7bef65f539da19fd619fa25ebf70015dd337ea59 /drivers/base/Makefile | |
| parent | platform: finally disallow IRQ0 in platform_get_irq() and its ilk (diff) | |
| download | linux-6423d2951087231706246f81851067f7f0593d4a.tar.xz linux-6423d2951087231706246f81851067f7f0593d4a.zip | |
driver core: Add sysfs support for physical location of a device
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>
Diffstat (limited to 'drivers/base/Makefile')
| -rw-r--r-- | drivers/base/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/base/Makefile b/drivers/base/Makefile index 02f7f1358e86..83217d243c25 100644 --- a/drivers/base/Makefile +++ b/drivers/base/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o obj-$(CONFIG_GENERIC_MSI_IRQ_DOMAIN) += platform-msi.o obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o +obj-$(CONFIG_ACPI) += physical_location.o obj-y += test/ |