ACPI: dock: document sysfs interface

Web:        https://git.kernel.org/torvalds/c/22029845ad81033115910cdef35170de6a10a1eb
Commit:     22029845ad81033115910cdef35170de6a10a1eb
Parent:     6b4af818c7d7a35a861c94596e05e43596e5fd28
Refname:    refs/heads/master
Author:     Aishwarya Pant <[email protected]>
AuthorDate: Sat Feb 10 14:27:38 2018 +0530
Committer:  Rafael J. Wysocki <[email protected]>
CommitDate: Mon Feb 12 11:24:55 2018 +0100

    ACPI: dock: document sysfs interface
    
    Description has been collected from git commit history and reading
    through code.
    
    Signed-off-by: Aishwarya Pant <[email protected]>
    Signed-off-by: Rafael J. Wysocki <[email protected]>
---
 .../ABI/testing/sysfs-devices-platform-dock        | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-devices-platform-dock b/Documentation/ABI/testing/sysfs-devices-platform-dock
new file mode 100644
index 000000000000..1d8c18f905c7
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-devices-platform-dock
@@ -0,0 +1,39 @@
+What:		/sys/devices/platform/dock.N/docked
+Date:		Dec, 2006
+KernelVersion:	2.6.19
+Contact:	[email protected]
+Description:
+		(RO) Value 1 or 0 indicates whether the software believes the
+		laptop is docked in a docking station.
+
+What:		/sys/devices/platform/dock.N/undock
+Date:		Dec, 2006
+KernelVersion:	2.6.19
+Contact:	[email protected]
+Description:
+		(WO) Writing to this file causes the software to initiate an
+		undock request to the firmware.
+
+What:		/sys/devices/platform/dock.N/uid
+Date:		Feb, 2007
+KernelVersion:	v2.6.21
+Contact:	[email protected]
+Description:
+		(RO) Displays the docking station the laptop is docked to.
+
+What:		/sys/devices/platform/dock.N/flags
+Date:		May, 2007
+KernelVersion:	v2.6.21
+Contact:	[email protected]
+Description:
+		(RO) Show dock station flags, useful for checking if undock
+		request has been made by the user (from the immediate_undock
+		option).
+
+What:		/sys/devices/platform/dock.N/type
+Date:		Aug, 2008
+KernelVersion:	v2.6.27
+Contact:	[email protected]
+Description:
+		(RO) Display the dock station type- dock_station, ata_bay or
+		battery_bay.
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