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platform/surface: aggregator: Add comment for KIP subsystem category

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The KIP subsystem (full name unknown, abbreviation has been obtained
through reverse engineering) handles detachable peripherals such as the
keyboard cover on the Surface Pro X and Surface Pro 8.

It is currently not entirely clear what this subsystem entails, but at
the very least it provides event notifications for when the keyboard
cover on the Surface Pro X and Surface Pro 8 have been detached or
re-attached, as well as the state that the keyboard cover is currently
in (e.g. folded-back, folded laptop-like, closed, etc.).

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20220527023447.2460025-9-luzmaximilian@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Maximilian Luz 2022-05-27 04:34:43 +02:00 committed by Hans de Goede
parent 2c2c3a0708
commit 25e2ca7301
1 changed files with 1 additions and 1 deletions
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2
include/linux/surface_aggregator/serial_hub.h
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@ -306,7 +306,7 @@ enum ssam_ssh_tc {
SSAM_SSH_TC_LPC = 0x0b,
SSAM_SSH_TC_TCL = 0x0c,
SSAM_SSH_TC_SFL = 0x0d,
SSAM_SSH_TC_KIP = 0x0e,
SSAM_SSH_TC_KIP = 0x0e, /* Manages detachable peripherals (Pro X/8 keyboard cover) */
SSAM_SSH_TC_EXT = 0x0f,
SSAM_SSH_TC_BLD = 0x10,
SSAM_SSH_TC_BAS = 0x11, /* Detachment system (Surface Book 2/3). */