usb: typec: tcpm: Add support for Battery Cap response message

Browse source

Add support for responding to Get_Battery_Cap (extended) request with a
a Battery_Capabilities (extended) msg. The requester will request
Battery Cap for a specific battery using an index in Get_Battery_Cap. In
case of failure to identify battery, TCPM shall reply with an
appropriate message indicating so.

As the Battery Cap Data Block size is 9 Bytes (lesser than
MaxExtendedMsgChunkLen of 26B), only a single chunk is required to
complete the AMS.

Support for Battery_Capabilities message is required for sinks that
contain battery as specified in USB PD Rev3.1 v1.8
("Applicability of Data Messages" section).

Signed-off-by: Amit Sunil Dhamne <amitsd@google.com>
Reviewed-by: Badhri Jagan Sridharan <badhri@google.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260714-batt-caps-upstream-v1-1-c86f0a7fbbda@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Amit Sunil Dhamne 2026-07-14 23:06:47 +00:00 • committed by Greg Kroah-Hartman

parent 6ffa374938

commit 9277b3b2d5

2 changed files with 117 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

108

drivers/usb/typec/tcpm/tcpm.c

View file

22

include/linux/usb/pd.h

View file