LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* [PATCH v5 0/2] TCPM non-PD mode
@ 2021-07-30 12:43 Kyle Tso
  2021-07-30 12:43 ` [PATCH v5 1/2] dt-bindings: connector: Add pd-unsupported property Kyle Tso
  2021-07-30 12:43 ` [PATCH v5 2/2] usb: typec: tcpm: Support non-PD mode Kyle Tso
  0 siblings, 2 replies; 4+ messages in thread
From: Kyle Tso @ 2021-07-30 12:43 UTC (permalink / raw)
  To: linux, heikki.krogerus, gregkh, robh+dt
  Cc: badhri, linux-usb, linux-kernel, devicetree, Kyle Tso

cover-letter is the same as that in v4

The reason for this patch is to let the device/system policy decide
whether PD is going to be supported using devicetree properties.

A new dt property "pd-unsupported" is introduced and TCPM uses this
property as a flag to decide whether PD is supported. If the flag is
false (the dt property is not present), the RX functionality of the
low-level driver will not be enabled. The power negotiation related
states will be skipped as well. If the flag is true, everything is a
what it was before.

If "pd-unsupported" is present, and the port is SRC or DRP, another
existing dt property "typec-power-opmode" needs to be specified to
indicate which Rp value should be used when the port is SRC.

changes since v4:
dt-bindings: connector: Add pd-unsupported property
- Corrected the subject

usb: typec: tcpm: Support non-PD mode
- Added Reviewed-by

Kyle Tso (2):
  dt-bindings: connector: Add pd-unsupported property
  usb: typec: tcpm: Support non-PD mode

 .../bindings/connector/usb-connector.yaml     |  4 +
 drivers/usb/typec/tcpm/tcpm.c                 | 87 +++++++++++++++----
 2 files changed, 72 insertions(+), 19 deletions(-)

-- 
2.32.0.554.ge1b32706d8-goog


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-07-30 15:55 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-30 12:43 [PATCH v5 0/2] TCPM non-PD mode Kyle Tso
2021-07-30 12:43 ` [PATCH v5 1/2] dt-bindings: connector: Add pd-unsupported property Kyle Tso
2021-07-30 12:43 ` [PATCH v5 2/2] usb: typec: tcpm: Support non-PD mode Kyle Tso
2021-07-30 15:55   ` Heikki Krogerus

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).