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* [PATCH v2 0/2] TCPM non-pd mode
@ 2021-07-27 15:13 Kyle Tso
  2021-07-27 15:13 ` [PATCH v2 1/2] dt-bindings: connector: Add pd-supported property Kyle Tso
  2021-07-27 15:13 ` [PATCH v2 2/2] usb: typec: tcpm: Support non-PD mode Kyle Tso
  0 siblings, 2 replies; 6+ messages in thread
From: Kyle Tso @ 2021-07-27 15:13 UTC (permalink / raw)
  To: linux, heikki.krogerus, gregkh, robh+dt
  Cc: badhri, linux-usb, linux-kernel, devicetree, Kyle Tso

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-supported" is introduced and TCPM uses this
property as a flag to decide whether PD is supported. If the flag is
false, 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 as what it was before.

If "pd-supported" is not 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 v1:
- revise the patch to use dt properties

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

 .../bindings/connector/usb-connector.yaml     |   5 +
 drivers/usb/typec/tcpm/tcpm.c                 | 108 +++++++++++++-----
 2 files changed, 84 insertions(+), 29 deletions(-)

-- 
2.32.0.432.gabb21c7263-goog


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-07-28  2:11 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-27 15:13 [PATCH v2 0/2] TCPM non-pd mode Kyle Tso
2021-07-27 15:13 ` [PATCH v2 1/2] dt-bindings: connector: Add pd-supported property Kyle Tso
2021-07-27 16:29   ` Guenter Roeck
2021-07-27 15:13 ` [PATCH v2 2/2] usb: typec: tcpm: Support non-PD mode Kyle Tso
2021-07-27 22:46   ` Guenter Roeck
2021-07-28  2:11     ` Kyle Tso

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