mbox series

[v5,0/2] TCPM non-PD mode

Message ID 20210730124348.1986638-1-kyletso@google.com
Headers show
Series TCPM non-PD mode | expand

Message

Kyle Tso July 30, 2021, 12:43 p.m. UTC 
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(-)