Messages in this thread | | | Date | Fri, 30 Jul 2021 14:18:30 +0800 | Subject | [PATCH v4 0/2] TCPM non-PD mode | From | Kyle Tso <> |
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cover-letter is the same as that in v3
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 v3:
usb: typec: tcpm: Support non-PD mode - commit msg updated - removed unnecessary empty lines - re-factored the code of reading device tree properties and the error handling - removed unnecessay variable initialization - modified the comments
Kyle Tso (2): dt-bindings: connector: Add pd-supported 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
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