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[0/4] arm64: qcom: sm8550: retrieve USB-C port orientation from gpio

Message ID 20230804-topic-sm8550-upstream-type-c-orientation-v1-0-36dd3edec7bf@linaro.org (mailing list archive)
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Series arm64: qcom: sm8550: retrieve USB-C port orientation from gpio | expand

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Neil Armstrong Aug. 4, 2023, 1:50 p.m. UTC 
This patchset is derived from [1], with only the GPIO orientation.

On the SM8550 platform, the PMIC Glink firmware doesn't emit
ALTMODE events for all USB-C port changes like it was done
for older platforms (like SM8450).
This means we only have a valid orientation when an Altmode
compliant device is inserted, but not for all the other devices,
including USB cables, dongles and non-altmode Hubs.

But the actual orientation is shared by the PM8550B by
a signal called CC_OUT which can be read on a gpio of the SM8550
SoC.

Let's add support for this feature by using the UCSI PMIC
Glink driver events to read and dispatch the orientation
to the USB-C connector devices on the DT graph.

While everybody would prefer having a proper PMIC Glink event
for an orientation change, this is not implemented and not
planned for future platforms either.

[1] https://lore.kernel.org/all/20230601-topic-sm8550-upstream-type-c-v3-0-22c9973012b6@linaro.org/

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
Neil Armstrong (4):
      dt-bindings: soc: qcom: qcom,pmic-glink: add a gpio used to determine the Type-C port plug orientation
      usb: ucsi: glink: use the connector orientation GPIO to provide switch events
      arm64: dts: qcom: sm8550-mtp: add orientation gpio
      arm64: dts: qcom: sm8550-qrd: add orientation gpio

 .../bindings/soc/qcom/qcom,pmic-glink.yaml         | 18 ++++++++
 arch/arm64/boot/dts/qcom/sm8550-mtp.dts            |  1 +
 arch/arm64/boot/dts/qcom/sm8550-qrd.dts            |  1 +
 drivers/usb/typec/ucsi/ucsi_glink.c                | 54 +++++++++++++++++++++-
 4 files changed, 73 insertions(+), 1 deletion(-)
---
base-commit: fb4327106e5250ee360d0d8b056c1eef7eeb9a98
change-id: 20230804-topic-sm8550-upstream-type-c-orientation-0bbbb360d3f7

Best regards,