[RFC,0/3] usb: Add generic repeater framework and SM8550 driver

Message

Abel Vesa Nov. 16, 2022, 12:30 p.m. UTC

This patchset adds a generic USB repeater framework to be used by
platforms that have eUSB2 support and want to have USB 2.0 compliance.
In such cases there is a device between the eUSB2 PHY and the actual
connector. That device is basically a repeater and the most important
thing it does is to level shift in both directions. Such a device needs
to be controlled in software usually by the PHY or by the HC.
So add a generic framework with basic ops to allow consumer drivers
to get a phandle to it and to control it.

Also add the SM8550 PMIC eUSB2 repeater which uses the generic
framework.

Abel Vesa (3):
  usb: Add USB repeater generic framework
  dt-bindings: usb: Add qcom,snps-eusb2-repeater schema
  usb: repeater: Add Qualcomm PMIC eUSB2 driver

 .../usb/qcom,snps-eusb2-repeater.yaml         |  43 +++
 drivers/usb/Kconfig                           |   2 +
 drivers/usb/Makefile                          |   2 +
 drivers/usb/repeater/Kconfig                  |  20 ++
 drivers/usb/repeater/Makefile                 |   7 +
 .../usb/repeater/repeater-qcom-pmic-eusb2.c   | 251 ++++++++++++++++++
 drivers/usb/repeater/repeater.c               | 198 ++++++++++++++
 include/linux/usb/repeater.h                  |  78 ++++++
 8 files changed, 601 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/qcom,snps-eusb2-repeater.yaml
 create mode 100644 drivers/usb/repeater/Kconfig
 create mode 100644 drivers/usb/repeater/Makefile
 create mode 100644 drivers/usb/repeater/repeater-qcom-pmic-eusb2.c
 create mode 100644 drivers/usb/repeater/repeater.c
 create mode 100644 include/linux/usb/repeater.h