linux-kernel - [PATCH 00/19] Enable Qualcomm QCS 404 HS/SS USB

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Message-Id: <20200115141333.1222676-1-bryan.odonoghue@linaro.org>
Date:   Wed, 15 Jan 2020 14:13:14 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        gregkh@...uxfoundation.org, jackp@...eaurora.org, balbi@...nel.org,
        bjorn.andersson@...aro.org
Cc:     linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH 00/19] Enable Qualcomm QCS 404 HS/SS USB

This series enables the Primary and Secondary USB controllers on the
QCS404, associated PHYs, role-switching and DTS descriptions.

The series takes in a number of patches worked on by a number of people
over the past few years from downstream, through to previous upstream
submissions for both of these interfaces. Additional work has been done to
enable USB role-switching.

1. USB SS
   - extcon has been dropped in favour of gpio-usb-conn as discussed and
     agreed previously by Jorge, Bjorn, Stephen Boyd and Jack Pham [1].

   - Regulator API has been updated following suggestions from Bjorn.
   
   - Sanitzation of the DT compatible name - dropped "snps" entirely
     from the name - it made almost no sense to me and doesn't appear
     consistent with similar naming conventions for Snopsys based IP.

2. USB HS
   - Regulator API changes here.
   - Dropped "snps" from the namespace for similar reasons as above.
   - Dropped "28nm" from the namespace, looked superflous.
   - Changed "High-Speed" to "Hi-Speed".
   - [2]

3. DWC3 Role switching
   - At the time usb-gpio-conn was discussed it was mentioned that
     role-switching was absent from the DWC3 driver.
   - John Stultz has some patches in-flight for that, that I've included in
     this series for completeness.

4. DWC3 usb-gpio-conn
   Needs to be a child node of the DWC3 driver so some code and DT binding
   is required for that.

5. QCOM-DWC3
   Since we are role-switching with an external PMIC supplying VBUS we want
   to skip past toggling VBUS from QCOM-DWC3 controlled registers, so a
   patch is added to the qcom-dwc3 driver to do that.

6. DWC3 USB Role Switching
   - Includes some patches in-flight from John Stultz.
   - Adds my SoB to relevant patches.
   - Drops gerrit ChangeId.

References:

1: USB SS PHY for Qualcomm's QCS404
https://lwn.net/ml/devicetree/20190207111734.24171-1-jorge.ramirez-ortiz@linaro.org/

2: Add Synopsys High-Speed USB PHY driver for Qualcomm SoCs
https://lore.kernel.org/linux-arm-msm/20181127100722.9993-3-shawn.guo@linaro.org/

Bjorn Andersson (1):
  arm64: dts: qcom: qcs404: Add USB devices and PHYs

Bryan O'Donoghue (10):
  dt-bindings: usb: dwc3: Add a gpio-usb-connector description
  usb: dwc3: qcom: Override VBUS when using gpio_usb_connector
  usb: dwc3: Add support for usb-conn-gpio connectors
  arm64: dts: qcom: qcs404-evb: Define VBUS detect pin
  arm64: dts: qcom: qcs404-evb: Define VBUS boost pin
  arm64: dts: qcom: qcs404-evb: Define USB ID pin
  arm64: dts: qcom: qcs404-evb: Describe external VBUS regulator
  arm64: dts: qcom: qcs404-evb: Raise vreg_l12_3p3 minimum voltage
  arm64: dts: qcom: qcs404-evb: Enable secondary USB controller
  arm64: dts: qcom: qcs404-evb: Enable primary USB controller

John Stultz (2):
  dt-bindings: usb: generic: Add role-switch-default-mode binding
  usb: dwc3: Add support for role-switch-default-mode binding

Jorge Ramirez-Ortiz (3):
  dt-bindings: phy: remove qcom-dwc3-usb-phy
  dt-bindings: Add Qualcomm USB SuperSpeed PHY bindings
  phy: qualcomm: usb: Add SuperSpeed PHY driver

Shawn Guo (1):
  phy: qualcomm: Add Synopsys Hi-Speed USB PHY driver

Sriharsha Allenki (1):
  dt-bindings: phy: Add Qualcomm Synopsys Hi-Speed USB PHY binding

Yu Chen (1):
  usb: dwc3: Registering a role switch in the DRD code.

 .../bindings/phy/qcom,qcs404-usb-hs.yaml      |  78 ++++
 .../bindings/phy/qcom-dwc3-usb-phy.txt        |  37 --
 .../devicetree/bindings/qcom,usb-ss.yaml      |  74 ++++
 .../devicetree/bindings/usb/dwc3.txt          |  11 +
 .../devicetree/bindings/usb/generic.txt       |   6 +
 arch/arm64/boot/dts/qcom/qcs404-evb.dtsi      |  90 +++-
 arch/arm64/boot/dts/qcom/qcs404.dtsi          | 100 +++++
 drivers/phy/qualcomm/Kconfig                  |  21 +
 drivers/phy/qualcomm/Makefile                 |   2 +
 drivers/phy/qualcomm/phy-qcom-qcs404-usb-hs.c | 415 ++++++++++++++++++
 drivers/phy/qualcomm/phy-qcom-usb-ss.c        | 246 +++++++++++
 drivers/usb/dwc3/core.h                       |   6 +
 drivers/usb/dwc3/drd.c                        | 123 +++++-
 drivers/usb/dwc3/dwc3-qcom.c                  |  17 +-
 14 files changed, 1184 insertions(+), 42 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/phy/qcom,qcs404-usb-hs.yaml
 delete mode 100644 Documentation/devicetree/bindings/phy/qcom-dwc3-usb-phy.txt
 create mode 100644 Documentation/devicetree/bindings/qcom,usb-ss.yaml
 create mode 100644 drivers/phy/qualcomm/phy-qcom-qcs404-usb-hs.c
 create mode 100644 drivers/phy/qualcomm/phy-qcom-usb-ss.c

-- 
2.24.0