[00/13] airoha: en7581: clk cleanup + USB support

Message

Christian Marangi March 9, 2025, 1:29 p.m. UTC

This series implement all the changes required to correctly handle
USB support for the Airoha EN7581 SoC.

The first few patch are cleanup for the clock driver and the
introduction of the SCU SSR SoC driver.

The SoC always support USB 2.0 but for USB 3.0 it needs additional
configuration for the Serdes port. Such port can be either configured
for USB usage or for PCIe lines or HSGMII and these are configured
in the SCU space.

To correctly handle this, the SCU is changed to a simple-mfd
implemenetation and the clock controller updated to follow this new
node structure. Both implementation are supported to handle old
binding.

The xHCI USB is based on the Mediatek implementation but the PHY
handling although conceptually similar, is indded different compared
to Mediatek due to SSR checks and different port power up.

The SSR driver expose an API to poll the current status of the Serdes
port and the USB PHY driver validates it. Refer to the specific commit
for additional info.

Consider that there is currently an inconsistency as AN7581 and
EN7581 refer to the same thing. This is due to the fact that
the SoC born under EcoNet but then was acquired by Airoha.

Christian Marangi (13):
  clk: en7523: convert driver to regmap API
  clk: en7523: generalize register clocks function
  dt-bindings: soc: airoha: add SCU SSR Serdes port binding
  dt-bindings: soc: airoha: add Documentation for Airoha AN7581 SCU SSR
  dt-bindings: mfd: add Documentation for Airoha EN7581 SCU
  dt-bindings: clock: airoha: make reg optional for Airoha EN7581
  clk: en7523: support getting regmap from parent node for EN7581
  soc: airoha: add support for configuring SCU SSR Serdes port
  dt-bindings: phy: Add documentation for Airoha AN7581 USB PHY
  phy: airoha: Add support for Airoha AN7581 USB PHY
  usb: host: add ARCH_AIROHA in XHCI MTK dependency
  arm64: dts: airoha: en7581: convert SCU clock node to MFD
    implementation
  arm64: dts: airoha: en7581: add USB and SCU SSR nodes

 .../bindings/clock/airoha,en7523-scu.yaml     |  13 +-
 .../mfd/airoha,en7581-scu-sysctl.yaml         |  68 +++
 .../bindings/phy/airoha,an7581-usb-phy.yaml   | 106 ++++
 .../soc/airoha/airoha,an7581-scu-ssr.yaml     | 106 ++++
 MAINTAINERS                                   |  15 +
 arch/arm64/boot/dts/airoha/en7581.dtsi        |  74 ++-
 drivers/clk/clk-en7523.c                      | 258 ++++----
 drivers/phy/Kconfig                           |   1 +
 drivers/phy/Makefile                          |   3 +-
 drivers/phy/airoha/Kconfig                    |  13 +
 drivers/phy/airoha/Makefile                   |   3 +
 drivers/phy/airoha/phy-airoha-usb.c           | 554 ++++++++++++++++++
 drivers/soc/Kconfig                           |   1 +
 drivers/soc/Makefile                          |   1 +
 drivers/soc/airoha/Kconfig                    |  18 +
 drivers/soc/airoha/Makefile                   |   3 +
 drivers/soc/airoha/airoha-scu-ssr.c           | 195 ++++++
 drivers/usb/host/Kconfig                      |   2 +-
 include/dt-bindings/soc/airoha,scu-ssr.h      |  24 +
 include/linux/soc/airoha/airoha-scu-ssr.h     |  17 +
 include/linux/soc/soc/airoha-scu-ssr.h        |  17 +
 21 files changed, 1355 insertions(+), 137 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/airoha,en7581-scu-sysctl.yaml
 create mode 100644 Documentation/devicetree/bindings/phy/airoha,an7581-usb-phy.yaml
 create mode 100644 Documentation/devicetree/bindings/soc/airoha/airoha,an7581-scu-ssr.yaml
 create mode 100644 drivers/phy/airoha/Kconfig
 create mode 100644 drivers/phy/airoha/Makefile
 create mode 100644 drivers/phy/airoha/phy-airoha-usb.c
 create mode 100644 drivers/soc/airoha/Kconfig
 create mode 100644 drivers/soc/airoha/Makefile
 create mode 100644 drivers/soc/airoha/airoha-scu-ssr.c
 create mode 100644 include/dt-bindings/soc/airoha,scu-ssr.h
 create mode 100644 include/linux/soc/airoha/airoha-scu-ssr.h
 create mode 100644 include/linux/soc/soc/airoha-scu-ssr.h