[U-Boot] [PATCH v2 00/18] Improvement for the DWC3 USB generic driver and fixes for the K2 platforms

[Jean-Jacques Hiblot]

The K2 platforms have shown boot issues after switching to the DWC3 generic
driver. Those are due to the fact that the USB domains are not turned off
before booting linux and the phy were not properly initialized. Fixing it
by improving the DWC3-generic driver and handling the USB power domain in
the PHY driver.
At the same time this series introduce a new uclass (UCLASS_NOP) to replace
usage of UCLASS_MISC in the USB wrapper because the MISC class now
automatically binds all the child devices.

Improvements to the DWC3 generic driver are:
- Fix it by switching to UCLASS_NOP
- core: read quirks properties from DT and apply the fixes.
- add a new host driver that uses the DWC3 core (more generic than
  xhci-dwc3). This should enable most platforms to drop their own version
  of the xhci-driver to use the generic one instead.

This series also removes the now unused xhci-zynqmp driver and tries to
better manage the Kconfig options related to DWC3 gadget/host mode
selection.

This has been tested with K2 and DRA7 platforms (host and device modes).
Travis build: https://travis-ci.org/jjhiblot/u-boot/builds/515282720

Changes in v2:
- Add a test for the NOP uclass
- Update commit logs
- Select USB_GADGET_DUALSPEED if USB_DWC3_GADGET is selected

Jean-Jacques Hiblot (18):
  usb: dwc3-generic: remove dm_scan_fdt_dev() from the remove() callback
  usb: host: remove the xhci-zynqmp driver
  dm: Add a No-op uclass
  usb: dwc3: Use UCLASS_NOP instead of UCLASS_MISC for the DWC3 generic
    glue
  usb: dwc3: switch to peripheral mode when exiting
  usb: xhci: move xhci.h to include usb
  usb: dwc3: always use the inlined version of
    dwc3_host_init/dwc3_host_exit
  usb: dwc3-generic: use platdata
  usb: dwc3-generic: factorize code
  usb: dwc3-generic: add a new host driver that uses the dwc3 core
  usb: dwc3-generic: if no max speed is specified in DT, assume super
    speed
  usb: dwc3: Add dwc3_of_parse() to get quirks information from DT
  usb: dwc3: Kconfig: get rid of obsolete mode selection
  ARM: keystone: increase PSC timeout
  ARM: keystone: Do not enable the USB power domains at the board level
  phy: keystone-usb: handle the transition of the USB power domain
  configs: k2g_evm_defconfig: disable XHCI_DWC3 and enable
    KEYSTONE_USB_PHY
  ARM: DTS: keystone: complete the description of the USB PHY devices

 MAINTAINERS                                   |   1 +
 arch/arm/dts/keystone-k2e-evm-u-boot.dtsi     |  32 ++++
 arch/arm/dts/keystone-k2g-evm-u-boot.dtsi     |  28 ++++
 arch/arm/dts/keystone-k2hk-evm-u-boot.dtsi    |  14 ++
 arch/arm/dts/keystone-k2l-evm-u-boot.dtsi     |  18 +++
 .../arm/mach-keystone/include/mach/psc_defs.h |   2 +-
 arch/sandbox/dts/test.dts                     |  12 ++
 board/ti/ks2_evm/board.c                      |  13 --
 configs/avnet_ultra96_rev1_defconfig          |   1 -
 configs/evb-rk3328_defconfig                  |   1 +
 configs/k2g_evm_defconfig                     |   3 +-
 .../xilinx_zynqmp_zc1751_xm015_dc1_defconfig  |   1 -
 .../xilinx_zynqmp_zc1751_xm016_dc2_defconfig  |   1 -
 .../xilinx_zynqmp_zc1751_xm017_dc3_defconfig  |   1 -
 configs/xilinx_zynqmp_zcu100_revC_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu102_rev1_0_defconfig |   1 -
 configs/xilinx_zynqmp_zcu102_revA_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu102_revB_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu104_revA_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu104_revC_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu106_revA_defconfig   |   1 -
 configs/xilinx_zynqmp_zcu111_revA_defconfig   |   1 -
 drivers/core/uclass.c                         |   5 +
 drivers/phy/keystone-usb-phy.c                |  22 +++
 drivers/usb/dwc3/Kconfig                      |  18 +--
 drivers/usb/dwc3/core.c                       |  84 +++++++++-
 drivers/usb/dwc3/core.h                       |   6 +-
 drivers/usb/dwc3/dwc3-generic.c               | 150 ++++++++++++++----
 drivers/usb/host/Kconfig                      |   7 -
 drivers/usb/host/Makefile                     |   1 -
 drivers/usb/host/xhci-dwc3.c                  |   2 +-
 drivers/usb/host/xhci-exynos5.c               |   2 +-
 drivers/usb/host/xhci-fsl.c                   |   2 +-
 drivers/usb/host/xhci-mem.c                   |   2 +-
 drivers/usb/host/xhci-mvebu.c                 |   2 +-
 drivers/usb/host/xhci-omap.c                  |   2 +-
 drivers/usb/host/xhci-pci.c                   |   2 +-
 drivers/usb/host/xhci-rcar.c                  |   2 +-
 drivers/usb/host/xhci-ring.c                  |   2 +-
 drivers/usb/host/xhci-rockchip.c              |   2 +-
 drivers/usb/host/xhci-zynqmp.c                | 146 -----------------
 drivers/usb/host/xhci.c                       |   2 +-
 drivers/usb/phy/omap_usb_phy.c                |   2 +-
 include/dm/uclass-id.h                        |   1 +
 {drivers/usb/host => include/usb}/xhci.h      |   0
 test/dm/Makefile                              |   1 +
 test/dm/nop.c                                 |  73 +++++++++
 47 files changed, 421 insertions(+), 253 deletions(-)
 create mode 100644 arch/arm/dts/keystone-k2l-evm-u-boot.dtsi
 delete mode 100644 drivers/usb/host/xhci-zynqmp.c
 rename {drivers/usb/host => include/usb}/xhci.h (100%)
 create mode 100644 test/dm/nop.c

-- 
2.17.1