[PATCH v4 0/3] RK3588 USB3 host controller support

[Sebastian Reichel]

Hi,

This adds RK3588 USB3 host controller support. The same DT binding
will be used for the two dual-role controllers, which are also DWC3
based, but using a different PHY and don't need the extra UTMI/PIPE
clocks.

The series has been tested with Radxa Rock 5B, which uses the controller
for the upper USB3 port. The patch enabling &combphy2_psu and &usbhost3_0
for this board will be send separately once this series has been merged.

Changes since PATCHv3:
 * https://lore.kernel.org/all/20231009172129.43568-1-sebastian.reichel@xxxxxxxxxxxxx/
 * update binding, simplifying "rockchip,rk3568-dwc3"
 * update binding, no need to specify min/max items for "rockchip,rk3588-dwc3"
 * add driver inline comment, that "utmi" and "pipe" are RK3588 specific

Changes since PATCHv2:
 * https://lore.kernel.org/all/20230720173643.69553-1-sebastian.reichel@xxxxxxxxxxxxx/
 * update binding, so that "utmi" and "pipe" clocks may only be used on RK3588;
   at the same time do not allow "grf_clk" for RK3568, which does not have a GRF
   clock for USB3.

Changes since PATCHv1:
 * https://lore.kernel.org/all/20230719174015.68153-1-sebastian.reichel@xxxxxxxxxxxxx/
 * use same compatible for USB3 host and drd controllers (Krzysztof Kozlowski)
 * do not update reset-names (Krzysztof Kozlowski)
   - note: I dropped reset-names property, since there is only one reset line
     anyways. Binding could stay the same, since the reset-names property is
     optional
 * use "ref_clk", "suspend_clk" and "bus_clk" instead of "ref", "suspend" and "bus",
   so that they are the same as in RK3568 (Krzysztof Kozlowski)
 * rename handle name to "usb_host2_xhci" (Michael Riesch)
 * use RK356x style DWC3 binding instead of DWC3399 style
   - required adding an extra patch, so that the DWC3 core supports enabling
     the UTMI/PIPE clocks

-- Sebastian

Sebastian Reichel (3):
  dt-bindings: usb: add rk3588 compatible to rockchip,dwc3
  usb: dwc3: add optional PHY interface clocks
  arm64: dts: rockchip: rk3588s: Add USB3 host controller

 .../bindings/usb/rockchip,dwc3.yaml           | 60 +++++++++++++++++--
 arch/arm64/boot/dts/rockchip/rk3588s.dtsi     | 21 +++++++
 drivers/usb/dwc3/core.c                       | 28 +++++++++
 drivers/usb/dwc3/core.h                       |  4 ++
 4 files changed, 108 insertions(+), 5 deletions(-)

-- 
2.42.0