Hi Greg, are there any actions pending or can this land in usb-testing? I confirmed that this series can be rebased on top of v5.15-rc2 without conflicts. Thanks m. On Fri, Aug 13, 2021 at 12:52:21PM -0700, Matthias Kaehlcke wrote: > This series adds: > - the onboard_usb_hub_driver > - glue in the xhci-plat driver to create and destroy the > onboard_usb_hub platform devices if needed > - a device tree binding for the Realtek RTS5411 USB hub controller > - device tree changes that add RTS5411 entries for the QCA SC7180 > based boards trogdor and lazor > - a couple of stubs for platform device functions to avoid > unresolved symbols with certain kernel configs > > The main issue the driver addresses is that a USB hub needs to be > powered before it can be discovered. For discrete onboard hubs (an > example for such a hub is the Realtek RTS5411) this is often solved > by supplying the hub with an 'always-on' regulator, which is kind > of a hack. Some onboard hubs may require further initialization > steps, like changing the state of a GPIO or enabling a clock, which > requires even more hacks. This driver creates a platform device > representing the hub which performs the necessary initialization. > Currently it only supports switching on a single regulator, support > for multiple regulators or other actions can be added as needed. > Different initialization sequences can be supported based on the > compatible string. > > Besides performing the initialization the driver can be configured > to power the hub off during system suspend. This can help to extend > battery life on battery powered devices which have no requirements > to keep the hub powered during suspend. The driver can also be > configured to leave the hub powered when a wakeup capable USB device > is connected when suspending, and power it off otherwise. > > Changes in v16: > - added patch 'ARM: configs: Explicitly enable USB_XHCI_PLATFORM > where needed' to keep arm32 defconfigs effectively unchanged > > Changes in v15: > - adjusted dependencies of USB_DWC3_CORE to make sure it can only > be enabled when at least one of USB_DWC3_HOST, USB_DWC3_GADGET > or USB_DWC3_DUAL_ROLE is selectable > > Changes in v14: > - rebased on top of v5.14-rc1 > - dropped DT binding patch which landed in v5.13 > > Changes in v13: > - added patch "usb: Specify dependency on USB_XHCI_PLATFORM with > 'depends on'" to the series to avoid Kconfig conflicts > - added patch "arm64: defconfig: Explicitly enable USB_XHCI_PLATFORM" > to the series to keep effective defconfig unchanged > > Changes in v12: > - onboard_hub driver: use IS_ENABLED(CONFIG_USB_ONBOARD_HUB_MODULE) > in onboard_hub.h to also check for the driver built as module > - onboard_hub_driver: include onboard_hub.h again to make sure there > are prototype declarations for the public functions > > Changes in v11: > - support multiple onboard hubs connected to the same parent > - don't include ‘onboard_hub.h’ from the onboard hub driver > > Changes in v10: > - always use of_is_onboard_usb_hub() stub unless ONBOARD_USB_HUB=y/m > - keep 'regulator-boot-on' property for pp3300_hub > > Changes in v9: > - added dependency on ONBOARD_USB_HUB (or !!ONBOARD_USB_HUB) to > USB_PLATFORM_XHCI > > Changes in v7: > - updated DT binding > - series rebased on qcom/arm64-for-5.13 > > Changes in v6: > - updated summary > > Changes in v5: > - cover letter added > > Matthias Kaehlcke (7): > usb: misc: Add onboard_usb_hub driver > of/platform: Add stubs for of_platform_device_create/destroy() > ARM: configs: Explicitly enable USB_XHCI_PLATFORM where needed > arm64: defconfig: Explicitly enable USB_XHCI_PLATFORM > usb: Specify dependencies on USB_XHCI_PLATFORM with 'depends on' > usb: host: xhci-plat: Create platform device for onboard hubs in > probe() > arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub > > .../sysfs-bus-platform-onboard-usb-hub | 8 + > MAINTAINERS | 7 + > arch/arm/configs/exynos_defconfig | 1 + > arch/arm/configs/keystone_defconfig | 1 + > arch/arm/configs/multi_v7_defconfig | 1 + > arch/arm/configs/mvebu_v7_defconfig | 1 + > arch/arm/configs/omap2plus_defconfig | 1 + > arch/arm/configs/pxa_defconfig | 1 + > .../boot/dts/qcom/sc7180-trogdor-lazor-r0.dts | 19 +- > .../boot/dts/qcom/sc7180-trogdor-lazor-r1.dts | 12 +- > .../arm64/boot/dts/qcom/sc7180-trogdor-r1.dts | 19 +- > arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 19 +- > arch/arm64/configs/defconfig | 1 + > drivers/usb/cdns3/Kconfig | 2 +- > drivers/usb/dwc3/Kconfig | 5 +- > drivers/usb/host/Kconfig | 5 +- > drivers/usb/host/xhci-plat.c | 6 + > drivers/usb/host/xhci.h | 2 + > drivers/usb/misc/Kconfig | 17 + > drivers/usb/misc/Makefile | 1 + > drivers/usb/misc/onboard_usb_hub.c | 497 ++++++++++++++++++ > include/linux/of_platform.h | 22 +- > include/linux/usb/onboard_hub.h | 18 + > 23 files changed, 627 insertions(+), 39 deletions(-) > create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub > create mode 100644 drivers/usb/misc/onboard_usb_hub.c > create mode 100644 include/linux/usb/onboard_hub.h > > -- > 2.33.0.rc1.237.g0d66db33f3-goog >
