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Message-ID: <YUoRq1RrOIoiBJ5+@google.com>
Date: Tue, 21 Sep 2021 10:08:59 -0700
From: Matthias Kaehlcke <mka@...omium.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
Mathias Nyman <mathias.nyman@...el.com>,
Felipe Balbi <balbi@...nel.org>
Cc: devicetree@...r.kernel.org, Peter Chen <peter.chen@...nel.org>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
Bastien Nocera <hadess@...ess.net>,
Ravi Chandra Sadineni <ravisadineni@...omium.org>,
Michal Simek <michal.simek@...inx.com>,
Douglas Anderson <dianders@...omium.org>,
Roger Quadros <rogerq@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Stephen Boyd <swboyd@...omium.org>,
Al Cooper <alcooperx@...il.com>,
Al Viro <viro@...iv.linux.org.uk>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Andrew Lunn <andrew@...n.ch>,
Andrey Zhizhikin <andrey.zhizhikin@...ca-geosystems.com>,
Andy Gross <agross@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Aswath Govindraju <a-govindraju@...com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Catalin Marinas <catalin.marinas@....com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Dmitry Osipenko <digetx@...il.com>,
Dong Aisheng <aisheng.dong@....com>,
Enric Balletbo i Serra <enric.balletbo@...labora.com>,
Fabio Estevam <festevam@...il.com>,
Fabrice Gasnier <fabrice.gasnier@...com>,
Florian Fainelli <f.fainelli@...il.com>,
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Lionel Debieve <lionel.debieve@...com>,
Manivannan Sadhasivam <mani@...nel.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Mark Brown <broonie@...nel.org>,
Martin Jücker <martin.juecker@...il.com>,
Nishanth Menon <nm@...com>,
Olivier Moysan <olivier.moysan@...com>,
Pawel Laszczak <pawell@...ence.com>,
Robert Richter <rric@...nel.org>,
Russell King <linux@...linux.org.uk>,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
Shawn Guo <shawnguo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Tony Lindgren <tony@...mide.com>,
Vinod Koul <vkoul@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Will Deacon <will@...nel.org>,
William Cohen <wcohen@...hat.com>,
linux-arm-kernel@...ts.infradead.org,
linux-arm-msm@...r.kernel.org, linux-omap@...r.kernel.org,
linux-samsung-soc@...r.kernel.org,
Łukasz Stelmach <l.stelmach@...sung.com>
Subject: Re: [PATCH v16 0/7] usb: misc: Add onboard_usb_hub driver
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
>
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