On Tue, 2017-08-15 at 00:45 +0200, Martin Blumenstingl wrote:
> Many SoC platforms have separate devices for the USB PHY which are
> registered through the generic PHY framework. These PHYs have to be
> enabled to make the USB controller actually work. They also have to be
> disabled again on shutdown/suspend.
>
> Currently (at least) the following HCI platform drivers are using custom
> code to obtain all PHYs via devicetree for the roothub/controller and
> disable/enable them when required:
> - ehci-platform.c has ehci_platform_power_{on,off}
> - xhci-mtk.c has xhci_mtk_phy_{init,exit,power_on,power_off}
> - ohci-platform.c has ohci_platform_power_{on,off}
>
> These drivers are not using the generic devicetree USB device bindings
> yet which were only introduced recently (documentation is available in
> devicetree/bindings/usb/usb-device.txt).
> With this new driver the usb2-phy and usb3-phy can be specified directly
> in the child-node of the corresponding port of the roothub via
> devicetree. This can be extended by not just parsing PHYs (some of the
> other drivers listed above are for example also parsing a list of clocks
> as well) when required.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
> ---
> drivers/usb/host/Kconfig | 3 +
> drivers/usb/host/Makefile | 2 +
> drivers/usb/host/platform-roothub.c | 180 ++++++++++++++++++++++++++++++++++++
> drivers/usb/host/platform-roothub.h | 12 +++
> 4 files changed, 197 insertions(+)
> create mode 100644 drivers/usb/host/platform-roothub.c
> create mode 100644 drivers/usb/host/platform-roothub.h
>
Tested-by: Chunfeng Yun<chunfeng.yun@xxxxxxxxxxxx>
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index fa5692dec832..b8b05c786b2a 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -805,6 +805,9 @@ config USB_HCD_SSB
>
> If unsure, say N.
>
> +config USB_PLATFORM_ROOTHUB
> + bool
> +
> config USB_HCD_TEST_MODE
> bool "HCD test mode support"
> ---help---
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index cf2691fffcc0..dc817f82d632 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -29,6 +29,8 @@ obj-$(CONFIG_USB_WHCI_HCD) += whci/
>
> obj-$(CONFIG_USB_PCI) += pci-quirks.o
>
> +obj-$(CONFIG_USB_PLATFORM_ROOTHUB) += platform-roothub.o
> +
> obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
> obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
> obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o
> diff --git a/drivers/usb/host/platform-roothub.c b/drivers/usb/host/platform-roothub.c
> new file mode 100644
> index 000000000000..70d2d97aa8b2
> --- /dev/null
> +++ b/drivers/usb/host/platform-roothub.c
> @@ -0,0 +1,180 @@
[...]
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