Hi Shimoda-san,
On Wed, Apr 18, 2018 at 10:10 AM, Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> This patch adds role switch support for R-Car SoCs. Some R-Car SoCs
> (e.g. R-Car H3) have USB 3.0 dual-role device controller which has
> the USB 3.0 xHCI host and Renesas USB 3.0 peripheral.
>
> Unfortunately, the mode change register contains the USB 3.0 peripheral
> controller side only. So, the USB 3.0 peripheral driver (renesas_usb3)
> manages this register. However, in peripheral mode, the host should
> stop. Also the host hardware needs to reinitialize its own registers
> when the mode changes from peripheral to host mode. Otherwise,
> the host cannot work correctly (e.g. detect a device as high-speed).
>
> To achieve this by a driver, this role switch driver manages
> the mode change register and attach/release the xhci-plat driver.
> The renesas_usb3 udc driver should call devm_of_platform_populate()
> to probe this driver.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Thanks for your patch!
> --- a/drivers/usb/roles/Kconfig
> +++ b/drivers/usb/roles/Kconfig
> @@ -11,4 +11,16 @@ config USB_ROLES_INTEL_XHCI
> To compile the driver as a module, choose M here: the module will
> be called intel-xhci-usb-role-switch.
>
> +config USB_ROLES_RCAR_USB3
> + tristate "Renesas R-Car USB3.0 Role Switch"
> + depends on ARCH_RENESAS && OF
ARCH_RENESAS implies OF.
Perhaps you intended:
depends on OF
depends on ARCH_RENESAS || COMPILE_TEST
?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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