On Thu, 8 May 2014, Arnd Bergmann wrote:
> The PHY setup code of the TI DaVinci DA8xx OHCI controller
> uses ad-hoc register access using a pointer that is meant to
> be used only by the DaVinci platform implementation and that
> is intentionally not exported to loadable modules. This results
> in a link error on configurations that use a modular OHCI
> code on this platform.
>
> While the proper solution for this problem would be to
> implement a real PHY driver shared by ohci-da8xx and musb-da8xx,
> this patch for now just works around the build error by
> only allowing the ohci-da8xx code to be built-in.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> ---
> drivers/usb/host/Kconfig | 10 ++++++++++
> drivers/usb/host/ohci-hcd.c | 2 +-
> 2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index e229a47..3af10b7 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -417,6 +417,16 @@ config USB_OHCI_HCD_OMAP3
> Enables support for the on-chip OHCI controller on
> OMAP3 and later chips.
>
> +config USB_OHCI_HCD_DAVINCI
> + bool "OHCI support for TI DaVinci DA8xx"
> + depends on ARCH_DAVINCI_DA8XX
> + depends on USB_OHCI_HCD=y
> + default y
> + help
> + Enables support for the DaVinci DA8xx integrated OHCI
> + controller. This driver cannot currently be a loadable
> + module because it lacks a proper PHY abstraction.
> +
> config USB_OHCI_ATH79
> bool "USB OHCI support for the Atheros AR71XX/AR7240 SoCs (DEPRECATED)"
> depends on (SOC_AR71XX || SOC_AR724X)
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index 3586460..f98d03f 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -1178,7 +1178,7 @@ MODULE_LICENSE ("GPL");
> #define SA1111_DRIVER ohci_hcd_sa1111_driver
> #endif
>
> -#ifdef CONFIG_ARCH_DAVINCI_DA8XX
> +#ifdef CONFIG_USB_OHCI_HCD_DAVINCI
> #include "ohci-da8xx.c"
> #define DAVINCI_PLATFORM_DRIVER ohci_hcd_da8xx_driver
> #endif
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
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