RE: [PATCH v2 07/11] usb: musb: add Kconfig options for HOST, GAGDET or DUAL_ROLE modes

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Daniel

> Subject: [PATCH v2 07/11] usb: musb: add Kconfig options for HOST, GAGDET
> or DUAL_ROLE modes
> 
> This makes building the actual object files optional to the selected
> mode, which saves users who know which kind of USB mode support they
> need some binary size.
> 
> Unimplemented functions are stubbed out with static inline functions.
> 
> Signed-off-by: Daniel Mack <zonque@xxxxxxxxx>
> ---
>  drivers/usb/musb/Kconfig       | 29 +++++++++++++++++++++++++++++
>  drivers/usb/musb/Makefile      | 10 ++++++++--
>  drivers/usb/musb/musb_gadget.h | 21 +++++++++++++++++++++
>  drivers/usb/musb/musb_host.h   | 29 +++++++++++++++++++++++++++--
>  4 files changed, 85 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
> index 47442d3..aab1568 100644
> --- a/drivers/usb/musb/Kconfig
> +++ b/drivers/usb/musb/Kconfig
> @@ -28,6 +28,35 @@ config USB_MUSB_HDRC
>  if USB_MUSB_HDRC
> 
>  choice
> +	bool "MUSB Mode Selection"
> +	default USB_MUSB_DUAL_ROLE if (USB && USB_GADGET)
> +	default USB_MUSB_HOST if (USB && !USB_GADGET)
> +	default USB_MUSB_GADGET if (!USB && USB_GADGET)
> +
> +config USB_MUSB_HOST
> +	bool "Host only mode"
> +	depends on USB
> +	help
> +	  Select this when you want to use MUSB in host mode only,
> +	  thereby the gadget feature will be regressed.
> +
> +config USB_MUSB_GADGET
> +	bool "Gadget only mode"
> +	depends on USB_GADGET
> +	help
> +	  Select this when you want to use MUSB in gadget mode only,
> +	  thereby the host feature will be regressed.
> +
> +config USB_MUSB_DUAL_ROLE
> +	bool "Dual Role mode"
> +	depends on (USB && USB_GADGET)
> +	help
> +	  This is the default mode of working of MUSB controller where
> +	  both host and gadget features are enabled.
> +
> +endchoice

How do you cater for multi-instance support? Where one controller to force as host and other as device (similar to am33x beagle configuration).
In general for all combination possible like <host, host> <host, device> <device, host> <dual, dual> etc.

--
Ravi B
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