linux-kernel - Re: [RFC/PATCH 1/2] usb: gadget: re-introduce gadget_is

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Date:	Tue, 29 Oct 2013 08:34:00 -0500
From:	Felipe Balbi <balbi@...com>
To:	David Cohen <david.a.cohen@...ux.intel.com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC/PATCH 1/2] usb: gadget: re-introduce gadget_is_dwc3()

Hi,

On Mon, Oct 28, 2013 at 06:12:59PM -0700, David Cohen wrote:
> gadget_is_dwc3() is necessary to check whether we are running on
> Desineware USB3 DRD controller.
> 
> This macro was previously removed by commit
> ed9cbda63d45638b69ce62412e3a3c7b00644835 due to it wasn't needed
> anymore. We're adding it again as things have changed.
> 
> Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
> ---
>  drivers/usb/gadget/gadget_chips.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
> index bcd04bc..3186a5e 100644
> --- a/drivers/usb/gadget/gadget_chips.h
> +++ b/drivers/usb/gadget/gadget_chips.h
> @@ -28,6 +28,7 @@
>   * do that for you.
>   */
>  #define gadget_is_at91(g)		(!strcmp("at91_udc", (g)->name))
> +#define gadget_is_dwc3(g)		(!strcmp("dwc3-gadget", (g)->name))

NAK, we want to get rid of all of them, in fact. gadget drivers
shouldn't have to know which controller they're running on, they need to
know about quirks and features the controller supports.

-- 
balbi

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