linux-kernel - Re: [PATCH v3 06/11] usb: gadget.h: Add OTG to gadget interface

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Message-ID: <20150717003126.GC3609@shlinux2>
Date:	Fri, 17 Jul 2015 08:31:27 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Roger Quadros <rogerq@...com>
CC:	<stern@...land.harvard.edu>, <balbi@...com>,
	<gregkh@...uxfoundation.org>, <dan.j.williams@...el.com>,
	<jun.li@...escale.com>, <mathias.nyman@...ux.intel.com>,
	<tony@...mide.com>, <Joao.Pinto@...opsys.com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: Re: [PATCH v3 06/11] usb: gadget.h: Add OTG to gadget interface

On Wed, Jul 08, 2015 at 01:19:32PM +0300, Roger Quadros wrote:
> The OTG core will use struct otg_gadget_ops to
> start/stop the gadget controller.
> 
> The main purpose of this interface is to avoid directly
> calling usb_gadget_start/stop() from the OTG core as they
> wouldn't be defined in the built-in symbol table if
> CONFIG_USB_GADGET is m.
> 
> Signed-off-by: Roger Quadros <rogerq@...com>
> ---
>  include/linux/usb/gadget.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> index 4f3dfb7..0b4b341 100644
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h
> @@ -887,6 +887,20 @@ struct usb_gadget_driver {
>  };
>  
>  
> +/*-------------------------------------------------------------------------*/
> +
> +/**
> + * struct otg_gadget_ops - Interface between OTG core and gadget
> + *
> + * Provided by the gadget core to allow the OTG core to start/stop the gadget
> + *
> + * @start: function to start the gadget
> + * @stop: function to stop the gadget
> + */
> +struct otg_gadget_ops {
> +	int (*start)(struct usb_gadget *gadget);
> +	int (*stop)(struct usb_gadget *gadget);
> +};
>  
>  /*-------------------------------------------------------------------------*/
>  
> -- 
> 2.1.4
> 

Reviewed-by: Peter Chen <peter.chen@...escale.com>

-- 

Best Regards,
Peter Chen
--
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