linux-kernel - Re: [PATCH v10 08/14] usb: otg: add OTG/dual-role core

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Message-ID: <20160612112105.GB32615@shlinux2>
Date:	Sun, 12 Jun 2016 19:21:05 +0800
From:	Peter Chen <hzpeterchen@...il.com>
To:	Roger Quadros <rogerq@...com>
Cc:	peter.chen@...escale.com, balbi@...nel.org, tony@...mide.com,
	gregkh@...uxfoundation.org, dan.j.williams@...el.com,
	mathias.nyman@...ux.intel.com, Joao.Pinto@...opsys.com,
	sergei.shtylyov@...entembedded.com, jun.li@...escale.com,
	grygorii.strashko@...com, yoshihiro.shimoda.uh@...esas.com,
	robh@...nel.org, nsekhar@...com, b-liu@...com, joe@...ches.com,
	linux-usb@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v10 08/14] usb: otg: add OTG/dual-role core

On Fri, Jun 10, 2016 at 04:07:17PM +0300, Roger Quadros wrote:
> index dca7856..03f7204 100644
> --- a/drivers/usb/Makefile
> +++ b/drivers/usb/Makefile
> @@ -59,5 +59,6 @@ obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs/
>  obj-$(CONFIG_USB_GADGET)	+= gadget/
>  
>  obj-$(CONFIG_USB_COMMON)	+= common/
> +obj-$(CONFIG_USB_OTG_CORE)	+= common/

I don't think you need to make above change, why you do it?

> +
> +/**
> + * usb_otg_get_data() - get usb_otg data structa

%s/structa/structure

> +
> +/**
> + * usb_otg_kick_fsm() - Kick the OTG state machine
> + * @otg_dev:	OTG controller device
> + *
> + * Used by USB host/gadget stack to sync OTG related
> + * events to the OTG state machine.
> + * e.g. change in host_bus->b_hnp_enable, gadget->b_hnp_enable
> + *
> + * Return: 0 on success, error value otherwise.
> + */
> +int usb_otg_kick_fsm(struct device *otg_dev)
> +{
> +	struct usb_otg *otg;
> +
> +	mutex_lock(&otg_list_mutex);
> +	otg = usb_otg_get_data(otg_dev);
> +	mutex_unlock(&otg_list_mutex);
> +	if (!otg) {
> +		dev_dbg(otg_dev, "otg: %s: invalid otg device\n",
> +			__func__);
> +		return -ENODEV;
> +	}
> +
> +	usb_otg_sync_inputs(otg);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(usb_otg_kick_fsm);

Do you have any users for this API? If no, please delete it in this
version.

> +
> +/**
> + * usb_otg_register_hcd() - Register the host controller to OTG core
> + * @hcd:	host controller
> + * @irqnum:	interrupt number
> + * @irqflags:	interrupt flags
> + * @ops:	HCD ops to interface with the HCD
> + *
> + * This is used by the USB Host stack to register the host controller
> + * to the OTG core. Host controller must not be started by the
> + * caller as it is left upto the OTG state machine to do so.

%s/upto/up to

> +
> +/**
> + * usb_otg_register_gadget() - Register the gadget controller to OTG core
> + * @gadget:	gadget controller instance
> + * @ops:	gadget interface ops
> + *
> + * This is used by the USB gadget stack to register the gadget controller
> + * to the OTG core. Gadget controller must not be started by the
> + * caller as it is left upto the OTG state machine to do so.
> + *

%s/upto/up to

-- 

Best Regards,
Peter Chen