linux-kernel - Re: [PATCH v9 03/14] usb: hcd.h: Add OTG to HCD interface

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Message-ID: <Pine.LNX.4.44L0.1606091008210.1697-100000@iolanthe.rowland.org>
Date:	Thu, 9 Jun 2016 10:11:13 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
cc:	Roger Quadros <rogerq@...com>, <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>,
	<jun.li@...escale.com>, <grygorii.strashko@...com>,
	<yoshihiro.shimoda.uh@...esas.com>, <robh@...nel.org>,
	<nsekhar@...com>, <b-liu@...com>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>
Subject: Re: [PATCH v9 03/14] usb: hcd.h: Add OTG to HCD interface

On Thu, 9 Jun 2016, Sergei Shtylyov wrote:

> Hello.
> 
> On 6/9/2016 10:31 AM, Roger Quadros wrote:
> 
> >>>>> The OTG core will use struct otg_hcd_ops to interface
> >>>>> with the HCD controller.
> >>>>
> >>>>    Host controller driver (HCD) controller? Maybe just HC? :-)
> >>>
> >>> OK.
> >>
> >>    OTOH, my googling has shown that HCD may stand for both HC driver and HC device... The host controller device sounds a bit tautological however...
> >
> > Yeah I always meant it to be Host Controller Device :).
> 
>     The question here is more what was meant by the previous Linux USB 
> authors. :-)

I have always used "HCD" to mean Host Controller Driver, and I believe 
that's what other people have done too.

If I want to refer to a Host Controller Device, I would write either
"HC" or "host controller".

Admittedly, this means that struct usb_hcd has a slightly illogical 
name.

Alan Stern