linux-kernel - Re: [PATCH] usb: cp210x: Added support for GPIO (CP2103/4/5)

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Message-ID: <20120504173356.000fb9da@pyramind.ukuu.org.uk>
Date:	Fri, 4 May 2012 17:33:56 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Alexander Stein <a.stein@...tec-electronic.com>
Cc:	Preston Fick <pffick@...il.com>, gregkh@...uxfoundation.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, preston.fick@...abs.com
Subject: Re: [PATCH] usb: cp210x: Added support for GPIO (CP2103/4/5)

On Fri, 04 May 2012 18:26:58 +0200
Alexander Stein <a.stein@...tec-electronic.com> wrote:

> Am Montag, 30. April 2012, 15:27:17 schrieb Preston Fick:
> > This fix contains several changes that allow toggling of GPIO on CP210x
> > devices that support it. Changes include:
> > * Added in part number support, necessary to see if the connected device
> > supports the GPIO functionality
> > * Added two IOCTLs and ioctl function to allow GET/SET of GPIO
> > * Added in new #defines for partnum support, new USB requests
> > * Changed "Config request types" section to contain more correct definitions
> > for request recipient
> > 
> > Signed-off-by: Preston Fick <preston.fick@...abs.com>
> 
> Do you actually need to create new ioctls? You also could support gpiolib and 
> create a gpiochip for that.

See my follow up posting, and comment on that proposal.
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