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From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 25 Jan 2017 12:03:37 +0100
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Subject: Re: [PATCH v14 3/5] tee: add OP-TEE driver
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>,
        Olof Johansson <olof@lixom.net>,
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On Wed, Jan 25, 2017 at 11:02 AM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> On Wed, Jan 25, 2017 at 10:47:45AM +0100, Jens Wiklander wrote:
>> On Tue, Jan 24, 2017 at 01:53:30PM +0100, Jens Wiklander wrote:
>> >
>> > /sys/class/tee/ sounds good, I'll use that. It's more or less what we
>> > also have today.
>>
>> I'm sorry, it seems a struct device has to be used in order to put stuff
>> under /sys/class/tee/. Or am I missing something?
>
> Nope, that is correct.

But that's a different device: this device represents the "class" of
device for the
user space interface, nothing wrong with that. However, we don't need both
the class device and a platform device that is made up by the optee driver
for a firmware feature to represent the same entity that we have the
class device
for.

     Arnd