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Message-ID: <20170524102821.GB9302@wunner.de>
Date:   Wed, 24 May 2017 12:28:21 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <yehezkel.bernat@...el.com>,
        Amir Levy <amir.jer.levy@...el.com>,
        Andy Lutomirski <luto@...nel.org>, Mario.Limonciello@...l.com,
        Jared.Dominguez@...l.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/24] thunderbolt: Introduce thunderbolt bus and
 connection manager

On Thu, May 18, 2017 at 05:38:56PM +0300, Mika Westerberg wrote:
> Thunderbolt fabric consists of one or more switches. This fabric is
> called domain and it is controlled by an entity called connection
> manager. The connection manager can be either internal (driven by a
> firmware running on the host controller) or external (software driver).
> This driver currently implements support for the latter.
> 
> In order to manage switches and their properties more easily we model
> this domain structure as a Linux bus. Each host controller adds a domain
> device to this bus, and these devices are named as domainN where N
> stands for index or id of the current domain.

What is the rationale for using a bus?  Do you intend to attach a driver
to each domain and/or switch?  Unless you do, a class might be more
appropriate.

Thanks,

Lukas

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