linux-kernel - Re: [PATCH v1 3/5] staging: fieldbus core: add support for device configuration

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Message-ID: <20190930140621.GB2280096@kroah.com>
Date:   Mon, 30 Sep 2019 16:06:21 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Sven Van Asbroeck <thesven73@...il.com>
Cc:     Andreas Färber <afaerber@...e.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Enrico Weigelt <lkml@...ux.net>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        jan.kiszka@...mens.com, Frank Iwanitz <friw@...-networks.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v1 3/5] staging: fieldbus core: add support for device
 configuration

On Wed, Sep 18, 2019 at 02:35:50PM -0400, Sven Van Asbroeck wrote:
> Support device configuration by adding
> 
> - an in-kernel driver config API, and
> - a configfs-based userspace config ABI
> 
> In short, drivers pick a subset from a set of standardized config
> properties. This is exposed by the fieldbus core as configfs files.
> Userspace may then configure the device by writing to these configfs
> files, prior to enabling the device.

Why is a new way of doing configuration needed here?  What does this
provide that the current code doesn't already do?

And have you looked at the recent configfs fixes to make sure this code
still works with them?  I can't test this so rebasing this on 5.4-rc1
would be good for you to do first.

thanks,

greg k-h