linux-kernel - Re: [PATCH] net: fec: generate warning when using deprecated phy reset

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Message-ID: <20190718195949.GM25635@lunn.ch>
Date:   Thu, 18 Jul 2019 21:59:49 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Sven Van Asbroeck <thesven73@...il.com>
Cc:     Fabio Estevam <festevam@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Fugang Duan <fugang.duan@....com>,
        "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: fec: generate warning when using deprecated phy
 reset

> What I keep forgetting in my little arm-imx6 world, is that devicetrees
> aren't in-kernel apis, but that they have out-of-kernel
> dependencies. It makes more sense to to see them as userspace
> apis, albeit directed at firmware/bootloaders, right?

It is an ongoing debate, but generally they should be considered ABI
and follow the ABI rules about not breaking backwards compatibility.

However, there is also an argument that something like a NAS box
running Debian is going to use the DT blob which came with the kernel,
so deprecated DT properties and the code to support them could be
removed after a period of time.

	Andrew