linux-kernel - Re: [PATCH 0/5] arm: dts: linksys: rename codename to model

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Date:   Wed, 8 Apr 2020 00:46:15 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Paul Spooren <mail@...rcar.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        jason@...edaemon.net, gregory.clement@...tlin.com,
        sebastian.hesselbarth@...il.com, daniel@...rotopia.org,
        freifunk@...ianschmutzler.de
Subject: Re: [PATCH 0/5] arm: dts: linksys: rename codename to model

On Tue, Apr 07, 2020 at 11:08:10AM -1000, Paul Spooren wrote:
> Linksys chose to use codenames for a few of their devices and sell their
> them under an entirely different name.
> 
> codename  model name
> rango  -> wrt3200acm
> mamba  -> wrt1900ac
> cobra  -> wrt1900ac-v2
> caiman -> wrt1200ac
> shelby -> wrt1900acs

Hi Paul

There was quite a bit of discussion about this when the first board
was added. If i remember correctly, it was Mamba.

Imre Kaloz, <kaloz@...nwrt.org> was the one arguing for
the name armada-xp-linksys-mamba.dts.

So it seems that openwrt.org has now come full circle?

> This introduces some extra loops in OpenWrt, a distribution specialized
> on embedded Internet facing devices, as both codename and model name are
> used within the build system. The double naming requires developers to
> keep track of that mapping and introduces inconsistencies:
> 
> To build a specific device in OpenWrt profiles are used, named after the
> the compatible string for targets using device tree (similar to how .dts
> files are named in the linux source tree). However, the first item of
> the DT `compatible` list in this case is `linksys,rango`, which is
> inconsistent with the model name and not what common users would expect.
> 
> Such double naming complicates currently the automatic search for
> firmware upgrade as the build system does not support such mapping.
> Ideally the first item of the DT `compatible` list would contain a
> string suitable to be used as a filename recognizable by normal users to
> belong to that device.

> With this patch set the Linksys device tree files are moved from
> containing the codename to contain a sanitized model name and also use
> it as first entry of the DT `compatible` list.

I've no problems adding another compatible to the list. But i don't
like the idea of renaming the files. The file names could be
considered ABI! What installers/bootloaders are you going to break by
renaming them?

	   Andrew