linux-kernel - Re: [PATCH net v2] net: ti: icssg-prueth: Fix r30 CMDs bitmasks

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Message-ID: <a322d1c2-d79a-4b55-92f6-2b98c1f2266e@lunn.ch>
Date:   Mon, 16 Oct 2023 20:39:19 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     "Anwar, Md Danish" <a0501179@...com>
Cc:     MD Danish Anwar <danishanwar@...com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org, srk@...com,
        Vignesh Raghavendra <vigneshr@...com>, r-gunasekaran@...com,
        Roger Quadros <rogerq@...nel.org>
Subject: Re: [PATCH net v2] net: ti: icssg-prueth: Fix r30 CMDs bitmasks

> > How many different versions of REL.PRU-ICSS-ETHERNET-SWITCH have been
> > released? They don't appear to be part of linux-firmware.git :-(
> > 
> 
> The firmwares are currently not posted to linux-firmware.git. They are
> maintained internally as of now. Different version of firmware is
> released for every SDK release (3-4 times a year)

Clearly, mainline works differently. Ideally you do want to get the
firmware in linux-firmware.git. The kernel and firmware are then more
likely to by upgraded at the same time. However, you should not assume
so. Maybe in mainline you can then support the last 4 firmware
versions, and issue an error if a version older than that is found.

However, until the firmware is easily available via linux-firmware,
you probably should be backwards compatible for a longer period.

	Andrew