linux-kernel - Re: [net-next: PATCH 09/12] Documentation: ACPI: DSD: introduce DSA description

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Message-ID: <YrL4EQxM1c+p9EUY@smile.fi.intel.com>
Date:   Wed, 22 Jun 2022 14:08:01 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Marcin Wojtas <mw@...ihalf.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, vivien.didelot@...il.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, pabeni@...hat.com,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Grzegorz Bernacki <gjb@...ihalf.com>,
        Grzegorz Jaszczyk <jaz@...ihalf.com>,
        Tomasz Nowicki <tn@...ihalf.com>,
        Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@....com>,
        upstream@...ihalf.com
Subject: Re: [net-next: PATCH 09/12] Documentation: ACPI: DSD: introduce DSA
 description

On Wed, Jun 22, 2022 at 12:37:46PM +0200, Andrew Lunn wrote:
> On Wed, Jun 22, 2022 at 12:22:23PM +0200, Marcin Wojtas wrote:

...

> MRVL0100 is pretty meaningless, but marvell,orion-mdio gives you a
> much better idea what the device is. That i would say is the key of
> the problem here. Without knowing what MRVL0100 means, it is hard to
> guess the rest.

As I pointed out they may use _DDN which will be part of the DSDT independenly
of the ACPICA version (`iasl` may add comments on the devices it knows) or any
other ACPI tools. The cons of this is the unused bulk in the ACPI tables,
meaning wasted space in firmware.

-- 
With Best Regards,
Andy Shevchenko