netdev - Re: [PATCH 12/14] net: axienet: Autodetect 64-bit DMA capability

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Date:   Fri, 10 Jan 2020 15:08:52 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Andre Przywara <andre.przywara@....com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>,
        Michal Simek <michal.simek@...inx.com>,
        Robert Hancock <hancock@...systems.ca>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/14] net: axienet: Autodetect 64-bit DMA capability

> To autodetect this configuration, at probe time we write all 1's to such
> an MSB register, and see if any bits stick.

So there is no register you can read containing the IP version?

   Andrew