netdev - Re: [PATCH RFC] net: phy: add state PERM

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Date:   Mon, 10 Jun 2019 20:51:23 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        David Miller <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH RFC] net: phy: add state PERM_FAIL

> - a PHY driver that requires a firmware should either be loaded prior to
> Linux taking over the PHY, or should be loaded by the PHY driver itself

Hi Florian

Both the Marvell10g and Aquantia PHY need the firmware in their FLASH.
It is a slow operation to perform. And so far, everybody has done it
from user space. I'm not sure we want to hold up the PHY driver probe
for multiple minutes if we where to do this in kernel.

> So the bottom line of my reasoning is that, if we could make this
> marvell10g specific for now, and we generalize that later once we find a
> second candidate, that would seem preferable.

The obvious second candidate is the Aquantia PHY. And i probably have
a board without firmware.

  Andrew