netdev - Re: [PATCH net-next 1/4] net: phy: marvell10g: Support firmware loading on 88X3310

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Date: Fri, 15 Dec 2023 14:34:00 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>
Cc: Tobias Waldekranz <tobias@...dekranz.com>, davem@...emloft.net,
	kuba@...nel.org, kabel@...nel.org, hkallweit1@...il.com,
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 1/4] net: phy: marvell10g: Support firmware
 loading on 88X3310

On Fri, Dec 15, 2023 at 03:30:09PM +0100, Andrew Lunn wrote:
> On Thu, Dec 14, 2023 at 09:14:39PM +0100, Tobias Waldekranz wrote:
> > When probing, if a device is waiting for firmware to be loaded into
> > its RAM, ask userspace for the binary and load it over XMDIO.
> 
> Does a device without firmware have valid ID registers?

Yes it does - remember one of the ZII dev boards had a 3310 without
firmware, and that can be successfully probed by the driver, which
is key to my userspace tooling being able to access the PHY (since
userspace can only access devices on MDIO buses that are bound to
a netdev.)

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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