linux-kernel - Re: [PATCH] net: netsec: Ignore 'phy-mode' on SynQuacer in DT mode

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Date:   Fri, 28 Jul 2023 11:02:24 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc:     Ard Biesheuvel <ardb@...nel.org>, Mark Brown <broonie@...nel.org>,
        Masahisa Kojima <masahisa.kojima@...aro.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: netsec: Ignore 'phy-mode' on SynQuacer in DT mode

> U-Boot does support the network interface (sni-netsec.c) but I'll have to
> check what that code does wrt to the PHY config.  Since the interface works
> I am assuming some config is done properly. 

It might only be done if TFTP boot is used etc. If booting from FLASH,
maybe the network is not initialised, leaving the PHY in its power on
default state.

In general, it is much better for Linux not to assume the bootloader
has configured the hardware, since developers have a choice of boot
loaders.

	Andrew