linux-kernel - Re: [PATCH net-next v3 03/11] net: phy: replace is_c45 with phy_accces

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Message-ID: <26d16266-83e2-4494-8c29-ca4879be28d4@lunn.ch>
Date:   Wed, 19 Jul 2023 01:30:25 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
Cc:     Michael Walle <mwalle@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Marek Behún <kabel@...nel.org>,
        Xu Liang <lxu@...linear.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Simon Horman <simon.horman@...igine.com>
Subject: Re: [PATCH net-next v3 03/11] net: phy: replace is_c45 with
 phy_accces_mode

> Why would it be two drivers?

I'm assuming there is no C22 over C45. So phy_read() is not going to
work. I'm also assuming the current driver is using the C22 register
space.

So either the driver needs re-writing to use only the C45 register
space, maybe using C45 over C22, or it needs a second parallel driver
using just the C45 register space when only C45 bus transfers are
available.

	Andrew