netdev - Re: [PATCH v2] net: phy: add Maxlinear GPY115/21x/24x driver

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Date:   Fri, 4 Jun 2021 12:52:02 +0000
From:   Liang Xu <lxu@...linear.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "vee.khee.wong@...ux.intel.com" <vee.khee.wong@...ux.intel.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        Hauke Mehrtens <hmehrtens@...linear.com>,
        Thomas Mohren <tmohren@...linear.com>
Subject: Re: [PATCH v2] net: phy: add Maxlinear GPY115/21x/24x driver

On 4/6/2021 8:15 pm, Andrew Lunn wrote:
> This email was sent from outside of MaxLinear.
>
>
>> +config MXL_GPHY
>> +     tristate "Maxlinear PHYs"
>> +     help
>> +       Support for the Maxlinear GPY115, GPY211, GPY212, GPY215,
>> +       GPY241, GPY245 PHYs.
> Do these PHYs have unique IDs in register 2 and 3? What is the format
> of these IDs?
>
> The OUI is fixed. But often the rest is split into two. The higher
> part indicates the product, and the lower part is the revision. We
> then have a struct phy_driver for each product, and the mask is used
> to match on all the revisions of the product.
>
>       Andrew
>
Register 2, Register 3 bit 10~15 - OUI

Register 3 bit 4~9 - product number

Register 3 bit 0~3 - revision number

These PHYs have same ID in register 2 and 3.