netdev - Re: [PATCH net-next] net: dsa: mv88e6xxx: Correct cmode to PHY_INTERFACE

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Date:   Tue, 11 Apr 2023 06:00:48 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vladimir Oltean <vladimir.oltean@....com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: Correct cmode to
 PHY_INTERFACE_



On 4/11/2023 5:48 AM, Andrew Lunn wrote:
>> On 4/11/2023 4:38 AM, Vladimir Oltean wrote:
>>> On Tue, Apr 11, 2023 at 04:35:41AM +0200, Andrew Lunn wrote:
>>>> The switch can either take the MAC or the PHY role in an MII or RMII
>>>> link. There are distinct PHY_INTERFACE_ macros for these two roles.
>>>> Correct the mapping so that the `REV` version is used for the PHY
>>>> role.
> 
>>>>    static const u8 mv88e6xxx_phy_interface_modes[] = {
>>>> -	[MV88E6XXX_PORT_STS_CMODE_MII_PHY]	= PHY_INTERFACE_MODE_MII,
>>>> +	[MV88E6XXX_PORT_STS_CMODE_MII_PHY]	= PHY_INTERFACE_MODE_REVMII,
>>
>> Is this hunk correct?
> 
> Hi Florian
> 
> I don't see why it is wrong, but you can be blind to bugs in your own
> code. What do you think is wrong?

I was not thinking it was wrong, just curious about the meaning of a 
CMODE value suffixed with _PHY, though it seems clear(er) now that this 
means the port is configured as a PHY and provides PHY signals to the 
MAC it connects to.

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

PS: you can be blind without enough coffee as well :p
-- 
Florian