linux-kernel - RE: [PATCH v5 4/5] net: macb: add support for high speed interface

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Date:   Tue, 25 Jun 2019 09:29:03 +0000
From:   Parshuram Raju Thombare <pthombar@...ence.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
CC:     "andrew@...n.ch" <andrew@...n.ch>,
        "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rafal Ciepiela <rafalc@...ence.com>,
        Anil Joy Varughese <aniljoy@...ence.com>,
        Piotr Sroka <piotrs@...ence.com>
Subject: RE: [PATCH v5 4/5] net: macb: add support for high speed interface

>> >>  	switch (state->interface) {
>> >>  	case PHY_INTERFACE_MODE_NA:
>> >> +	case PHY_INTERFACE_MODE_USXGMII:
>> >> +	case PHY_INTERFACE_MODE_10GKR:
>> >> +		if (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) {
>> >> +			phylink_set(mask, 10000baseCR_Full);
>> >> +			phylink_set(mask, 10000baseER_Full);
>> >> +			phylink_set(mask, 10000baseKR_Full);
>> >> +			phylink_set(mask, 10000baseLR_Full);
>> >> +			phylink_set(mask, 10000baseLRM_Full);
>> >> +			phylink_set(mask, 10000baseSR_Full);
>> >> +			phylink_set(mask, 10000baseT_Full);
>> >> +			phylink_set(mask, 5000baseT_Full);
>> >> +			phylink_set(mask, 2500baseX_Full);
>> >> +			phylink_set(mask, 1000baseX_Full);
>> >> +		}
>> >If MACB_CAPS_GIGABIT_MODE_AVAILABLE is not set, are these interface
>> >modes supported by the hardware?  If the PHY interface mode is not
>> >supported, then the returned support mask must be cleared.[]
>> There are some configs which uses this macro to limit data rate to 100M
>> even if hardware support higher rates.
>I'm sorry, this response does not address my statement, maybe I wasn't
>clear enough.  I am asking about the *PHY* interface modes, in
>other words (e.g.) PHY_INTERFACE_MODE_USXGMII.

If interface is not supported by hardware probe returns with error, so net 
device is not registered at all.

Regards,
Parshuram Thombare