netdev - Re: [PATCH V2] net: phy: tja11xx: Add TJA11xx PHY driver

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Date:   Sat, 15 Dec 2018 21:01:26 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Marek Vasut <marex@...x.de>, netdev@...r.kernel.org,
        f.fainelli@...il.com
Subject: Re: [PATCH V2] net: phy: tja11xx: Add TJA11xx PHY driver

On 15.12.2018 20:59, Andrew Lunn wrote:
>>>> +static int tja11xx_config_init(struct phy_device *phydev)
>>>> +{
>>>> +	int ret;
>>>> +
>>>> +	ret = tja11xx_enable_reg_write(phydev);
>>>> +	if (ret)
>>>> +		return ret;
>>>> +
>>>> +	phydev->irq = PHY_POLL;
>>>> +	phydev->autoneg = AUTONEG_DISABLE;
>>>> +	phydev->speed = SPEED_100;
>>
>> One more thing: In the data sheet there are SPEED_SELECT bits allowing
>> to set also 10MBit and 1GBit mode. Don't you want to support this?
> 
> Hi Heiner
> 
> Did you read footnote 2?
> 
> Speed Select. 00: 10 Mbits; 01: 100Mbit/s, 10: 1000Mbit/s, 11:
> reserved. a write access value other than 01 is ignored.
> 
Uh, missed that. Thanks for the hint.

> So the bits are there, but not really used. It can only do 100Mbit/s.
> 
>    Andrew
> 
>