netdev - Re: [PATCH V4] net: phy: tja11xx: Add TJA11xx PHY driver

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Date:   Fri, 4 Jan 2019 20:27:50 +0100
From:   Marek Vasut <marex@...x.de>
To:     Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>, Guenter Roeck <linux@...ck-us.net>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH V4] net: phy: tja11xx: Add TJA11xx PHY driver

On 1/4/19 5:24 PM, Florian Fainelli wrote:
> 
> 
> On January 3, 2019 6:15:47 PM PST, Marek Vasut <marex@...x.de> wrote:
>> Add driver for the NXP TJA1100 and TJA1101 PHYs. These PHYs are special
>> BroadRReach 100BaseT1 PHYs used in automotive.
>>
>> Signed-off-by: Marek Vasut <marex@...x.de>
>> Cc: Andrew Lunn <andrew@...n.ch>
>> Cc: Florian Fainelli <f.fainelli@...il.com>
>> Cc: Guenter Roeck <linux@...ck-us.net>
>> Cc: Heiner Kallweit <hkallweit1@...il.com>
>> Cc: Jean Delvare <jdelvare@...e.com>
>> Cc: linux-hwmon@...r.kernel.org
>> ---
>> V2: - Use phy_modify(), phy_{set,clear}_bits()
>>    - Drop enable argument of tja11xx_enable_link_control()
>>    - Use PHY_BASIC_T1_FEATURES and dont modify supported/advertised
>>      features in config_init callback
>>    - Use genphy_soft_reset() instead of opencoding the reset sequence.
>>    - Drop the aneg parts, since the PHY datasheet claims it does not
>>      support aneg
>> V3: - Replace clr with mask
>>    - Add hwmon support
>>    - Check commstat in tja11xx_read_status() only if link is up
>>    - Use PHY_ID_MATCH_MODEL()
>> V4: - Use correct bit in tja11xx_hwmon_read() hwmon_temp_crit_alarm
>>    - Use ENOMEM if devm_kstrdup() fails
>>    - Check $type in tja11xx_hwmon_read() in addition to $attr
>> ---
> 
> [Snip]
> 
>> +	ret = tja11xx_enable_reg_write(phydev);
>> +	if (ret)
>> +		return ret;
>> +
>> +	phydev->irq = PHY_POLL;
> 
> The PHY driver should not be imposing that, leave it up to the platform configuration to set that.

OK

>> +	phydev->autoneg = AUTONEG_DISABLE;
>> +	phydev->speed = SPEED_100;
>> +	phydev->duplex = DUPLEX_FULL;
>> +	phydev->pause = 0;
>> +	phydev->asym_pause = 0;
> 
> Are any of those necessary if you set basic T1 features?

autoneg, speed and duplex need to be set, the rest can be left as
defaults. Shall I drop those (pause, asym_pause) ?

> Everything else looks good to me. Thanks!
> 


-- 
Best regards,
Marek Vasut