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

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Date:   Fri, 14 Dec 2018 16:26:00 +0100
From:   Marek Vasut <marex@...x.de>
To:     Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Cc:     andrew@...n.ch
Subject: Re: [PATCH] net: phy: tja11xx: Add TJA11xx PHY driver

On 12/13/2018 07:53 PM, Florian Fainelli wrote:
> Le 12/12/18 à 6:01 PM, Marek Vasut a écrit :
>> 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>
>> ---
> 
> [snip]
> 
>> +#define PHY_ID_MASK			0xfffffff0
>> +#define PHY_ID_TJA1100			0x0180dc40
>> +#define PHY_ID_TJA1101			0x0180dd00
>> +
>> +#define MII_ECTRL			17
> 
> Stylistic preference, but for register offsets, using hexadecimal may be
> more natural than using decimal.

This is in-line with the TJA1100 datasheet, where they for whatever
reason use decimal offsets, so I'd like to keep it this way. It saves me
one conversion between bases.

> [snip]
> 
>> +static int tja11xx_soft_reset(struct phy_device *phydev)
>> +{
>> +	int ret;
>> +
>> +	ret = tja11xx_enable_reg_write(phydev);
>> +	if (ret < 0)
>> +		return ret;
>> +
>> +	ret = phy_write(phydev, 0x0, 0xa100);
>> +	return ret < 0 ? ret : 0;
> 
> Can you utilize genphy_soft_reset() here or at least not open code the
> register offset and the bits you write to (use MII_BMCR and
> BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_RESET).

genphy_soft_reset() is fine, changed.

-- 
Best regards,
Marek Vasut