linux-kernel - Re: [PATCH 1/3] net: phy: nxp-c45-tja11xx: add support for TJA1121

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Message-ID: <9de3e4c3-9f9e-41c0-9e2a-19e95e859c98@oss.nxp.com>
Date: Thu, 27 Feb 2025 18:30:20 +0200
From: Andrei Botila <andrei.botila@....nxp.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Heiner Kallweit <hkallweit1@...il.com>,
 Russell King <linux@...linux.org.uk>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, s32@....com,
 Christophe Lizzi <clizzi@...hat.com>, Alberto Ruiz <aruizrui@...hat.com>,
 Enric Balletbo <eballetb@...hat.com>
Subject: Re: [PATCH 1/3] net: phy: nxp-c45-tja11xx: add support for TJA1121

On 2/27/2025 6:14 PM, Andrew Lunn wrote:
> On Thu, Feb 27, 2025 at 06:00:54PM +0200, Andrei Botila wrote:
>> Add naming for TJA1121 since TJA1121 is based on TJA1120 but with
>> additional MACsec IP.
>> Same applies for TJA1103 which shares the same hardware as TJA1104 with
>> the latter having MACsec IP enabled.
>>
>> Signed-off-by: Andrei Botila <andrei.botila@....nxp.com>
>> ---
>>   drivers/net/phy/Kconfig           | 2 +-
>>   drivers/net/phy/nxp-c45-tja11xx.c | 8 +++++---
>>   2 files changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
>> index 41c15a2c2037..d29f9f7fd2e1 100644
>> --- a/drivers/net/phy/Kconfig
>> +++ b/drivers/net/phy/Kconfig
>> @@ -328,7 +328,7 @@ config NXP_C45_TJA11XX_PHY
>>   	depends on MACSEC || !MACSEC
>>   	help
>>   	  Enable support for NXP C45 TJA11XX PHYs.
>> -	  Currently supports the TJA1103, TJA1104 and TJA1120 PHYs.
>> +	  Currently supports the TJA1103, TJA1104, TJA1120 and TJA1121 PHYs.
>>   
>>   config NXP_TJA11XX_PHY
>>   	tristate "NXP TJA11xx PHYs support"
>> diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tja11xx.c
>> index 34231b5b9175..244b5889e805 100644
>> --- a/drivers/net/phy/nxp-c45-tja11xx.c
>> +++ b/drivers/net/phy/nxp-c45-tja11xx.c
>> @@ -1,6 +1,6 @@
>>   // SPDX-License-Identifier: GPL-2.0
>>   /* NXP C45 PHY driver
>> - * Copyright 2021-2023 NXP
>> + * Copyright 2021-2025 NXP
>>    * Author: Radu Pirea <radu-nicolae.pirea@....nxp.com>
>>    */
>>   
>> @@ -19,7 +19,9 @@
>>   
>>   #include "nxp-c45-tja11xx.h"
>>   
>> +/* Same id: TJA1103, TJA1104 */
>>   #define PHY_ID_TJA_1103			0x001BB010
>> +/* Same id: TJA1120, TJA1121 */
>>   #define PHY_ID_TJA_1120			0x001BB031
> 
> Is there a way to tell them apart? Another register somewhere?

Unfortunately no, TJA1120 and TJA1121 share the same hardware the only 
difference being that TJA1121 has MACsec support while TJA1120 does not.
It is the same for TJA1103 and TJA1104.

Best regards,
Andrei

> 
> 	Andrew