linux-kernel - Re: [PATCH net-next] net: dsa: mv88e6xxx: Add erratum 3.14 for 88E6390X and 88E6190X

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Message-ID: <570d32ad-e475-4a0b-a6ee-a2bdf5f67b69@lunn.ch>
Date:   Fri, 14 Jul 2023 15:28:21 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ante Knezic <ante.knezic@...mholz.de>
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com, olteanv@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: Add erratum 3.14 for
 88E6390X and 88E6190X

> +static int mv88e6390x_serdes_erratum_3_14(struct mv88e6xxx_chip *chip)
> +{
> +	int lanes[] = { MV88E6390_PORT9_LANE0, MV88E6390_PORT9_LANE1,
> +		MV88E6390_PORT9_LANE2, MV88E6390_PORT9_LANE3,
> +		MV88E6390_PORT10_LANE0, MV88E6390_PORT10_LANE1,
> +		MV88E6390_PORT10_LANE2, MV88E6390_PORT10_LANE3 };

Please make this const. Otherwise you end up with two copies of it.

> +	int err, i;
> +
> +	/* 88e6390x-88e6190x errata 3.14:
> +	 * After chip reset, SERDES reconfiguration or SERDES core
> +	 * Software Reset, the SERDES lanes may not be properly aligned
> +	 * resulting in CRC errors
> +	 */
> +
> +	for (i = 0; i < ARRAY_SIZE(lanes); i++) {
> +		err = mv88e6390_serdes_write(chip, lanes[i],
> +					     MDIO_MMD_PHYXS,
> +					     0xf054, 0x400C);

Does Marvell give this register a name? If so, please add a #define.
Are the bits in the register documented?

> +	if (!err && up) {
> +		if (chip->info->prod_num == MV88E6XXX_PORT_SWITCH_ID_PROD_6390X ||
> +		    chip->info->prod_num == MV88E6XXX_PORT_SWITCH_ID_PROD_6190X)

6191X? 6193X? 

Please sort these into numerical order.


    Andrew

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