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

From: Ante Knezic
Date: Fri Jul 14 2023 - 10:37:11 EST


>> +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.

will do.

>> + 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?

Unfortunately, no. This is one of those undocumented registers. I will
make a note of it in the commit message.

>> + 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?

Errata I have available refers only to 6190x and 6390x. Not sure about other devices.

>Please sort these into numerical order.

will do.