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net: phy: marvell: fix detection of PHY on Topaz switches 

commit 1fe976d308acb6374c899a4ee8025a0a016e453e upstream.

Since commit fee2d54641 ("net: phy: marvell: mv88e6390 temperature
sensor reading"), Linux reports the temperature of Topaz hwmon as
constant -75°C.

This is because switches from the Topaz family (88E6141 / 88E6341) have
the address of the temperature sensor register different from Peridot.

This address is instead compatible with 88E1510 PHYs, as was used for
Topaz before the above mentioned commit.

Create a new mapping table between switch family and PHY ID for families
which don't have a model number. And define PHY IDs for Topaz and Peridot
families.

Create a new PHY ID and a new PHY driver for Topaz's internal PHY.
The only difference from Peridot's PHY driver is the HWMON probing
method.

Prior this change Topaz's internal PHY is detected by kernel as:

  PHY [...] driver [Marvell 88E6390] (irq=63)

And afterwards as:

  PHY [...] driver [Marvell 88E6341 Family] (irq=63)

Signed-off-by: Pali Rohár <pali@kernel.org>
BugLink: https://github.com/globalscaletechnologies/linux/issues/1
Fixes: fee2d54641 ("net: phy: marvell: mv88e6390 temperature sensor reading")
Reviewed-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pali Rohár 2021-04-12 18:57:39 +02:00 committed by Greg Kroah-Hartman
parent cec3b778f7
commit 3822683fd1
3 changed files with 42 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/dsa/mv88e6xxx/chip.c
View File

@ -2766,10 +2766,17 @@ unlock:
return err;
}
/* prod_id for switch families which do not have a PHY model number */
static const u16 family_prod_id_table[] = {
[MV88E6XXX_FAMILY_6341] = MV88E6XXX_PORT_SWITCH_ID_PROD_6341,
[MV88E6XXX_FAMILY_6390] = MV88E6XXX_PORT_SWITCH_ID_PROD_6390,
};
static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
{
struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
struct mv88e6xxx_chip *chip = mdio_bus->chip;
u16 prod_id;
u16 val;
int err;
@ -2780,23 +2787,12 @@ static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
err = chip->info->ops->phy_read(chip, bus, phy, reg, &val);
mv88e6xxx_reg_unlock(chip);
if (reg == MII_PHYSID2) {
/* Some internal PHYs don't have a model number. */
if (chip->info->family != MV88E6XXX_FAMILY_6165)
/* Then there is the 6165 family. It gets is
* PHYs correct. But it can also have two
* SERDES interfaces in the PHY address
* space. And these don't have a model
* number. But they are not PHYs, so we don't
* want to give them something a PHY driver
* will recognise.
*
* Use the mv88e6390 family model number
* instead, for anything which really could be
* a PHY,
*/
if (!(val & 0x3f0))
val |= MV88E6XXX_PORT_SWITCH_ID_PROD_6390 >> 4;
/* Some internal PHYs don't have a model number. */
if (reg == MII_PHYSID2 && !(val & 0x3f0) &&
chip->info->family < ARRAY_SIZE(family_prod_id_table)) {
prod_id = family_prod_id_table[chip->info->family];
if (prod_id)
val |= prod_id >> 4;
}
return err ? err : val;

29
drivers/net/phy/marvell.c
View File

@ -2401,9 +2401,31 @@ static struct phy_driver marvell_drivers[] = {
.get_stats = marvell_get_stats,
},
{
.phy_id = MARVELL_PHY_ID_88E6390,
.phy_id = MARVELL_PHY_ID_88E6341_FAMILY,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E6390",
.name = "Marvell 88E6341 Family",
/* PHY_GBIT_FEATURES */
.probe = m88e1510_probe,
.config_init = &marvell_config_init,
.config_aneg = &m88e6390_config_aneg,
.read_status = &marvell_read_status,
.ack_interrupt = &marvell_ack_interrupt,
.config_intr = &marvell_config_intr,
.did_interrupt = &m88e1121_did_interrupt,
.resume = &genphy_resume,
.suspend = &genphy_suspend,
.read_page = marvell_read_page,
.write_page = marvell_write_page,
.get_sset_count = marvell_get_sset_count,
.get_strings = marvell_get_strings,
.get_stats = marvell_get_stats,
.get_tunable = m88e1540_get_tunable,
.set_tunable = m88e1540_set_tunable,
},
{
.phy_id = MARVELL_PHY_ID_88E6390_FAMILY,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E6390 Family",
/* PHY_GBIT_FEATURES */
.probe = m88e6390_probe,
.config_init = &marvell_config_init,
@ -2441,7 +2463,8 @@ static struct mdio_device_id __maybe_unused marvell_tbl[] = {
{ MARVELL_PHY_ID_88E1540, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E1545, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E3016, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E6390, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E6341_FAMILY, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E6390_FAMILY, MARVELL_PHY_ID_MASK },
{ }
};

5
include/linux/marvell_phy.h
View File

@ -23,11 +23,12 @@
#define MARVELL_PHY_ID_88X3310 0x002b09a0
#define MARVELL_PHY_ID_88E2110 0x002b09b0
/* The MV88e6390 Ethernet switch contains embedded PHYs. These PHYs do
/* These Ethernet switch families contain embedded PHYs, but they do
* not have a model ID. So the switch driver traps reads to the ID2
* register and returns the switch family ID
*/
#define MARVELL_PHY_ID_88E6390 0x01410f90
#define MARVELL_PHY_ID_88E6341_FAMILY 0x01410f41
#define MARVELL_PHY_ID_88E6390_FAMILY 0x01410f90
#define MARVELL_PHY_FAMILY_ID(id) ((id) >> 4)