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net: rswitch: Implement C22 to C45 access

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Add support for mapping C22 register access to C45-only PHYs.
This is mainly useful for 'mii info' command, which performs
C22 only access to determine PHY ID and link state and does
not work well with this driver so far.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
(cherry picked from commit 678f7c8f56)
This commit is contained in:
Marek Vasut
2024-12-20 01:48:42 +01:00
committed by Simon Glass
parent 5bc9d99a65
commit 748b3f8a2b
1 changed files with 4 additions and 0 deletions
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4
drivers/net/rswitch.c
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@@ -469,6 +469,8 @@ static int rswitch_mii_read_c45(struct mii_dev *miidev, int phyad, int devad, in
/* Access PHY register */
if (devad != MDIO_DEVAD_NONE) /* Definitelly C45 */
val = rswitch_mii_access_c45(etha, true, phyad, devad, regad, 0);
else if (etha->phydev->is_c45) /* C22 access to C45 PHY */
val = rswitch_mii_access_c45(etha, true, phyad, 1, regad, 0);
else
val = rswitch_mii_access_c22(etha, true, phyad, regad, 0);
@@ -500,6 +502,8 @@ int rswitch_mii_write_c45(struct mii_dev *miidev, int phyad, int devad, int rega
/* Access PHY register */
if (devad != MDIO_DEVAD_NONE) /* Definitelly C45 */
rswitch_mii_access_c45(etha, false, phyad, devad, regad, data);
else if (etha->phydev->is_c45) /* C22 access to C45 PHY */
rswitch_mii_access_c45(etha, false, phyad, 1, regad, data);
else
rswitch_mii_access_c22(etha, false, phyad, regad, data);