[PATCH net-next v3 3/3] mv88e6xxx: Add SERDES Support for mv88e6321
From: Fidan Aliyeva <hidden>
Date: 2026-05-28 21:03:57
Also in:
lkml
Subsystem:
marvell 88e6xxx ethernet switch fabric driver, networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
Add serdes and pcs_ops functions for mv88e6321. In mv88e6321 2 ports support serdes functionality; port 0 and port 1. These ports are serdes-only ports. Changes: 1. Add a function support to return the lane address for the port based on cmode. 2. Reuse mv88e6352's serdes_get_regs* and pcs_init functions for mv88e6321. Tested on mv88e6321 switch port 0. Co-developed-by: Thomas Eckerman <redacted> Signed-off-by: Thomas Eckerman <redacted> Signed-off-by: Fidan Aliyeva <redacted> --- drivers/net/dsa/mv88e6xxx/chip.c | 4 ++++ drivers/net/dsa/mv88e6xxx/serdes.c | 18 ++++++++++++++++++ drivers/net/dsa/mv88e6xxx/serdes.h | 3 +++ 3 files changed, 25 insertions(+)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 30c8f6e1b367..6c48a99c3b7f 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c@@ -5270,10 +5270,14 @@ static const struct mv88e6xxx_ops mv88e6321_ops = { .vtu_loadpurge = mv88e6352_g1_vtu_loadpurge, .stu_getnext = mv88e6352_g1_stu_getnext, .stu_loadpurge = mv88e6352_g1_stu_loadpurge, + .serdes_get_lane = mv88e6321_serdes_get_lane, + .serdes_get_regs_len = mv88e6352_serdes_get_regs_len, + .serdes_get_regs = mv88e6352_serdes_get_regs, .gpio_ops = &mv88e6352_gpio_ops, .avb_ops = &mv88e6352_avb_ops, .ptp_ops = &mv88e6352_ptp_ops, .phylink_get_caps = mv88e632x_phylink_get_caps, + .pcs_ops = &mv88e6352_pcs_ops, }; static const struct mv88e6xxx_ops mv88e6341_ops = {
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index 48db9932b989..4a394d47923e 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c@@ -241,6 +241,24 @@ void mv88e6352_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p) } } +int mv88e6321_serdes_get_lane(struct mv88e6xxx_chip *chip, int port) +{ + int lane = -ENODEV; + u8 cmode; + + if (port != 0 && port != 1) + return lane; + + cmode = chip->ports[port].cmode; + + if (cmode == MV88E6XXX_PORT_STS_CMODE_100BASEX || + cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX || + cmode == MV88E6XXX_PORT_STS_CMODE_SGMII) + lane = port + MV88E6321_PORT0_LANE; + + return lane; +} + int mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port) { u8 cmode = chip->ports[port].cmode;
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.h b/drivers/net/dsa/mv88e6xxx/serdes.h
index 21e050b328cc..e8f254909d6b 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.h
+++ b/drivers/net/dsa/mv88e6xxx/serdes.h@@ -14,6 +14,8 @@ struct phylink_link_state; +#define MV88E6321_PORT0_LANE 0x0c + #define MV88E6352_ADDR_SERDES 0x0f #define MV88E6352_SERDES_PAGE_FIBER 0x01 #define MV88E6352_SERDES_IRQ 0x0b
@@ -114,6 +116,7 @@ struct phylink_link_state; int mv88e6xxx_pcs_decode_state(struct device *dev, u16 bmsr, u16 lpa, u16 status, struct phylink_link_state *state); +int mv88e6321_serdes_get_lane(struct mv88e6xxx_chip *chip, int port); int mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port); int mv88e6352_serdes_get_lane(struct mv88e6xxx_chip *chip, int port); int mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port); --
2.36.0