mv88e6xxx: Add SERDES Support for mv88e6321

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 <thomas.eckerman.ext@ericsson.com>
Signed-off-by: Thomas Eckerman <thomas.eckerman.ext@ericsson.com>
Signed-off-by: Fidan Aliyeva <fidan.aliyeva.ext@ericsson.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260528210310.1365858-4-fidan.aliyeva.ext@ericsson.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index b63a8200e2878be8743da477b80e0939457e7c25..80b877c74513d665e2e4831a9479773f64e39678 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5272,10 +5272,14 @@ 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 48db9932b989f41b9234c43a6dd7955653a0d694..4a394d47923e913a724cf676340ca0aa22e4870d 100644 (file)
--- 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 21e050b328cce0a8dca6e7ff96a87e21fe9b1c4e..e8f254909d6b257b0601f791fbdcb68093898d45 100644 (file)
--- 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);