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Date:   Fri, 28 Oct 2022 09:06:54 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     kuba@...nel.org
Cc:     olteanv@...il.com, andrew@...n.ch, netdev@...r.kernel.org,
        Steffen Bätz <steffen@...osonix.de>,
        Fabio Estevam <festevam@...il.com>
Subject: [PATCH] net: dsa: mv88e6xxx: Add .port_set_rgmii_delay to 88E6320

From: Steffen Bätz <steffen@...osonix.de>

Currently, the port_set_rgmii_delay hook is missing for 88E6320, which
causes failure to retrieve an IP address via DHCP.

Add mv88e6320_port_set_rgmii_delay() that allows applying the RGMII
delay for ports 3 and 4, which are the 10/100/1000 PHYs.

Tested on a i.MX8MN board connected to a 88E6320 switch.

Signed-off-by: Steffen Bätz <steffen@...osonix.de>
Signed-off-by: Fabio Estevam <festevam@...il.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 1 +
 drivers/net/dsa/mv88e6xxx/port.c | 9 +++++++++
 drivers/net/dsa/mv88e6xxx/port.h | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 2479be3a1e35..dc7cbf48bda5 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5029,6 +5029,7 @@ static const struct mv88e6xxx_ops mv88e6320_ops = {
 	.phy_write = mv88e6xxx_g2_smi_phy_write,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
+	.port_set_rgmii_delay = mv88e6320_port_set_rgmii_delay,
 	.port_set_speed_duplex = mv88e6185_port_set_speed_duplex,
 	.port_tag_remap = mv88e6095_port_tag_remap,
 	.port_set_frame_mode = mv88e6351_port_set_frame_mode,
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index 5c4195c635b0..f79cf716c541 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -133,6 +133,15 @@ int mv88e6390_port_set_rgmii_delay(struct mv88e6xxx_chip *chip, int port,
 	return mv88e6xxx_port_set_rgmii_delay(chip, port, mode);
 }
 
+int mv88e6320_port_set_rgmii_delay(struct mv88e6xxx_chip *chip, int port,
+				   phy_interface_t mode)
+{
+	if (port != 2 && port != 5 && port != 6)
+		return -EOPNOTSUPP;
+
+	return mv88e6xxx_port_set_rgmii_delay(chip, port, mode);
+}
+
 int mv88e6xxx_port_set_link(struct mv88e6xxx_chip *chip, int port, int link)
 {
 	u16 reg;
diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h
index cb04243f37c1..fe8f2085bb0b 100644
--- a/drivers/net/dsa/mv88e6xxx/port.h
+++ b/drivers/net/dsa/mv88e6xxx/port.h
@@ -336,6 +336,8 @@ int mv88e6352_port_set_rgmii_delay(struct mv88e6xxx_chip *chip, int port,
 				   phy_interface_t mode);
 int mv88e6390_port_set_rgmii_delay(struct mv88e6xxx_chip *chip, int port,
 				   phy_interface_t mode);
+int mv88e6320_port_set_rgmii_delay(struct mv88e6xxx_chip *chip, int port,
+				   phy_interface_t mode);
 
 int mv88e6xxx_port_set_link(struct mv88e6xxx_chip *chip, int port, int link);
 
-- 
2.25.1

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