From 04c77d9130b693e56a477364af1e1be4379b1b49 Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Wed, 1 Feb 2023 22:14:54 +0900
Subject: [PATCH] net: renesas: rswitch: Add "max-speed" handling
The previous code set the speed by the interface mode of PHY.
Also this hardware has a restriction which cannot change the speed
at runtime. To use other speed, add "max-speed" handling to set
each port's speed if needed.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/renesas/rswitch.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index f1a0dd1098f96..50b61a0a7f535 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1072,13 +1072,23 @@ static struct device_node *rswitch_get_port_node(struct rswitch_device *rdev)
static int rswitch_etha_get_params(struct rswitch_device *rdev)
{
+ u32 max_speed;
int err;
if (!rdev->np_port)
return 0; /* ignored */
err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface);
+ if (err)
+ return err;
+
+ err = of_property_read_u32(rdev->np_port, "max-speed", &max_speed);
+ if (!err) {
+ rdev->etha->speed = max_speed;
+ return 0;
+ }
+ /* if no "max-speed" property, let's use default speed */
switch (rdev->etha->phy_interface) {
case PHY_INTERFACE_MODE_MII:
rdev->etha->speed = SPEED_100;
@@ -1090,11 +1100,10 @@ static int rswitch_etha_get_params(struct rswitch_device *rdev)
rdev->etha->speed = SPEED_2500;
break;
default:
- err = -EINVAL;
- break;
+ return -EINVAL;
}
- return err;
+ return 0;
}
static int rswitch_mii_register(struct rswitch_device *rdev)