From 04c77d9130b693e56a477364af1e1be4379b1b49 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda 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 Signed-off-by: David S. Miller --- 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)