From 50dae8eb3a442cf9f98e78e24e52aa2f0acc3f56 Mon Sep 17 00:00:00 2001 From: Aleksandar Gerasimovski Date: Fri, 4 Jun 2021 13:40:58 +0000 Subject: [PATCH] net: tsec: add option to set device max-speed via dts Current tsec adapter sets adapter gigabit capabilities by default, and in reality this must not always be the case. It is possible that tsec adapter is used for 100Mbps connection, and in this case setting 1000Mbps capabilities can lead to some side effects such longer autoneg process. In our ls102x designs this problem leads to long autoneg times (> 4 sec) in case board rgmii link is 100Mbps capable only. Limiting the rgmii link capabilities provides faster and smoother link establishment. Signed-off-by: Aleksandar Gerasimovski Reviewed-by: Vladimir Oltean Reviewed-by: Bin Meng Reviewed-by: Priyanka Jain --- drivers/net/tsec.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c index c68e4b7..ee820aa 100644 --- a/drivers/net/tsec.c +++ b/drivers/net/tsec.c @@ -828,6 +828,7 @@ int tsec_probe(struct udevice *dev) const char *phy_mode; ofnode parent, child; fdt_addr_t reg; + u32 max_speed; int ret; data = (struct tsec_data *)dev_get_driver_data(dev); @@ -893,8 +894,12 @@ int tsec_probe(struct udevice *dev) } priv->interface = pdata->phy_interface; + /* Check for speed limit, default is 1000Mbps */ + max_speed = dev_read_u32_default(dev, "max-speed", 1000); + /* Initialize flags */ - priv->flags = TSEC_GIGABIT; + if (max_speed == 1000) + priv->flags = TSEC_GIGABIT; if (priv->interface == PHY_INTERFACE_MODE_SGMII) priv->flags |= TSEC_SGMII; -- 2.7.4