From 26e62cc9713ebe728d01826e8c22c3c56f8e3bf4 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 13 May 2020 08:05:01 -0600 Subject: [PATCH] net: gem: Disable PCS autonegotiation in case of fixed-link Disable PCS autonegotiation if fixed-link node is present in device tree. This way systems with multiple GEM instances with a combination of SGMII-fixed and SGMII-PHY will work. Reported-by: Goran Marinkovic Signed-off-by: Michal Simek Signed-off-by: Ashok Reddy Soma Signed-off-by: Michal Simek --- drivers/net/zynq_gem.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index 412daf7d58..da4b6fba9f 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -451,8 +451,12 @@ static int zynq_gem_init(struct udevice *dev) nwconfig |= ZYNQ_GEM_NWCFG_SGMII_ENBL | ZYNQ_GEM_NWCFG_PCS_SEL; #ifdef CONFIG_ARM64 + if (priv->phydev->phy_id != PHY_FIXED_ID) writel(readl(®s->pcscntrl) | ZYNQ_GEM_PCS_CTL_ANEG_ENBL, ®s->pcscntrl); + else + writel(readl(®s->pcscntrl) & ~ZYNQ_GEM_PCS_CTL_ANEG_ENBL, + ®s->pcscntrl); #endif } -- 2.25.1