[PATCH] net: gem: Disable PCS autonegotiation in case of fixed-link

[Michal Simek]

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 <goran.marinkovic at psi.ch>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>
---

 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 a158824fc9fd..8cbe40dc75b1 100644
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -448,8 +448,12 @@ 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(&regs->pcscntrl) | ZYNQ_GEM_PCS_CTL_ANEG_ENBL,
 		       &regs->pcscntrl);
+	else
+		writel(readl(&regs->pcscntrl) & ~ZYNQ_GEM_PCS_CTL_ANEG_ENBL,
+		       &regs->pcscntrl);
 #endif
 	}
 
-- 
2.26.2