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

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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@psi.ch>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2020-05-13 08:05:01 -06:00
parent 7831292fc9
commit 26e62cc971
1 changed files with 4 additions and 0 deletions
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4
drivers/net/zynq_gem.c
View file

@ -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(&regs->pcscntrl) | ZYNQ_GEM_PCS_CTL_ANEG_ENBL,
&regs->pcscntrl);
else
writel(readl(&regs->pcscntrl) & ~ZYNQ_GEM_PCS_CTL_ANEG_ENBL,
&regs->pcscntrl);
#endif
}