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arch/arm/src/imxrt/imxrt_enet.c: The board would not come up if I ran Nuttx from cold. I dumped the PHY registers to see what the differences were and the PHY was coming up in NANDTree mode. This is a mode for testing connectivity between the PHY and the MAC. Switching this mode off in the PHY registers has fixed the problem.

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This commit is contained in:
Dave Marples
2018-09-25 06:52:07 -06:00
committed by Gregory Nutt
parent ec498d2660
commit 681609ad51
1 changed files with 14 additions and 0 deletions
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arch/arm/src/imxrt/imxrt_enet.c
+14
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@@ -2025,9 +2025,23 @@ static inline int imxrt_initphy(struct imxrt_driver_s *priv)
return ret;
}
/* Indicate 50MHz clock */
imxrt_writemii(priv, phyaddr, MII_KSZ8081_PHYCTRL2,
(phydata | (1 << 7)));
/* Switch off NAND Tree mode */
ret = imxrt_readmii(priv, phyaddr, MII_KSZ8081_OMSO, &phydata);
if (ret < 0)
{
nerr("ERROR: Failed to read MII_KSZ8081_OMSO: %d\n", ret);
return ret;
}
imxrt_writemii(priv, phyaddr, MII_KSZ8081_OMSO,
(phydata & ~(1 << 5)));
/* Start auto negotiation */
ninfo("%s: Start Autonegotiation...\n", BOARD_PHY_NAME);