Eric Lee / smarc-uboot

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Commit 6c9644685940e1d98c2d38fb205e8da14f3690b5

Authored by Alex Marginean
Committed by Joe Hershberger
1 parent a931f78307
Exists in smarc_8mq_lf_v2020.04 and in 9 other branches 8qm-imx_v2020.04_5.4.70_2.3.0, emb_lf_v2022.04, pitx_8mp_lf_v2020.04, smarc-8m-android-10.0.0_2.6.0, smarc-8m-android-11.0.0_2.0.0, smarc-8mp-android-11.0.0_2.0.0, smarc_8mm-imx_v2020.04_5.4.24_2.1.0, smarc_8mp_lf_v2020.04, smarc_8mq-imx_v2020.04_5.4.24_2.1.0

drivers: net: fsl_enetc_mdio: return with time-out if HW is stuck 

On some boards MDIO may get stuck if it detects echo on the line.  This is
a know hardware issue, there is a board fix for it.  In case we're running
on a board that doesn't have the fix, we don't want to loop here forever
and freeze U-Boot.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

Showing 1 changed file with 6 additions and 1 deletions Side-by-side Diff

drivers/net/fsl_enetc_mdio.c
Diff comments   View file @ 6c96446
... ... @@ -17,8 +17,13 @@
17 17  
18 18 static void enetc_mdio_wait_bsy(struct enetc_mdio_priv *priv)
19 19 {
20   - while (enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY)
  20 + int to = 10000;
  21 +
  22 + while ((enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) &&
  23 + --to)
21 24 cpu_relax();
  25 + if (!to)
  26 + printf("T");
22 27 }
23 28  
24 29 int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,