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| author | Alex Marginean <alexandru.marginean@nxp.com> | 2019-11-14 18:58:47 +0200 |
|---|---|---|
| committer | Joe Hershberger <joe.hershberger@ni.com> | 2019-12-09 09:47:43 -0600 |
| commit | 6c9644685940e1d98c2d38fb205e8da14f3690b5 (patch) | |
| tree | fd22f4430aaa465a60c47acba79cec074911a297 /drivers/net | |
| parent | a931f78307300070e3a6cb95958f7dcc5fce3bb6 (diff) | |
| download | u-boot-6c9644685940e1d98c2d38fb205e8da14f3690b5.zip u-boot-6c9644685940e1d98c2d38fb205e8da14f3690b5.tar.gz u-boot-6c9644685940e1d98c2d38fb205e8da14f3690b5.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/fsl_enetc_mdio.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/fsl_enetc_mdio.c b/drivers/net/fsl_enetc_mdio.c index b4463a5..47257a6 100644 --- a/drivers/net/fsl_enetc_mdio.c +++ b/drivers/net/fsl_enetc_mdio.c @@ -17,8 +17,13 @@ static void enetc_mdio_wait_bsy(struct enetc_mdio_priv *priv) { - while (enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) + int to = 10000; + + while ((enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) && + --to) cpu_relax(); + if (!to) + printf("T"); } int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad, |