| Message ID | 20191114165847.11725-3-alexandru.marginean@nxp.com |
|---|---|
| State | Accepted |
| Commit | 6c9644685940e1d98c2d38fb205e8da14f3690b5 |
| Delegated to: | Joe Hershberger |
| Headers | show |
| Series | [U-Boot,1/3] drivers: net: fsl_enetc: Add 2.5Gbps to supported link speeds | expand |
On Thu, Nov 14, 2019 at 10:59 AM Alex Marginean <alexandru.marginean@nxp.com> wrote: > > 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>
diff --git a/drivers/net/fsl_enetc_mdio.c b/drivers/net/fsl_enetc_mdio.c index b4463a58a5..47257a6cf6 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,
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> --- drivers/net/fsl_enetc_mdio.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)