net, davinci_emac: let the EMAC detect the PHYs

Once the MDIO state machine has been initialized and enabled, it
starts polling all 32 PHY addresses on the MDIO bus, looking for
an active PHY. Add a 5 ms delay, so all PHYs are for sure detected.

This problem was detected on the cmc board with a KSZ8864 switch.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index d58c28b..a8905b8 100644 (file)
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -680,6 +680,9 @@ int davinci_emac_initialize(void)
 
        davinci_eth_mdio_enable();
 
+       /* let the EMAC detect the PHYs */
+       udelay(5000);
+
        for (i = 0; i < 256; i++) {
                if (readl(&adap_mdio->ALIVE))
                        break;