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 d58c28bca30facf59ebb8d8ffee6a60503724040..a8905b88f19fb958d0d5a18e6c715439c69456e1 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;