[PATCH v2 3/7] net: macb: Add phy address to read it from device tree

[Padmarao Begari]

Read phy address from device tree and use it to find the phy device
if not found then search in the range of 0 to 31.

Signed-off-by: Padmarao Begari <padmarao.beg...@microchip.com>
---
 drivers/net/macb.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index e0e86a274e..7f592d510c 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -477,6 +477,12 @@ static int macb_phy_find(struct macb_device *macb, const 
char *name)
        int i;
        u16 phy_id;
 
+       phy_id = macb_mdio_read(macb, macb->phy_addr, MII_PHYSID1);
+       if (phy_id != 0xffff) {
+               printf("%s: PHY present at %d\n", name, macb->phy_addr);
+               return 0;
+       }
+
        /* Search for PHY... */
        for (i = 0; i < 32; i++) {
                macb->phy_addr = i;
@@ -1256,6 +1262,8 @@ static int macb_eth_probe(struct udevice *dev)
        struct macb_device *macb = dev_get_priv(dev);
        const char *phy_mode;
        int ret;
+       u32 phy_addr;
+       ofnode node;
 
        phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode",
                               NULL);
@@ -1266,6 +1274,13 @@ static int macb_eth_probe(struct udevice *dev)
                return -EINVAL;
        }
 
+       /* Look for a PHY node under the Ethernet node */
+       node = dev_read_subnode(dev, "ethernet-phy");
+       if (ofnode_valid(node)) {
+               ofnode_read_u32(node, "reg", &phy_addr);
+               macb->phy_addr = phy_addr;
+       }
+
        macb->regs = (void *)pdata->iobase;
 
        macb->is_big_endian = (cpu_to_be32(0x12345678) == 0x12345678);
-- 
2.17.1