[PATCH v1 2/2] net: stmmac: add fixed_phy support via fixed-link DT binding

[Ming Lei]

Signed-off-by: Ming Lei <ming.lei at canonical.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    5 ++++-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |   10 ++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 8c6b7c16..ddb4351 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -847,8 +847,11 @@ static int stmmac_init_phy(struct net_device *dev)
 	 * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
 	 * device as well.
 	 * Note: phydev->phy_id is the result of reading the UID PHY registers.
+	 * But phy_id returned from fixed phy is always zero, so bypass the
+	 * check for fixed phy.
 	 */
-	if (phydev->phy_id == 0) {
+	if (phydev->phy_id == 0 && (!priv->plat->phy_bus_name ||
+			strcmp(priv->plat->phy_bus_name,"fixed"))) {
 		phy_disconnect(phydev);
 		return -ENODEV;
 	}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 3039de2..73a3ced 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -27,6 +27,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/of_device.h>
+#include <linux/of_mdio.h>
 
 #include "stmmac.h"
 #include "stmmac_platform.h"
@@ -216,6 +217,15 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
 		plat->pmt = 1;
 	}
 
+	if (of_phy_is_fixed_link(np)) {
+		int ret = of_phy_register_fixed_link(np);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to register fixed PHY\n");
+			return ret;
+		}
+		plat->phy_bus_name = "fixed";
+	}
+
 	if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
 		of_device_is_compatible(np, "snps,dwmac-3.710")) {
 		plat->enh_desc = 1;
-- 
1.7.9.5