[PATCH v4 19/22] mdio_bus: Allow for non PHY-devices on MDIO buses

[Andrey Smirnov <andrew.smirnov@gmail.com>]

Instead of just creating a simple PHY device for every child of MDIO
bus node, add code to check if any of them have "compatible" property
set, as well as code to create a proper platform device for such
cases.

This change is useful for when MDIO bus and some of Ethernet ports are
connected to a switch or some other MDIO device that doesn't behave
like a generic PHY and can't be probed via its PHY ID.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/net/phy/mdio_bus.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index d7d6d8940..cda05afae 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -26,6 +26,7 @@
 #include <errno.h>
 #include <linux/phy.h>
 #include <linux/err.h>
+#include <of_device.h>
 
 #define DEFAULT_GPIO_RESET_ASSERT       1000      /* us */
 #define DEFAULT_GPIO_RESET_DEASSERT     1000      /* us */
@@ -179,8 +180,19 @@ static int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 
 	/* Loop over the child nodes and register a phy_device for each one */
 	for_each_available_child_of_node(np, child) {
-		if (!of_mdiobus_child_is_phy(child))
+		if (!of_mdiobus_child_is_phy(child)) {
+			if (of_get_property(child, "compatible", NULL)) {
+				if (!of_platform_device_create(child,
+							       &mdio->dev)) {
+					dev_err(&mdio->dev,
+						"Failed to create device "
+						"for %s\n",
+						child->full_name);
+				}
+			}
+
 			continue;
+		}
 
 		ret = of_property_read_u32(child, "reg", &addr);
 		if (ret) {
-- 
2.17.1


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