net: add MDIO_MUX DM class
Adds a class for MDIO MUXes, which control access to a series of
downstream child MDIOs.
MDIO MUX drivers are required to implement a select function used to switch
between child buses.
MUX children are registered as MDIO buses and they can be used just like
regular MDIOs.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/miiphy.h b/include/miiphy.h
index e6dd441..9b97d09 100644
--- a/include/miiphy.h
+++ b/include/miiphy.h
@@ -167,4 +167,24 @@
#endif
+#ifdef CONFIG_DM_MDIO_MUX
+
+/* indicates none of the child buses is selected */
+#define MDIO_MUX_SELECT_NONE -1
+
+/**
+ * struct mdio_mux_ops - MDIO MUX operations
+ *
+ * @select: Selects a child bus
+ * @deselect: Clean up selection. Optional, can be NULL
+ */
+struct mdio_mux_ops {
+ int (*select)(struct udevice *mux, int cur, int sel);
+ int (*deselect)(struct udevice *mux, int sel);
+};
+
+#define mdio_mux_get_ops(dev) ((struct mdio_mux_ops *)(dev)->driver->ops)
+
+#endif
+
#endif