drivers: ethernet: phy: add PHY_LINK_IS_BASE_T macro

add PHY_LINK_IS_BASE_T macro to check if the link is BASE-T.

Signed-off-by: Fin Maaß <[email protected]>

Author: maass-hamburg

include/zephyr/net/phy.h

@@ -56,6 +56,18 @@ enum phy_link_speed {
 	LINK_FULL_5000BASE_T = BIT(11),
 };
 
+/**
+ * @brief Check if phy link is BASE-T.
+ *
+ * @param x Link capabilities
+ *
+ * @return True if link is BASE-T, false if not.
+ */
+#define PHY_LINK_IS_BASE_T(x)                                                                      \
+	(x & (LINK_HALF_10BASE_T | LINK_FULL_10BASE_T | LINK_HALF_100BASE_T |                      \
+	      LINK_FULL_100BASE_T | LINK_HALF_1000BASE_T | LINK_FULL_1000BASE_T |                  \
+	      LINK_FULL_2500BASE_T | LINK_FULL_5000BASE_T))
+
 /**
  * @brief Check if phy link is full duplex.
  *