drivers: ethernet: mcux: rework how unique mac is determined

Instead of having a Kconfig property, if there is no local-mac-address
property in the devicetree than we'll generate a unique MAC address
based on unique ID registers on the SoC.

We remove the local-mac-address properties in the SoC dtsi files to
match the default behavior that existed before (ie, unique MAC address)

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

drivers/ethernet/Kconfig.mcux

@@ -54,43 +54,12 @@ config ETH_MCUX_0
 	help
 	  Include port 0 driver
 
-if ETH_MCUX_0
-
-choice ETH_MCUX_0_MAC_SELECT
-	prompt "MAC address"
-	help
-	  Choose how to configure MAC address.
-
-config ETH_MCUX_0_UNIQUE_MAC
-	bool "Stable MAC address"
-	help
-	  Generate MAC address from MCU's unique identification register.
-endchoice
-
-endif # ETH_MCUX_0
-
 config ETH_MCUX_1
 	bool "MCUX Ethernet port 1"
 	depends on SOC_MIMXRT1062 || SOC_MIMXRT1064
 	help
 	  Include port 1 driver
 
-if ETH_MCUX_1
-
-choice ETH_MCUX_1_MAC_SELECT
-	prompt "MAC address"
-	help
-	  Choose how to configure MAC address.
-
-config ETH_MCUX_1_UNIQUE_MAC
-	bool "Stable MAC address"
-	help
-	  Generate MAC address from MCU's unique identification register.
-
-endchoice
-
-endif # ETH_MCUX_1
-
 config ETH_MCUX_HW_ACCELERATION
 	bool "Enable hardware acceleration"
 	help

drivers/ethernet/eth_mcux.c

@@ -887,8 +887,8 @@ static void generate_random_mac(u8_t *mac_addr)
 }
 #endif
 
-#if defined(CONFIG_ETH_MCUX_0_UNIQUE_MAC) || \
+#if !DT_INST_NODE_HAS_PROP(0, local_mac_address) || \
-    defined(CONFIG_ETH_MCUX_1_UNIQUE_MAC)
+    DT_HAS_NODE_STATUS_OKAY(DT_DRV_INST(1)) && !DT_INST_NODE_HAS_PROP(1, local_mac_address)
 static void generate_eth0_unique_mac(u8_t *mac_addr)
 {
 	/* Trivially "hash" up to 128 bits of MCU unique identifier */
@@ -907,7 +907,7 @@ static void generate_eth0_unique_mac(u8_t *mac_addr)
 }
 #endif
 
-#if defined(CONFIG_ETH_MCUX_1_UNIQUE_MAC)
+#if DT_HAS_NODE_STATUS_OKAY(DT_DRV_INST(1)) && !DT_INST_NODE_HAS_PROP(1, local_mac_address)
 static void generate_eth1_unique_mac(u8_t *mac_addr)
 {
 	generate_eth0_unique_mac(mac_addr);
@@ -1204,15 +1204,14 @@ static struct eth_context eth_0_context = {
 	.phy_addr = 0U,
 	.phy_duplex = kPHY_FullDuplex,
 	.phy_speed = kPHY_Speed100M,
-#if defined(CONFIG_ETH_MCUX_0_UNIQUE_MAC)
-	.generate_mac = generate_eth0_unique_mac,
-#endif
 #if DT_INST_PROP(0, zephyr_random_mac_address)
 	.generate_mac = generate_random_mac,
 #endif
 #if NODE_HAS_VALID_MAC_ADDR(DT_DRV_INST(0))
 	.mac_addr = DT_INST_PROP(0, local_mac_address),
 	.generate_mac = NULL,
+#else
+	.generate_mac = generate_eth0_unique_mac,
 #endif
 };
 
@@ -1271,15 +1270,14 @@ static struct eth_context eth_1_context = {
 	.phy_addr = 0U,
 	.phy_duplex = kPHY_FullDuplex,
 	.phy_speed = kPHY_Speed100M,
-#if defined(CONFIG_ETH_MCUX_1_UNIQUE_MAC)
-	.generate_mac = generate_eth1_unique_mac,
-#endif
 #if DT_INST_PROP(1, zephyr_random_mac_address)
 	.generate_mac = generate_random_mac,
 #endif
 #if NODE_HAS_VALID_MAC_ADDR(DT_DRV_INST(1))
 	.mac_addr = DT_INST_PROP(1, local_mac_address),
 	.generate_mac = NULL,
+#else
+	.generate_mac = generate_eth1_unique_mac,
 #endif
 };
 

dts/arm/nxp/nxp_k6x.dtsi

@@ -473,7 +473,6 @@
 			interrupts = <83 0>, <84 0>, <85 0>;
 			interrupt-names = "TX", "RX", "ERR_MISC";
 			status = "disabled";
-			local-mac-address = [00 00 00 00 00 00];
 			label = "ETH_0";
 			clocks = <&sim KINETIS_SIM_CORESYS_CLK 0 0>;
 			ptp {

dts/arm/nxp/nxp_rt.dtsi

@@ -536,7 +536,6 @@
 			interrupts = <114 0>;
 			interrupt-names = "COMMON";
 			status = "disabled";
-			local-mac-address = [00 00 00 00 00 00];
 			label = "ETH_0";
 			ptp {
 				compatible = "nxp,kinetis-ptp";

dts/arm/nxp/nxp_rt1060.dtsi

@@ -30,7 +30,6 @@
 			interrupts = <152 0>;
 			interrupt-names = "COMMON";
 			status = "disabled";
-			local-mac-address = [00 00 00 00 00 00];
 			label = "ETH_1";
 			ptp {
 				compatible = "nxp,kinetis-ptp";