dm: test: Add a new test case for dm_test_eth_rotate

Add one more ethernet device node in the sandbox test device tree,
with name 'sbe5'. This is to support a new test case for testing
network device rotation.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

arch/sandbox/dts/test.dts

@@ -9,6 +9,7 @@
 	aliases {
 		console = &uart0;
 		eth0 = "/eth@10002000";
+		eth3 = &eth_3;
 		eth5 = &eth_5;
 		i2c0 = "/i2c@0";
 		pci0 = &pci;
@@ -121,6 +122,12 @@
 		fake-host-hwaddr = <0x00 0x00 0x66 0x44 0x22 0x11>;
 	};
 
+	eth_3: sbe5 {
+		compatible = "sandbox,eth";
+		reg = <0x10005000 0x1000>;
+		fake-host-hwaddr = <0x00 0x00 0x66 0x44 0x22 0x33>;
+	};
+
 	eth@10004000 {
 		compatible = "sandbox,eth";
 		reg = <0x10004000 0x1000>;

include/configs/sandbox.h

@@ -187,7 +187,8 @@
 
 #define SANDBOX_ETH_SETTINGS		"ethaddr=00:00:11:22:33:44\0" \
 					"eth1addr=00:00:11:22:33:45\0" \
-					"eth5addr=00:00:11:22:33:46\0" \
+					"eth3addr=00:00:11:22:33:46\0" \
+					"eth5addr=00:00:11:22:33:47\0" \
 					"ipaddr=1.2.3.4\0"
 
 #define MEM_LAYOUT_ENV_SETTINGS \

test/dm/eth.c

@@ -106,6 +106,11 @@ static int _dm_test_eth_rotate2(struct unit_test_state *uts)
 	ut_assertok(net_loop(PING));
 	ut_asserteq_str("eth@10004000", getenv("ethact"));
 
+	/* Make sure we can handle device name which is not eth# */
+	setenv("ethact", "sbe5");
+	ut_assertok(net_loop(PING));
+	ut_asserteq_str("sbe5", getenv("ethact"));
+
 	return 0;
 }