test: dm: pci: Add tests for configuration space access

So far we missed the testing for PCI configuration space access.
This adds tests for it, as well as removing some redundant asserts.
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

test/dm/pci.c

@@ -6,6 +6,7 @@
 #include <common.h>
 #include <dm.h>
 #include <asm/io.h>
+#include <asm/test.h>
 #include <dm/test.h>
 #include <test/ut.h>
 
@@ -24,27 +25,32 @@ DM_TEST(dm_test_pci_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
 static int dm_test_pci_busdev(struct unit_test_state *uts)
 {
 	struct udevice *bus;
-	struct udevice *emul, *swap;
+	struct udevice *swap;
+	u16 vendor, device;
 
 	/* Test bus#0 and its devices */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));
 
-	ut_assertok(uclass_get_device(UCLASS_PCI_EMUL, 0, &emul));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x00, 0), &swap));
-	ut_assert(device_active(swap));
-	ut_assertok(uclass_get_device(UCLASS_PCI_EMUL, 1, &emul));
+	vendor = 0;
+	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
+	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));
-	ut_assert(device_active(swap));
+	device = 0;
+	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
+	ut_asserteq(SANDBOX_PCI_DEVICE_ID, device);
 
 	/* Test bus#1 and its devices */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));
 
-	ut_assertok(uclass_get_device(UCLASS_PCI_EMUL, 2, &emul));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));
-	ut_assert(device_active(swap));
-	ut_assertok(uclass_get_device(UCLASS_PCI_EMUL, 3, &emul));
+	vendor = 0;
+	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
+	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x0c, 0), &swap));
-	ut_assert(device_active(swap));
+	device = 0;
+	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
+	ut_asserteq(SANDBOX_PCI_DEVICE_ID, device);
 
 	return 0;
 }