dm: Add basic tests

Add some tests of driver model functionality. Coverage includes:

- basic init
- binding of drivers to devices using platform_data
- automatic probing of devices when referenced
- availability of platform data to devices
- lifecycle from bind to probe to remove to unbind
- renumbering within a uclass when devices are probed/removed
- calling driver-defined operations
- deactivation of drivers when removed
- memory leak across creation and destruction of drivers/uclasses
- uclass init/destroy methods
- automatic probe/remove of children/parents when needed

This function is enabled for sandbox, using CONFIG_DM_TEST.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/test/dm/test-main.c b/test/dm/test-main.c
new file mode 100644
index 000000000..828ed46f8
--- /dev/null
+++ b/test/dm/test-main.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <dm/test.h>
+#include <dm/root.h>
+#include <dm/uclass-internal.h>
+#include <dm/ut.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct dm_test_state global_test_state;
+
+/* Get ready for testing */
+static int dm_test_init(struct dm_test_state *dms)
+{
+	memset(dms, '\0', sizeof(*dms));
+	gd->dm_root = NULL;
+	memset(dm_testdrv_op_count, '\0', sizeof(dm_testdrv_op_count));
+
+	ut_assertok(dm_init());
+	dms->root = dm_root();
+
+	return 0;
+}
+
+/* Ensure all the test devices are probed */
+static int do_autoprobe(struct dm_test_state *dms)
+{
+	struct device *dev;
+	int ret;
+
+	/* Scanning the uclass is enough to probe all the devices */
+	for (ret = uclass_first_device(UCLASS_TEST, &dev);
+	     dev;
+	     ret = uclass_next_device(&dev))
+		;
+
+	return ret;
+}
+
+static int dm_test_destroy(struct dm_test_state *dms)
+{
+	int id;
+
+	for (id = 0; id < UCLASS_COUNT; id++) {
+		struct uclass *uc;
+
+		/*
+		 * If the uclass doesn't exist we don't want to create it. So
+		 * check that here before we call uclass_find_device()/
+		 */
+		uc = uclass_find(id);
+		if (!uc)
+			continue;
+		ut_assertok(uclass_destroy(uc));
+	}
+
+	return 0;
+}
+
+int dm_test_main(void)
+{
+	struct dm_test *tests = ll_entry_start(struct dm_test, dm_test);
+	const int n_ents = ll_entry_count(struct dm_test, dm_test);
+	struct dm_test_state *dms = &global_test_state;
+	struct dm_test *test;
+
+	/*
+	 * If we have no device tree, or it only has a root node, then these
+	 * tests clearly aren't going to work...
+	 */
+	if (!gd->fdt_blob || fdt_next_node(gd->fdt_blob, 0, NULL) < 0) {
+		puts("Please run with test device tree:\n"
+		     "     dtc -I dts -O dtb test/dm/test.dts  -o test/dm/test.dtb\n"
+		     "    ./u-boot -d test/dm/test.dtb\n");
+		ut_assert(gd->fdt_blob);
+	}
+
+	printf("Running %d driver model tests\n", n_ents);
+
+	for (test = tests; test < tests + n_ents; test++) {
+		printf("Test: %s\n", test->name);
+		ut_assertok(dm_test_init(dms));
+
+		if (test->flags & DM_TESTF_SCAN_PDATA)
+			ut_assertok(dm_scan_platdata());
+		if (test->flags & DM_TESTF_PROBE_TEST)
+			ut_assertok(do_autoprobe(dms));
+		if (test->flags & DM_TESTF_SCAN_FDT)
+			ut_assertok(dm_scan_fdt(gd->fdt_blob));
+
+		if (test->func(dms))
+			break;
+
+		ut_assertok(dm_test_destroy(dms));
+	}
+
+	printf("Failures: %d\n", dms->fail_count);
+
+	return 0;
+}