diff options
| -rw-r--r-- | include/dm/uclass.h | 17 | ||||
| -rw-r--r-- | test/dm/test-fdt.c | 21 |
2 files changed, 38 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 484d166..74b8e2e 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -366,6 +366,23 @@ int uclass_next_device_check(struct udevice **devp); int uclass_resolve_seq(struct udevice *dev); /** + * uclass_id_foreach_dev() - Helper function to iteration through devices + * + * This creates a for() loop which works through the available devices in + * a uclass ID in order from start to end. + * + * If for some reason the uclass cannot be found, this does nothing. + * + * @id: enum uclass_id ID to use + * @pos: struct udevice * to hold the current device. Set to NULL when there + * are no more devices. + * @uc: temporary uclass variable (struct udevice *) + */ +#define uclass_id_foreach_dev(id, pos, uc) \ + if (!uclass_get(id, &uc)) \ + list_for_each_entry(pos, &uc->dev_head, uclass_node) + +/** * uclass_foreach_dev() - Helper function to iteration through devices * * This creates a for() loop which works through the available devices in diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c index d59c449..8ea536c 100644 --- a/test/dm/test-fdt.c +++ b/test/dm/test-fdt.c @@ -448,6 +448,27 @@ static int dm_test_first_next_device(struct unit_test_state *uts) } DM_TEST(dm_test_first_next_device, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); +/* Test iteration through devices in a uclass */ +static int dm_test_uclass_foreach(struct unit_test_state *uts) +{ + struct udevice *dev; + struct uclass *uc; + int count; + + count = 0; + uclass_id_foreach_dev(UCLASS_TEST_FDT, dev, uc) + count++; + ut_asserteq(8, count); + + count = 0; + uclass_foreach_dev(dev, uc) + count++; + ut_asserteq(8, count); + + return 0; +} +DM_TEST(dm_test_uclass_foreach, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + /** * check_devices() - Check return values and pointers * |