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authorSimon Glass <sjg@chromium.org>2014-07-23 06:55:19 -0600
committerSimon Glass <sjg@chromium.org>2014-07-23 14:08:37 +0100
commit997c87bb0b1981fd33e34cefc26d9138f27326ce (patch)
tree450a1bc245f3c0984cf4827b6dd43c3948dafcdb /test
parent1ca7e2062b4e8c3b211753dcb19c063b5b9b73ca (diff)
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dm: Add functions to access a device's children
Devices can have childen that can be addressed by a simple index, the sequence number or a device tree offset. Add functions to access a child in each of these ways. The index is typically used as a fallback when the sequence number is not available. For example we may use a serial UART with sequence number 0 as the console, but if no UART has sequence number 0, then we can fall back to just using the first UART (index 0). The device tree offset function is useful for buses, where they want to locate one of their children. The device tree can be scanned to find the offset of each child, and that offset can then find the device. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'test')
-rw-r--r--test/dm/bus.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/test/dm/bus.c b/test/dm/bus.c
index cfb9934..08a4725 100644
--- a/test/dm/bus.c
+++ b/test/dm/bus.c
@@ -61,3 +61,49 @@ static int dm_test_bus_children(struct dm_test_state *dms)
return 0;
}
DM_TEST(dm_test_bus_children, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test our functions for accessing children */
+static int dm_test_bus_children_funcs(struct dm_test_state *dms)
+{
+ const void *blob = gd->fdt_blob;
+ struct udevice *bus, *dev;
+ int node;
+
+ ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
+
+ /* device_get_child() */
+ ut_assertok(device_get_child(bus, 0, &dev));
+ ut_asserteq(-ENODEV, device_get_child(bus, 4, &dev));
+ ut_assertok(device_get_child_by_seq(bus, 5, &dev));
+ ut_assert(dev->flags & DM_FLAG_ACTIVATED);
+ ut_asserteq_str("c-test@5", dev->name);
+
+ /* Device with sequence number 0 should be accessible */
+ ut_asserteq(-ENODEV, device_find_child_by_seq(bus, -1, true, &dev));
+ ut_assertok(device_find_child_by_seq(bus, 0, true, &dev));
+ ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
+ ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 0, false, &dev));
+ ut_assertok(device_get_child_by_seq(bus, 0, &dev));
+ ut_assert(dev->flags & DM_FLAG_ACTIVATED);
+
+ /* There is no device with sequence number 2 */
+ ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, false, &dev));
+ ut_asserteq(-ENODEV, device_find_child_by_seq(bus, 2, true, &dev));
+ ut_asserteq(-ENODEV, device_get_child_by_seq(bus, 2, &dev));
+
+ /* Looking for something that is not a child */
+ node = fdt_path_offset(blob, "/junk");
+ ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
+ node = fdt_path_offset(blob, "/d-test");
+ ut_asserteq(-ENODEV, device_find_child_by_of_offset(bus, node, &dev));
+
+ /* Find a valid child */
+ node = fdt_path_offset(blob, "/some-bus/c-test@1");
+ ut_assertok(device_find_child_by_of_offset(bus, node, &dev));
+ ut_assert(!(dev->flags & DM_FLAG_ACTIVATED));
+ ut_assertok(device_get_child_by_of_offset(bus, node, &dev));
+ ut_assert(dev->flags & DM_FLAG_ACTIVATED);
+
+ return 0;
+}
+DM_TEST(dm_test_bus_children_funcs, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);