C++ (Cpp) device_get_child Examples

Example #1

File: bus.c Project: 0xFelix/u-boot-edminiv2

/* Test our functions for accessing children */
static int dm_test_bus_children_funcs(struct unit_test_state *uts)
{
	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;
}

Example #2

File: sunxi_gpio.c Project: axxia/axxia_u-boot

static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
			    struct ofnode_phandle_args *args)
{
	int ret;

	ret = device_get_child(dev, args->args[0], &desc->dev);
	if (ret)
		return ret;
	desc->offset = args->args[1];
	desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;

	return 0;
}

Example #3

File: spmi.c Project: 0xFelix/u-boot-edminiv2

/* Test if it's possible to read bus directly and indirectly */
static int dm_test_spmi_access(struct unit_test_state *uts)
{
	const char *pmic_name = "pm8916@0";
	struct udevice *bus, *pmic;

	ut_assertok(uclass_get_device(UCLASS_SPMI, 0, &bus));

	ut_assertok(device_get_child(bus, 0, &pmic));

	/* Sanity check if it's proper PMIC */
	ut_asserteq_str(pmic_name, pmic->name);

	/* Read PMIC ID reg using SPMI bus - it assumes it has slaveID == 0*/
	ut_asserteq(spmi_reg_read(bus, 0, 0xC0, 0x4), 0x10);
	ut_asserteq(spmi_reg_read(bus, 0, 0xC0, 0x5), 0x5);

	/* Read ID reg via pmic interface */
	ut_asserteq(pmic_reg_read(pmic, 0xC004), 0x10);
	ut_asserteq(pmic_reg_read(pmic, 0xC005), 0x5);

	return 0;
}