static int max77693_led_parse_dt()

in flash/leds-max77693.c [596:696]

• 88 lines of code
• 16 McCabe index (conditional complexity)

static int max77693_led_parse_dt(struct max77693_led_device *led,
				struct max77693_led_config_data *cfg,
				struct device_node **sub_nodes)
{
	struct device *dev = &led->pdev->dev;
	struct max77693_sub_led *sub_leds = led->sub_leds;
	struct device_node *node = dev_of_node(dev), *child_node;
	struct property *prop;
	u32 led_sources[2];
	int i, ret, fled_id;

	of_property_read_u32(node, "maxim,boost-mode", &cfg->boost_mode);
	of_property_read_u32(node, "maxim,boost-mvout", &cfg->boost_vout);
	of_property_read_u32(node, "maxim,mvsys-min", &cfg->low_vsys);

	for_each_available_child_of_node(node, child_node) {
		prop = of_find_property(child_node, "led-sources", NULL);
		if (prop) {
			const __be32 *srcs = NULL;

			for (i = 0; i < ARRAY_SIZE(led_sources); ++i) {
				srcs = of_prop_next_u32(prop, srcs,
							&led_sources[i]);
				if (!srcs)
					break;
			}
		} else {
			dev_err(dev,
				"led-sources DT property missing\n");
			of_node_put(child_node);
			return -EINVAL;
		}

		if (i == 2) {
			fled_id = FLED1;
			led->fled_mask = FLED1_IOUT | FLED2_IOUT;
		} else if (led_sources[0] == FLED1) {
			fled_id = FLED1;
			led->fled_mask |= FLED1_IOUT;
		} else if (led_sources[0] == FLED2) {
			fled_id = FLED2;
			led->fled_mask |= FLED2_IOUT;
		} else {
			dev_err(dev,
				"Wrong led-sources DT property value.\n");
			of_node_put(child_node);
			return -EINVAL;
		}

		if (sub_nodes[fled_id]) {
			dev_err(dev,
				"Conflicting \"led-sources\" DT properties\n");
			of_node_put(child_node);
			return -EINVAL;
		}

		sub_nodes[fled_id] = child_node;
		sub_leds[fled_id].fled_id = fled_id;

		cfg->label[fled_id] =
			of_get_property(child_node, "label", NULL) ? :
						child_node->name;

		ret = of_property_read_u32(child_node, "led-max-microamp",
					&cfg->iout_torch_max[fled_id]);
		if (ret < 0) {
			cfg->iout_torch_max[fled_id] = TORCH_IOUT_MIN;
			dev_warn(dev, "led-max-microamp DT property missing\n");
		}

		ret = of_property_read_u32(child_node, "flash-max-microamp",
					&cfg->iout_flash_max[fled_id]);
		if (ret < 0) {
			cfg->iout_flash_max[fled_id] = FLASH_IOUT_MIN;
			dev_warn(dev,
				 "flash-max-microamp DT property missing\n");
		}

		ret = of_property_read_u32(child_node, "flash-max-timeout-us",
					&cfg->flash_timeout_max[fled_id]);
		if (ret < 0) {
			cfg->flash_timeout_max[fled_id] = FLASH_TIMEOUT_MIN;
			dev_warn(dev,
				 "flash-max-timeout-us DT property missing\n");
		}

		if (++cfg->num_leds == 2 ||
		    (max77693_fled_used(led, FLED1) &&
		     max77693_fled_used(led, FLED2))) {
			of_node_put(child_node);
			break;
		}
	}

	if (cfg->num_leds == 0) {
		dev_err(dev, "No DT child node found for connected LED(s).\n");
		return -EINVAL;
	}

	return 0;
}