static int ktd2692_parse_dt()

in flash/leds-ktd2692.c [270:343]

• 63 lines of code
• 13 McCabe index (conditional complexity)

static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
			    struct ktd2692_led_config_data *cfg)
{
	struct device_node *np = dev_of_node(dev);
	struct device_node *child_node;
	int ret;

	if (!np)
		return -ENXIO;

	led->ctrl_gpio = devm_gpiod_get(dev, "ctrl", GPIOD_ASIS);
	ret = PTR_ERR_OR_ZERO(led->ctrl_gpio);
	if (ret) {
		dev_err(dev, "cannot get ctrl-gpios %d\n", ret);
		return ret;
	}

	led->aux_gpio = devm_gpiod_get(dev, "aux", GPIOD_ASIS);
	ret = PTR_ERR_OR_ZERO(led->aux_gpio);
	if (ret) {
		dev_err(dev, "cannot get aux-gpios %d\n", ret);
		return ret;
	}

	led->regulator = devm_regulator_get(dev, "vin");
	if (IS_ERR(led->regulator))
		led->regulator = NULL;

	if (led->regulator) {
		ret = regulator_enable(led->regulator);
		if (ret) {
			dev_err(dev, "Failed to enable supply: %d\n", ret);
		} else {
			ret = devm_add_action_or_reset(dev,
						regulator_disable_action, dev);
			if (ret)
				return ret;
		}
	}

	child_node = of_get_next_available_child(np, NULL);
	if (!child_node) {
		dev_err(dev, "No DT child node found for connected LED.\n");
		return -EINVAL;
	}

	led->fled_cdev.led_cdev.name =
		of_get_property(child_node, "label", NULL) ? : child_node->name;

	ret = of_property_read_u32(child_node, "led-max-microamp",
				   &cfg->movie_max_microamp);
	if (ret) {
		dev_err(dev, "failed to parse led-max-microamp\n");
		goto err_parse_dt;
	}

	ret = of_property_read_u32(child_node, "flash-max-microamp",
				   &cfg->flash_max_microamp);
	if (ret) {
		dev_err(dev, "failed to parse flash-max-microamp\n");
		goto err_parse_dt;
	}

	ret = of_property_read_u32(child_node, "flash-max-timeout-us",
				   &cfg->flash_max_timeout);
	if (ret) {
		dev_err(dev, "failed to parse flash-max-timeout-us\n");
		goto err_parse_dt;
	}

err_parse_dt:
	of_node_put(child_node);
	return ret;
}