static int aat1290_led_parse_dt()

in flash/leds-aat1290.c [215:289]

• 61 lines of code
• 8 McCabe index (conditional complexity)

static int aat1290_led_parse_dt(struct aat1290_led *led,
			struct aat1290_led_config_data *cfg,
			struct device_node **sub_node)
{
	struct device *dev = &led->pdev->dev;
	struct device_node *child_node;
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
	struct pinctrl *pinctrl;
#endif
	int ret = 0;

	led->gpio_fl_en = devm_gpiod_get(dev, "flen", GPIOD_ASIS);
	if (IS_ERR(led->gpio_fl_en)) {
		ret = PTR_ERR(led->gpio_fl_en);
		dev_err(dev, "Unable to claim gpio \"flen\".\n");
		return ret;
	}

	led->gpio_en_set = devm_gpiod_get(dev, "enset", GPIOD_ASIS);
	if (IS_ERR(led->gpio_en_set)) {
		ret = PTR_ERR(led->gpio_en_set);
		dev_err(dev, "Unable to claim gpio \"enset\".\n");
		return ret;
	}

#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
	pinctrl = devm_pinctrl_get_select_default(&led->pdev->dev);
	if (IS_ERR(pinctrl)) {
		cfg->has_external_strobe = false;
		dev_info(dev,
			 "No support for external strobe detected.\n");
	} else {
		cfg->has_external_strobe = true;
	}
#endif

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

	ret = of_property_read_u32(child_node, "led-max-microamp",
				&cfg->max_mm_current);
	/*
	 * led-max-microamp will default to 1/20 of flash-max-microamp
	 * in case it is missing.
	 */
	if (ret < 0)
		dev_warn(dev,
			"led-max-microamp DT property missing\n");

	ret = of_property_read_u32(child_node, "flash-max-microamp",
				&cfg->max_flash_current);
	if (ret < 0) {
		dev_err(dev,
			"flash-max-microamp DT property missing\n");
		goto err_parse_dt;
	}

	ret = of_property_read_u32(child_node, "flash-max-timeout-us",
				&cfg->max_flash_tm);
	if (ret < 0) {
		dev_err(dev,
			"flash-max-timeout-us DT property missing\n");
		goto err_parse_dt;
	}

	*sub_node = child_node;

err_parse_dt:
	of_node_put(child_node);

	return ret;
}