static int lp55xx_init_led()

in leds-lp55xx-common.c [159:235]

• 66 lines of code
• 11 McCabe index (conditional complexity)

static int lp55xx_init_led(struct lp55xx_led *led,
			struct lp55xx_chip *chip, int chan)
{
	struct lp55xx_platform_data *pdata = chip->pdata;
	struct lp55xx_device_config *cfg = chip->cfg;
	struct device *dev = &chip->cl->dev;
	int max_channel = cfg->max_channel;
	struct mc_subled *mc_led_info;
	struct led_classdev *led_cdev;
	char name[32];
	int i, j = 0;
	int ret;

	if (chan >= max_channel) {
		dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
		return -EINVAL;
	}

	if (pdata->led_config[chan].led_current == 0)
		return 0;

	if (pdata->led_config[chan].name) {
		led->cdev.name = pdata->led_config[chan].name;
	} else {
		snprintf(name, sizeof(name), "%s:channel%d",
			pdata->label ? : chip->cl->name, chan);
		led->cdev.name = name;
	}

	if (pdata->led_config[chan].num_colors > 1) {
		mc_led_info = devm_kcalloc(dev,
					   pdata->led_config[chan].num_colors,
					   sizeof(*mc_led_info), GFP_KERNEL);
		if (!mc_led_info)
			return -ENOMEM;

		led_cdev = &led->mc_cdev.led_cdev;
		led_cdev->name = led->cdev.name;
		led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
		led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
		for (i = 0; i < led->mc_cdev.num_colors; i++) {
			mc_led_info[i].color_index =
				pdata->led_config[chan].color_id[i];
			mc_led_info[i].channel =
					pdata->led_config[chan].output_num[i];
			j++;
		}

		led->mc_cdev.subled_info = mc_led_info;
	} else {
		led->cdev.brightness_set_blocking = lp55xx_set_brightness;
	}

	led->cdev.groups = lp55xx_led_groups;
	led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
	led->led_current = pdata->led_config[chan].led_current;
	led->max_current = pdata->led_config[chan].max_current;
	led->chan_nr = pdata->led_config[chan].chan_nr;

	if (led->chan_nr >= max_channel) {
		dev_err(dev, "Use channel numbers between 0 and %d\n",
			max_channel - 1);
		return -EINVAL;
	}

	if (pdata->led_config[chan].num_colors > 1)
		ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
	else
		ret = devm_led_classdev_register(dev, &led->cdev);

	if (ret) {
		dev_err(dev, "led register err: %d\n", ret);
		return ret;
	}

	return 0;
}