static int mlxreg_led_config()

in leds-mlxreg.c [185:255]

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

static int mlxreg_led_config(struct mlxreg_led_priv_data *priv)
{
	struct mlxreg_core_platform_data *led_pdata = priv->pdata;
	struct mlxreg_core_data *data = led_pdata->data;
	struct mlxreg_led_data *led_data;
	struct led_classdev *led_cdev;
	enum led_brightness brightness;
	u32 regval;
	int i;
	int err;

	for (i = 0; i < led_pdata->counter; i++, data++) {
		led_data = devm_kzalloc(&priv->pdev->dev, sizeof(*led_data),
					GFP_KERNEL);
		if (!led_data)
			return -ENOMEM;

		if (data->capability) {
			err = regmap_read(led_pdata->regmap, data->capability,
					  &regval);
			if (err) {
				dev_err(&priv->pdev->dev, "Failed to query capability register\n");
				return err;
			}
			if (!(regval & data->bit))
				continue;
			/*
			 * Field "bit" can contain one capability bit in 0 byte
			 * and offset bit in 1-3 bytes. Clear capability bit and
			 * keep only offset bit.
			 */
			data->bit &= MLXREG_LED_CAPABILITY_CLEAR;
		}

		led_cdev = &led_data->led_cdev;
		led_data->data_parent = priv;
		if (strstr(data->label, "red") ||
		    strstr(data->label, "orange")) {
			brightness = LED_OFF;
			led_data->base_color = MLXREG_LED_RED_SOLID;
		} else if (strstr(data->label, "amber")) {
			brightness = LED_OFF;
			led_data->base_color = MLXREG_LED_AMBER_SOLID;
		} else {
			brightness = LED_OFF;
			led_data->base_color = MLXREG_LED_GREEN_SOLID;
		}
		snprintf(led_data->led_cdev_name, sizeof(led_data->led_cdev_name),
			 "mlxreg:%s", data->label);
		led_cdev->name = led_data->led_cdev_name;
		led_cdev->brightness = brightness;
		led_cdev->max_brightness = LED_ON;
		led_cdev->brightness_set_blocking =
						mlxreg_led_brightness_set;
		led_cdev->brightness_get = mlxreg_led_brightness_get;
		led_cdev->blink_set = mlxreg_led_blink_set;
		led_cdev->flags = LED_CORE_SUSPENDRESUME;
		led_data->data = data;
		err = devm_led_classdev_register(&priv->pdev->dev, led_cdev);
		if (err)
			return err;

		if (led_cdev->brightness)
			mlxreg_led_brightness_set(led_cdev,
						  led_cdev->brightness);
		dev_info(led_cdev->dev, "label: %s, mask: 0x%02x, offset:0x%02x\n",
			 data->label, data->mask, data->reg);
	}

	return 0;
}