static int charlcd_init()

in charlcd.c [564:595]

• 20 lines of code
• 5 McCabe index (conditional complexity)

static int charlcd_init(struct charlcd *lcd)
{
	struct charlcd_priv *priv = charlcd_to_priv(lcd);
	int ret;

	priv->flags = ((lcd->height > 1) ? LCD_FLAG_N : 0) | LCD_FLAG_D |
		      LCD_FLAG_C | LCD_FLAG_B;
	if (lcd->ops->backlight) {
		mutex_init(&priv->bl_tempo_lock);
		INIT_DELAYED_WORK(&priv->bl_work, charlcd_bl_off);
	}

	/*
	 * before this line, we must NOT send anything to the display.
	 * Since charlcd_init_display() needs to write data, we have to
	 * enable mark the LCD initialized just before.
	 */
	if (WARN_ON(!lcd->ops->init_display))
		return -EINVAL;

	ret = lcd->ops->init_display(lcd);
	if (ret)
		return ret;

	/* display a short message */
	charlcd_puts(lcd, "\x1b[Lc\x1b[Lb" LCD_INIT_BL LCD_INIT_TEXT);

	/* clear the display on the next device opening */
	priv->must_clear = true;
	charlcd_home(lcd);
	return 0;
}