static void charlcd_4bit_init()

in arm-charlcd.c [233:257]

• 18 lines of code
• 1 McCabe index (conditional complexity)

static void charlcd_4bit_init(struct charlcd *lcd)
{
	/* These commands cannot be checked with the busy flag */
	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
	msleep(5);
	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
	udelay(100);
	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
	udelay(100);
	/* Go to 4bit mode */
	writel(HD_FUNCSET, lcd->virtbase + CHAR_COM);
	udelay(100);
	/*
	 * 4bit mode, 2 lines, 5x8 font, after this the number of lines
	 * and the font cannot be changed until the next initialization sequence
	 */
	charlcd_4bit_command(lcd, HD_FUNCSET | HD_FUNCSET_2_LINES);
	charlcd_4bit_command(lcd, HD_DISPCTRL | HD_DISPCTRL_ON);
	charlcd_4bit_command(lcd, HD_ENTRYMODE | HD_ENTRYMODE_INCREMENT);
	charlcd_4bit_command(lcd, HD_CLEAR);
	charlcd_4bit_command(lcd, HD_HOME);
	/* Put something useful in the display */
	charlcd_4bit_print(lcd, 0, "ARM Linux");
	charlcd_4bit_print(lcd, 1, UTS_RELEASE);
}