2 * Atheros AR71XX/AR724X/AR913X SoC early printk support
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
13 #include <linux/serial_reg.h>
14 #include <asm/addrspace.h>
16 #include <asm/mach-ath79/ar71xx_regs.h>
18 static inline void prom_wait_thre(void __iomem *base)
23 lsr = __raw_readl(base + UART_LSR * 4);
24 if (lsr & UART_LSR_THRE)
29 void prom_putchar(unsigned char ch)
31 void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE));
34 __raw_writel(ch, base + UART_TX * 4);