diff --git a/arch/mips/loongson/common/early_printk.c b/arch/mips/loongson/common/early_printk.c
index bc73edc0cfd8..8ec4fb2066ae 100644
--- a/arch/mips/loongson/common/early_printk.c
+++ b/arch/mips/loongson/common/early_printk.c
@@ -1,7 +1,7 @@
 /*  early printk support
  *
  *  Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
- *  Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ *  Copyright (c) 2009 Lemote Inc.
  *  Author: Wu Zhangjin, wuzj@lemote.com
  *
  *  This program is free software; you can redistribute  it and/or modify it
@@ -16,20 +16,20 @@
 
 #define PORT(base, offset) (u8 *)(base + offset)
 
-static inline unsigned int serial_in(phys_addr_t base, int offset)
+static inline unsigned int serial_in(unsigned char *base, int offset)
 {
 	return readb(PORT(base, offset));
 }
 
-static inline void serial_out(phys_addr_t base, int offset, int value)
+static inline void serial_out(unsigned char *base, int offset, int value)
 {
 	writeb(value, PORT(base, offset));
 }
 
 void prom_putchar(char c)
 {
-	phys_addr_t uart_base =
-		(phys_addr_t) ioremap_nocache(LOONGSON_UART_BASE, 8);
+	unsigned char *uart_base =
+		(unsigned char *) ioremap_nocache(LOONGSON_UART_BASE, 8);
 
 	while ((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0)
 		;