--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -43,6 +43,7 @@
 #include <asm/mmu_context.h>
 #include <asm/types.h>
 #include <asm/stacktrace.h>
+#include <asm/time.h>
 
 extern asmlinkage void handle_int(void);
 extern asmlinkage void handle_tlbm(void);
@@ -1464,6 +1465,8 @@
 	 */
 	if (cpu_has_mips_r2) {
 		cp0_compare_irq = (read_c0_intctl() >> 29) & 7;
+		if (get_c0_compare_irq)
+			cp0_compare_irq = get_c0_compare_irq();
 		cp0_perfcount_irq = (read_c0_intctl() >> 26) & 7;
 		if (cp0_perfcount_irq == cp0_compare_irq)
 			cp0_perfcount_irq = -1;
--- a/include/asm-mips/time.h
+++ b/include/asm-mips/time.h
@@ -53,6 +53,7 @@
 #ifdef CONFIG_CEVT_R4K
 extern int mips_clockevent_init(void);
 extern unsigned int __weak get_c0_compare_int(void);
+extern unsigned int __weak get_c0_compare_irq(void);
 #else
 static inline int mips_clockevent_init(void)
 {
--- a/arch/mips/atheros/board.c
+++ b/arch/mips/atheros/board.c
@@ -205,6 +205,11 @@
 void __init plat_time_init(void) {
     board_time_init();
 }
+
+unsigned int __init get_c0_compare_irq(void)
+{
+	return CP0_LEGACY_COMPARE_IRQ;
+}
 #endif
 
 void __init arch_init_irq(void)