[PATCH 09/14] MIPS: lantiq: enable oprofile support on lantiq targets

[John Crispin <blogic@openwrt.org>]

This patch sets the performance counters irq and HAVE_OPROFILE flag for Lantiq
SoCs.

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/Kconfig      |    1 +
 arch/mips/lantiq/irq.c |    6 ++++++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ce30e2f..948f2a0 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -229,6 +229,7 @@ config LANTIQ
        select SWAP_IO_SPACE
        select BOOT_RAW
        select HAVE_CLK
+       select HAVE_OPROFILE
        select MIPS_MACHINE
 
 config LASAT
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index b6b1c72..bfd4ad1 100644
--- a/arch/mips/lantiq/irq.c
+++ b/arch/mips/lantiq/irq.c
@@ -40,6 +40,9 @@
 
 #define MAX_EIU                        6
 
+/* the performance counter */
+#define LTQ_PERF_IRQ           (INT_NUM_IM4_IRL0 + 31)
+
 /* irqs generated by device attached to the EBU need to be acked in
  * a special manner
  */
@@ -316,6 +319,9 @@ void __init arch_init_irq(void)
        set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
                IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
 #endif
+
+       /* tell oprofile which irq to use */
+       cp0_perfcount_irq = LTQ_PERF_IRQ;
 }
 
 unsigned int __cpuinit get_c0_compare_int(void)
-- 
1.7.9.1