ARM: OMAP4: SMP: Add mpu timer support for OMAP4430

This patch adds SMP platform specific parts for local(mpu) timer support
for OMAP4430 platform. Each Cortex-a9 core has it's own local timer in the
MPU domain. These timers are not in wakeup domain.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 2ce474a9d2b6..97eeeebcb066 100644
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -38,6 +38,7 @@
 
 #include <asm/mach/time.h>
 #include <mach/dmtimer.h>
+#include <asm/localtimer.h>
 
 /* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
 #define MAX_GPTIMER_ID          12
@@ -229,6 +230,9 @@ static void __init omap2_gp_clocksource_init(void)
 
 static void __init omap2_gp_timer_init(void)
 {
+#ifdef CONFIG_LOCAL_TIMERS
+        twd_base = IO_ADDRESS(OMAP44XX_LOCAL_TWD_BASE);
+#endif
         omap_dm_timer_init();
 
         omap2_gp_clockevent_init();
diff --git a/arch/arm/mach-omap2/timer-mpu.c b/arch/arm/mach-omap2/timer-mpu.c
new file mode 100644
index 000000000000..c1a650a9910f
--- /dev/null
+++ b/arch/arm/mach-omap2/timer-mpu.c
@@ -0,0 +1,34 @@
+/*
+ * The MPU local timer source file. In OMAP4, both cortex-a9 cores have
+ * own timer in it's MPU domain. These timers will be driving the
+ * linux kernel SMP tick framework when active. These timers are not
+ * part of the wake up domain.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ *      Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * This file is based on arm realview smp platform file.
+ * Copyright (C) 2002 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/clockchips.h>
+#include <asm/irq.h>
+#include <asm/smp_twd.h>
+#include <asm/localtimer.h>
+
+/*
+ * Setup the local clock events for a CPU.
+ */
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
+{
+        evt->irq = INT_44XX_LOCALTIMER_IRQ;
+        twd_timer_setup(evt);
+}
+