arch/arm/mach-omap2/timer-mpu.c

   1 /*
   2  * The MPU local timer source file. In OMAP4, both cortex-a9 cores have
   3  * own timer in it's MPU domain. These timers will be driving the
   4  * linux kernel SMP tick framework when active. These timers are not
   5  * part of the wake up domain.
   6  *
   7  * Copyright (C) 2009 Texas Instruments, Inc.
   8  *
   9  * Author:
  10  *      Santosh Shilimkar <santosh.shilimkar@ti.com>
  11  *
  12  * This file is based on arm realview smp platform file.
  13  * Copyright (C) 2002 ARM Ltd.
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License version 2 as
  17  * published by the Free Software Foundation.
  18  */
  19 #include <linux/init.h>
  20 #include <linux/smp.h>
  21 #include <linux/clockchips.h>
  22 #include <asm/irq.h>
  23 #include <asm/smp_twd.h>
  24 #include <asm/localtimer.h>
  25
  26 /*
  27  * Setup the local clock events for a CPU.
  28  */
  29 int __cpuinit local_timer_setup(struct clock_event_device *evt)
  30 {
  31         /* Local timers are not supprted on OMAP4430 ES1.0 */
  32         if (omap_rev() == OMAP4430_REV_ES1_0)
  33                 return -ENXIO;
  34
  35         evt->irq = OMAP44XX_IRQ_LOCALTIMER;
  36         twd_timer_setup(evt);
  37         return 0;
  38 }
  39