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07787a85c0
On OMAP4430 ES1.0 the local timers are gated by security. Enable the CONFIG_LOCAL_TIMERS for omap2plus build and handle the OMAP4430 es1.0 exception case. This patch has dependency on the first patch in this series. ARM: smp: Select local timers vs dummy timer support runtime Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* The MPU local timer source file. In OMAP4, both cortex-a9 cores have
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* own timer in it's MPU domain. These timers will be driving the
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* linux kernel SMP tick framework when active. These timers are not
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* part of the wake up domain.
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*
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* Copyright (C) 2009 Texas Instruments, Inc.
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*
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* Author:
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* This file is based on arm realview smp platform file.
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* Copyright (C) 2002 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/clockchips.h>
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#include <asm/irq.h>
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#include <asm/smp_twd.h>
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#include <asm/localtimer.h>
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/*
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* Setup the local clock events for a CPU.
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*/
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int __cpuinit local_timer_setup(struct clock_event_device *evt)
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{
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/* Local timers are not supprted on OMAP4430 ES1.0 */
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if (omap_rev() == OMAP4430_REV_ES1_0)
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return -ENXIO;
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evt->irq = OMAP44XX_IRQ_LOCALTIMER;
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twd_timer_setup(evt);
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return 0;
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}
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