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e129440af6
Try to map TWD registers basing on a "arm,*-twd-timer" Device Tree node. This overrides existing twd_base value. Signed-off-by: Pawel Moll <pawel.moll@arm.com>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* linux/arch/arm/plat-versatile/localtimer.c
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*
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* Copyright (C) 2002 ARM Ltd.
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* All Rights Reserved
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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 <linux/of.h>
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#include <linux/of_address.h>
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#include <asm/smp_twd.h>
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#include <asm/localtimer.h>
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#include <mach/irqs.h>
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const static struct of_device_id twd_of_match[] __initconst = {
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{ .compatible = "arm,cortex-a9-twd-timer", },
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{ .compatible = "arm,cortex-a5-twd-timer", },
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{ .compatible = "arm,arm11mp-twd-timer", },
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{ },
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};
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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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#if defined(CONFIG_OF)
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static int dt_node_probed;
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/* Look for TWD node only once */
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if (!dt_node_probed) {
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struct device_node *node = of_find_matching_node(NULL,
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twd_of_match);
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if (node)
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twd_base = of_iomap(node, 0);
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dt_node_probed = 1;
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}
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#endif
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if (!twd_base)
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return -ENXIO;
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evt->irq = IRQ_LOCALTIMER;
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twd_timer_setup(evt);
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return 0;
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}
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