74 строки
1.7 KiB
C
74 строки
1.7 KiB
C
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/*
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* Joshua Henderson <joshua.henderson@microchip.com>
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* Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
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*
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* This program is free software; you can distribute it and/or modify it
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* 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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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/clocksource.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/irqdomain.h>
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#include <asm/time.h>
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#include "pic32mzda.h"
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static const struct of_device_id pic32_infra_match[] = {
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{ .compatible = "microchip,pic32mzda-infra", },
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{ },
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};
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#define DEFAULT_CORE_TIMER_INTERRUPT 0
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static unsigned int pic32_xlate_core_timer_irq(void)
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{
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static struct device_node *node;
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unsigned int irq;
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node = of_find_matching_node(NULL, pic32_infra_match);
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if (WARN_ON(!node))
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goto default_map;
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irq = irq_of_parse_and_map(node, 0);
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if (!irq)
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goto default_map;
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return irq;
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default_map:
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return irq_create_mapping(NULL, DEFAULT_CORE_TIMER_INTERRUPT);
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}
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unsigned int get_c0_compare_int(void)
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{
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return pic32_xlate_core_timer_irq();
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}
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void __init plat_time_init(void)
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{
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struct clk *clk;
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of_clk_init(NULL);
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clk = clk_get_sys("cpu_clk", NULL);
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if (IS_ERR(clk))
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panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
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clk_prepare_enable(clk);
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pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
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mips_hpt_frequency = clk_get_rate(clk) / 2;
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clocksource_probe();
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}
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