41 lines
866 B
C
41 lines
866 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2014 ARM Limited
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*/
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#include <linux/clocksource.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/sched_clock.h>
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#define SYS_24MHZ 0x05c
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static void __iomem *versatile_sys_24mhz;
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static u64 notrace versatile_sys_24mhz_read(void)
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{
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return readl(versatile_sys_24mhz);
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}
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static int __init versatile_sched_clock_init(struct device_node *node)
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{
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void __iomem *base = of_iomap(node, 0);
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of_node_clear_flag(node, OF_POPULATED);
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if (!base)
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return -ENXIO;
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versatile_sys_24mhz = base + SYS_24MHZ;
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sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
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return 0;
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}
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TIMER_OF_DECLARE(vexpress, "arm,vexpress-sysreg",
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versatile_sched_clock_init);
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TIMER_OF_DECLARE(versatile, "arm,versatile-sysreg",
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versatile_sched_clock_init);
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