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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
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1234567891011121314151617181920212223242526272829303132333435363738394041// SPDX-License-Identifier: GPL-2.0-only/* * * Copyright (C) 2014 ARM Limited */
#include <linux/clocksource.h>#include <linux/io.h>#include <linux/of.h>#include <linux/of_address.h>#include <linux/sched_clock.h>
#define SYS_24MHZ 0x05c
static void __iomem *versatile_sys_24mhz;
static u64 notrace versatile_sys_24mhz_read(void){ return readl(versatile_sys_24mhz);}
static int __init versatile_sched_clock_init(struct device_node *node){ void __iomem *base = of_iomap(node, 0);
of_node_clear_flag(node, OF_POPULATED);
if (!base) return -ENXIO;
versatile_sys_24mhz = base + SYS_24MHZ;
sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
return 0;}TIMER_OF_DECLARE(vexpress, "arm,vexpress-sysreg", versatile_sched_clock_init);TIMER_OF_DECLARE(versatile, "arm,versatile-sysreg", versatile_sched_clock_init);