linux/drivers/clocksource/clksrc-dbx500-prcmu.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) ST-Ericsson SA 2011
 *
 * Author: Mattias Wallin <[email protected]> for ST-Ericsson
 * Author: Sundar Iyer for ST-Ericsson
 * sched_clock implementation is based on:
 * plat-nomadik/timer.c Linus Walleij <[email protected]>
 *
 * DBx500-PRCMU Timer
 * The PRCMU has 5 timers which are available in a always-on
 * power domain.  We use the Timer 4 for our always-on clock
 * source on DB8500.
 */
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/clockchips.h>

#define RATE_32K …

#define TIMER_MODE_CONTINUOUS …
#define TIMER_DOWNCOUNT_VAL …

#define PRCMU_TIMER_REF …
#define PRCMU_TIMER_DOWNCOUNT …
#define PRCMU_TIMER_MODE …

static void __iomem *clksrc_dbx500_timer_base;

static u64 notrace clksrc_dbx500_prcmu_read(struct clocksource *cs)
{ … }

static struct clocksource clocksource_dbx500_prcmu = …;

static int __init clksrc_dbx500_prcmu_init(struct device_node *node)
{ … }
TIMER_OF_DECLARE(dbx500_prcmu, "stericsson,db8500-prcmu-timer-4",
		       clksrc_dbx500_prcmu_init);