linux/drivers/clocksource/bcm_kona_timer.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2012 Broadcom Corporation

#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/clockchips.h>
#include <linux/types.h>
#include <linux/clk.h>

#include <linux/io.h>

#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>


#define KONA_GPTIMER_STCS_OFFSET …
#define KONA_GPTIMER_STCLO_OFFSET …
#define KONA_GPTIMER_STCHI_OFFSET …
#define KONA_GPTIMER_STCM0_OFFSET …

#define KONA_GPTIMER_STCS_TIMER_MATCH_SHIFT …
#define KONA_GPTIMER_STCS_COMPARE_ENABLE_SHIFT …

struct kona_bcm_timers { … };

static struct kona_bcm_timers timers;

static u32 arch_timer_rate;

/*
 * We use the peripheral timers for system tick, the cpu global timer for
 * profile tick
 */
static void kona_timer_disable_and_clear(void __iomem *base)
{ … }

static int
kona_timer_get_counter(void __iomem *timer_base, uint32_t *msw, uint32_t *lsw)
{ … }

static int kona_timer_set_next_event(unsigned long clc,
				  struct clock_event_device *unused)
{ … }

static int kona_timer_shutdown(struct clock_event_device *evt)
{ … }

static struct clock_event_device kona_clockevent_timer = …;

static void __init kona_timer_clockevents_init(void)
{ … }

static irqreturn_t kona_timer_interrupt(int irq, void *dev_id)
{ … }

static int __init kona_timer_init(struct device_node *node)
{ … }

TIMER_OF_DECLARE(brcm_kona, "brcm,kona-timer", kona_timer_init);
/*
 * bcm,kona-timer is deprecated by brcm,kona-timer
 * being kept here for driver compatibility
 */
TIMER_OF_DECLARE(bcm_kona, "bcm,kona-timer", kona_timer_init);