linux/drivers/clocksource/timer-digicolor.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Conexant Digicolor timer driver
 *
 * Author: Baruch Siach <[email protected]>
 *
 * Copyright (C) 2014 Paradox Innovation Ltd.
 *
 * Based on:
 *	Allwinner SoCs hstimer driver
 *
 * Copyright (C) 2013 Maxime Ripard
 *
 * Maxime Ripard <[email protected]>
 */

/*
 * Conexant Digicolor SoCs have 8 configurable timers, named from "Timer A" to
 * "Timer H". Timer A is the only one with watchdog support, so it is dedicated
 * to the watchdog driver. This driver uses Timer B for sched_clock(), and
 * Timer C for clockevents.
 */

#define pr_fmt(fmt) …

#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqreturn.h>
#include <linux/sched/clock.h>
#include <linux/sched_clock.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>

enum { … };

#define CONTROL(t) …
#define COUNT(t) …

#define CONTROL_DISABLE …
#define CONTROL_ENABLE …
#define CONTROL_MODE(m) …
#define CONTROL_MODE_ONESHOT …
#define CONTROL_MODE_PERIODIC …

struct digicolor_timer { … };

static struct digicolor_timer *dc_timer(struct clock_event_device *ce)
{ … }

static inline void dc_timer_disable(struct clock_event_device *ce)
{ … }

static inline void dc_timer_enable(struct clock_event_device *ce, u32 mode)
{ … }

static inline void dc_timer_set_count(struct clock_event_device *ce,
				      unsigned long count)
{ … }

static int digicolor_clkevt_shutdown(struct clock_event_device *ce)
{ … }

static int digicolor_clkevt_set_oneshot(struct clock_event_device *ce)
{ … }

static int digicolor_clkevt_set_periodic(struct clock_event_device *ce)
{ … }

static int digicolor_clkevt_next_event(unsigned long evt,
				       struct clock_event_device *ce)
{ … }

static struct digicolor_timer dc_timer_dev = …;

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

static u64 notrace digicolor_timer_sched_read(void)
{ … }

static int __init digicolor_timer_init(struct device_node *node)
{ … }
TIMER_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer",
		       digicolor_timer_init);