linux/drivers/clocksource/timer-sun5i.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Allwinner SoCs hstimer driver.
 *
 * Copyright (C) 2013 Maxime Ripard
 *
 * Maxime Ripard <[email protected]>
 */

#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/clocksource.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqreturn.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/platform_device.h>

#define TIMER_IRQ_EN_REG …
#define TIMER_IRQ_EN(val) …
#define TIMER_IRQ_ST_REG …
#define TIMER_CTL_REG(val) …
#define TIMER_CTL_ENABLE …
#define TIMER_CTL_RELOAD …
#define TIMER_CTL_CLK_PRES(val) …
#define TIMER_CTL_ONESHOT …
#define TIMER_INTVAL_LO_REG(val) …
#define TIMER_INTVAL_HI_REG(val) …
#define TIMER_CNTVAL_LO_REG(val) …
#define TIMER_CNTVAL_HI_REG(val) …

#define TIMER_SYNC_TICKS …

struct sun5i_timer { … };

#define nb_to_sun5i_timer(x) …
#define clksrc_to_sun5i_timer(x) …
#define clkevt_to_sun5i_timer(x) …

/*
 * When we disable a timer, we need to wait at least for 2 cycles of
 * the timer source clock. We will use for that the clocksource timer
 * that is already setup and runs at the same frequency than the other
 * timers, and we never will be disabled.
 */
static void sun5i_clkevt_sync(struct sun5i_timer *ce)
{ … }

static void sun5i_clkevt_time_stop(struct sun5i_timer *ce, u8 timer)
{ … }

static void sun5i_clkevt_time_setup(struct sun5i_timer *ce, u8 timer, u32 delay)
{ … }

static void sun5i_clkevt_time_start(struct sun5i_timer *ce, u8 timer, bool periodic)
{ … }

static int sun5i_clkevt_shutdown(struct clock_event_device *clkevt)
{ … }

static int sun5i_clkevt_set_oneshot(struct clock_event_device *clkevt)
{ … }

static int sun5i_clkevt_set_periodic(struct clock_event_device *clkevt)
{ … }

static int sun5i_clkevt_next_event(unsigned long evt,
				   struct clock_event_device *clkevt)
{ … }

static irqreturn_t sun5i_timer_interrupt(int irq, void *dev_id)
{ … }

static u64 sun5i_clksrc_read(struct clocksource *clksrc)
{ … }

static int sun5i_rate_cb(struct notifier_block *nb,
			 unsigned long event, void *data)
{ … }

static int sun5i_setup_clocksource(struct platform_device *pdev,
				   unsigned long rate)
{ … }

static int sun5i_setup_clockevent(struct platform_device *pdev,
				  unsigned long rate, int irq)
{ … }

static int sun5i_timer_probe(struct platform_device *pdev)
{ … }

static void sun5i_timer_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id sun5i_timer_of_match[] = …;
MODULE_DEVICE_TABLE(of, sun5i_timer_of_match);

static struct platform_driver sun5i_timer_driver = …;
module_platform_driver(…) …;