arch/arm/mach-omap2/timer-gp.c - kernel/msm-4.19 - Gitiles

 /*
  * linux/arch/arm/mach-omap2/timer-gp.c
  *
  * OMAP2 GP timer support.
  *
  * Copyright (C) 2009 Nokia Corporation
  *
  * Update to use new clocksource/clockevent layers
  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
  * Copyright (C) 2007 MontaVista Software, Inc.
  *
  * Original driver:
  * Copyright (C) 2005 Nokia Corporation
  * Author: Paul Mundt <paul.mundt@nokia.com>
  *         Juha Yrjölä <juha.yrjola@nokia.com>
  * OMAP Dual-mode timer framework support by Timo Teras
  *
  * Some parts based off of TI's 24xx code:
  *
  * Copyright (C) 2004-2009 Texas Instruments, Inc.
  *
  * Roughly modelled after the OMAP1 MPU timer code.
  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License. See the file "COPYING" in the main directory of this archive
  * for more details.
  */
 #include <linux/init.h>
 #include <linux/time.h>
 #include <linux/interrupt.h>
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>

 #include <asm/mach/time.h>
 #include <plat/dmtimer.h>
 #include <asm/localtimer.h>
 #include <asm/sched_clock.h>
 #include <plat/common.h>
 #include <plat/omap_hwmod.h>

 #include "timer-gp.h"

 /* Parent clocks, eventually these will come from the clock framework */

 #define OMAP2_MPU_SOURCE	"sys_ck"
 #define OMAP3_MPU_SOURCE	OMAP2_MPU_SOURCE
 #define OMAP4_MPU_SOURCE	"sys_clkin_ck"
 #define OMAP2_32K_SOURCE	"func_32k_ck"
 #define OMAP3_32K_SOURCE	"omap_32k_fck"
 #define OMAP4_32K_SOURCE	"sys_32k_ck"

 #ifdef CONFIG_OMAP_32K_TIMER
 #define OMAP2_CLKEV_SOURCE	OMAP2_32K_SOURCE
 #define OMAP3_CLKEV_SOURCE	OMAP3_32K_SOURCE
 #define OMAP4_CLKEV_SOURCE	OMAP4_32K_SOURCE
 #define OMAP3_SECURE_TIMER	12
 #else
 #define OMAP2_CLKEV_SOURCE	OMAP2_MPU_SOURCE
 #define OMAP3_CLKEV_SOURCE	OMAP3_MPU_SOURCE
 #define OMAP4_CLKEV_SOURCE	OMAP4_MPU_SOURCE
 #define OMAP3_SECURE_TIMER	1
 #endif

 /* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
 #define MAX_GPTIMER_ID		12

 u32 sys_timer_reserved;

 /* Clockevent code */

 static struct omap_dm_timer clkev;
 static struct clock_event_device clockevent_gpt;
 static u8 __initdata gptimer_id = 1;
 static u8 __initdata inited;

 static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
 {
 	struct clock_event_device *evt = &clockevent_gpt;

 	__omap_dm_timer_write_status(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);

 	evt->event_handler(evt);
 	return IRQ_HANDLED;
 }

 static struct irqaction omap2_gp_timer_irq = {
 	.name		= "gp timer",
 	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 	.handler	= omap2_gp_timer_interrupt,
 };

 static int omap2_gp_timer_set_next_event(unsigned long cycles,
 					 struct clock_event_device *evt)
 {
 	__omap_dm_timer_load_start(clkev.io_base, OMAP_TIMER_CTRL_ST,
 						0xffffffff - cycles, 1);

 	return 0;
 }

 static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
 				    struct clock_event_device *evt)
 {
 	u32 period;

 	__omap_dm_timer_stop(clkev.io_base, 1, clkev.rate);

 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
 		period = clkev.rate / HZ;
 		period -= 1;
 		/* Looks like we need to first set the load value separately */
 		__omap_dm_timer_write(clkev.io_base, OMAP_TIMER_LOAD_REG,
 					0xffffffff - period, 1);
 		__omap_dm_timer_load_start(clkev.io_base,
 					OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
 						0xffffffff - period, 1);
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
 		break;
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
 	}
 }

 static struct clock_event_device clockevent_gpt = {
 	.name		= "gp timer",
 	.features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 	.shift		= 32,
 	.set_next_event	= omap2_gp_timer_set_next_event,
 	.set_mode	= omap2_gp_timer_set_mode,
 };

 /**
  * omap2_gp_clockevent_set_gptimer - set which GPTIMER is used for clockevents
  * @id: GPTIMER to use (1..MAX_GPTIMER_ID)
  *
  * Define the GPTIMER that the system should use for the tick timer.
  * Meant to be called from board-*.c files in the event that GPTIMER1, the
  * default, is unsuitable.  Returns -EINVAL on error or 0 on success.
  */
 int __init omap2_gp_clockevent_set_gptimer(u8 id)
 {
 	if (id < 1 || id > MAX_GPTIMER_ID)
 		return -EINVAL;

 	BUG_ON(inited);

 	gptimer_id = id;

 	return 0;
 }

 static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 						int gptimer_id,
 						const char *fck_source)
 {
 	char name[10]; /* 10 = sizeof("gptXX_Xck0") */
 	struct omap_hwmod *oh;
 	size_t size;
 	int res = 0;

 	sprintf(name, "timer%d", gptimer_id);
 	omap_hwmod_setup_one(name);
 	oh = omap_hwmod_lookup(name);
 	if (!oh)
 		return -ENODEV;

 	timer->irq = oh->mpu_irqs[0].irq;
 	timer->phys_base = oh->slaves[0]->addr->pa_start;
 	size = oh->slaves[0]->addr->pa_end - timer->phys_base;

 	/* Static mapping, never released */
 	timer->io_base = ioremap(timer->phys_base, size);
 	if (!timer->io_base)
 		return -ENXIO;

 	/* After the dmtimer is using hwmod these clocks won't be needed */
 	sprintf(name, "gpt%d_fck", gptimer_id);
 	timer->fclk = clk_get(NULL, name);
 	if (IS_ERR(timer->fclk))
 		return -ENODEV;

 	sprintf(name, "gpt%d_ick", gptimer_id);
 	timer->iclk = clk_get(NULL, name);
 	if (IS_ERR(timer->iclk)) {
 		clk_put(timer->fclk);
 		return -ENODEV;
 	}

 	omap_hwmod_enable(oh);

 	sys_timer_reserved |= (1 << (gptimer_id - 1));

 	if (gptimer_id != 12) {
 		struct clk *src;

 		src = clk_get(NULL, fck_source);
 		if (IS_ERR(src)) {
 			res = -EINVAL;
 		} else {
 			res = __omap_dm_timer_set_source(timer->fclk, src);
 			if (IS_ERR_VALUE(res))
 				pr_warning("%s: timer%i cannot set source\n",
 						__func__, gptimer_id);
 			clk_put(src);
 		}
 	}
 	__omap_dm_timer_reset(timer->io_base, 1, 1);
 	timer->posted = 1;

 	timer->rate = clk_get_rate(timer->fclk);

 	timer->reserved = 1;

 	return res;
 }

 static void __init omap2_gp_clockevent_init(int gptimer_id,
 						const char *fck_source)
 {
 	int res;

 	inited = 1;

 	res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
 	BUG_ON(res);

 	omap2_gp_timer_irq.dev_id = (void *)&clkev;
 	setup_irq(clkev.irq, &omap2_gp_timer_irq);

 	__omap_dm_timer_int_enable(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);

 	clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
 				     clockevent_gpt.shift);
 	clockevent_gpt.max_delta_ns =
 		clockevent_delta2ns(0xffffffff, &clockevent_gpt);
 	clockevent_gpt.min_delta_ns =
 		clockevent_delta2ns(3, &clockevent_gpt);
 		/* Timer internal resynch latency. */

 	clockevent_gpt.cpumask = cpumask_of(0);
 	clockevents_register_device(&clockevent_gpt);

 	pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
 		gptimer_id, clkev.rate);
 }

 /* Clocksource code */

 #ifdef CONFIG_OMAP_32K_TIMER
 /*
  * When 32k-timer is enabled, don't use GPTimer for clocksource
  * instead, just leave default clocksource which uses the 32k
  * sync counter.  See clocksource setup in plat-omap/counter_32k.c
  */

 static void __init omap2_gp_clocksource_init(void)
 {
 	omap_init_clocksource_32k();
 }

 #else
 /*
  * clocksource
  */
 static DEFINE_CLOCK_DATA(cd);
 static struct omap_dm_timer *gpt_clocksource;
 static cycle_t clocksource_read_cycles(struct clocksource *cs)
 {
 	return (cycle_t)omap_dm_timer_read_counter(gpt_clocksource);
 }

 static struct clocksource clocksource_gpt = {
 	.name		= "gp timer",
 	.rating		= 300,
 	.read		= clocksource_read_cycles,
 	.mask		= CLOCKSOURCE_MASK(32),
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };

 static void notrace dmtimer_update_sched_clock(void)
 {
 	u32 cyc;

 	cyc = omap_dm_timer_read_counter(gpt_clocksource);

 	update_sched_clock(&cd, cyc, (u32)~0);
 }

 /* Setup free-running counter for clocksource */
 static void __init omap2_gp_clocksource_init(void)
 {
 	static struct omap_dm_timer *gpt;
 	u32 tick_rate;
 	static char err1[] __initdata = KERN_ERR
 		"%s: failed to request dm-timer\n";
 	static char err2[] __initdata = KERN_ERR
 		"%s: can't register clocksource!\n";

 	gpt = omap_dm_timer_request();
 	if (!gpt)
 		printk(err1, clocksource_gpt.name);
 	gpt_clocksource = gpt;

 	omap_dm_timer_set_source(gpt, OMAP_TIMER_SRC_SYS_CLK);
 	tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gpt));

 	omap_dm_timer_set_load_start(gpt, 1, 0);

 	init_sched_clock(&cd, dmtimer_update_sched_clock, 32, tick_rate);

 	if (clocksource_register_hz(&clocksource_gpt, tick_rate))
 		printk(err2, clocksource_gpt.name);
 }
 #endif

 #define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src)			\
 static void __init omap##name##_timer_init(void)			\
 {									\
 	omap2_gp_clockevent_init((clkev_nr), clkev_src);		\
 	omap2_gp_clocksource_init();					\
 }

 #define OMAP_SYS_TIMER(name)						\
 struct sys_timer omap##name##_timer = {					\
 	.init	= omap##name##_timer_init,				\
 };

 #ifdef CONFIG_ARCH_OMAP2
 OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE)
 OMAP_SYS_TIMER(2)
 #endif

 #ifdef CONFIG_ARCH_OMAP3
 OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE)
 OMAP_SYS_TIMER(3)
 OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE)
 OMAP_SYS_TIMER(3_secure)
 #endif

 #ifdef CONFIG_ARCH_OMAP4
 static void __init omap4_timer_init(void)
 {
 #ifdef CONFIG_LOCAL_TIMERS
 	twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_256);
 	BUG_ON(!twd_base);
 #endif
 	omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
 	omap2_gp_clocksource_init();
 }
 OMAP_SYS_TIMER(4)
 #endif
	/*
	* linux/arch/arm/mach-omap2/timer-gp.c
	*
	* OMAP2 GP timer support.
	*
	* Copyright (C) 2009 Nokia Corporation
	*
	* Update to use new clocksource/clockevent layers
	* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
	* Copyright (C) 2007 MontaVista Software, Inc.
	*
	* Original driver:
	* Copyright (C) 2005 Nokia Corporation
	* Author: Paul Mundt <paul.mundt@nokia.com>
	* Juha Yrjölä <juha.yrjola@nokia.com>
	* OMAP Dual-mode timer framework support by Timo Teras
	*
	* Some parts based off of TI's 24xx code:
	*
	* Copyright (C) 2004-2009 Texas Instruments, Inc.
	*
	* Roughly modelled after the OMAP1 MPU timer code.
	* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*/
	#include <linux/init.h>
	#include <linux/time.h>
	#include <linux/interrupt.h>
	#include <linux/err.h>
	#include <linux/clk.h>
	#include <linux/delay.h>
	#include <linux/irq.h>
	#include <linux/clocksource.h>
	#include <linux/clockchips.h>

	#include <asm/mach/time.h>
	#include <plat/dmtimer.h>
	#include <asm/localtimer.h>
	#include <asm/sched_clock.h>
	#include <plat/common.h>
	#include <plat/omap_hwmod.h>

	#include "timer-gp.h"

	/* Parent clocks, eventually these will come from the clock framework */

	#define OMAP2_MPU_SOURCE "sys_ck"
	#define OMAP3_MPU_SOURCE OMAP2_MPU_SOURCE
	#define OMAP4_MPU_SOURCE "sys_clkin_ck"
	#define OMAP2_32K_SOURCE "func_32k_ck"
	#define OMAP3_32K_SOURCE "omap_32k_fck"
	#define OMAP4_32K_SOURCE "sys_32k_ck"

	#ifdef CONFIG_OMAP_32K_TIMER
	#define OMAP2_CLKEV_SOURCE OMAP2_32K_SOURCE
	#define OMAP3_CLKEV_SOURCE OMAP3_32K_SOURCE
	#define OMAP4_CLKEV_SOURCE OMAP4_32K_SOURCE
	#define OMAP3_SECURE_TIMER 12
	#else
	#define OMAP2_CLKEV_SOURCE OMAP2_MPU_SOURCE
	#define OMAP3_CLKEV_SOURCE OMAP3_MPU_SOURCE
	#define OMAP4_CLKEV_SOURCE OMAP4_MPU_SOURCE
	#define OMAP3_SECURE_TIMER 1
	#endif

	/* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
	#define MAX_GPTIMER_ID 12

	u32 sys_timer_reserved;

	/* Clockevent code */

	static struct omap_dm_timer clkev;
	static struct clock_event_device clockevent_gpt;
	static u8 __initdata gptimer_id = 1;
	static u8 __initdata inited;

	static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
	{
	struct clock_event_device *evt = &clockevent_gpt;

	__omap_dm_timer_write_status(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);

	evt->event_handler(evt);
	return IRQ_HANDLED;
	}

	static struct irqaction omap2_gp_timer_irq = {
	.name = "gp timer",
	.flags = IRQF_DISABLED \| IRQF_TIMER \| IRQF_IRQPOLL,
	.handler = omap2_gp_timer_interrupt,
	};

	static int omap2_gp_timer_set_next_event(unsigned long cycles,
	struct clock_event_device *evt)
	{
	__omap_dm_timer_load_start(clkev.io_base, OMAP_TIMER_CTRL_ST,
	0xffffffff - cycles, 1);

	return 0;
	}

	static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
	struct clock_event_device *evt)
	{
	u32 period;

	__omap_dm_timer_stop(clkev.io_base, 1, clkev.rate);

	switch (mode) {
	case CLOCK_EVT_MODE_PERIODIC:
	period = clkev.rate / HZ;
	period -= 1;
	/* Looks like we need to first set the load value separately */
	__omap_dm_timer_write(clkev.io_base, OMAP_TIMER_LOAD_REG,
	0xffffffff - period, 1);
	__omap_dm_timer_load_start(clkev.io_base,
	OMAP_TIMER_CTRL_AR \| OMAP_TIMER_CTRL_ST,
	0xffffffff - period, 1);
	break;
	case CLOCK_EVT_MODE_ONESHOT:
	break;
	case CLOCK_EVT_MODE_UNUSED:
	case CLOCK_EVT_MODE_SHUTDOWN:
	case CLOCK_EVT_MODE_RESUME:
	break;
	}
	}

	static struct clock_event_device clockevent_gpt = {
	.name = "gp timer",
	.features = CLOCK_EVT_FEAT_PERIODIC \| CLOCK_EVT_FEAT_ONESHOT,
	.shift = 32,
	.set_next_event = omap2_gp_timer_set_next_event,
	.set_mode = omap2_gp_timer_set_mode,
	};

	/**
	* omap2_gp_clockevent_set_gptimer - set which GPTIMER is used for clockevents
	* @id: GPTIMER to use (1..MAX_GPTIMER_ID)
	*
	* Define the GPTIMER that the system should use for the tick timer.
	* Meant to be called from board-*.c files in the event that GPTIMER1, the
	* default, is unsuitable. Returns -EINVAL on error or 0 on success.
	*/
	int __init omap2_gp_clockevent_set_gptimer(u8 id)
	{
	if (id < 1 \|\| id > MAX_GPTIMER_ID)
	return -EINVAL;

	BUG_ON(inited);

	gptimer_id = id;

	return 0;
	}

	static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
	int gptimer_id,
	const char *fck_source)
	{
	char name[10]; /* 10 = sizeof("gptXX_Xck0") */
	struct omap_hwmod *oh;
	size_t size;
	int res = 0;

	sprintf(name, "timer%d", gptimer_id);
	omap_hwmod_setup_one(name);
	oh = omap_hwmod_lookup(name);
	if (!oh)
	return -ENODEV;

	timer->irq = oh->mpu_irqs[0].irq;
	timer->phys_base = oh->slaves[0]->addr->pa_start;
	size = oh->slaves[0]->addr->pa_end - timer->phys_base;

	/* Static mapping, never released */
	timer->io_base = ioremap(timer->phys_base, size);
	if (!timer->io_base)
	return -ENXIO;

	/* After the dmtimer is using hwmod these clocks won't be needed */
	sprintf(name, "gpt%d_fck", gptimer_id);
	timer->fclk = clk_get(NULL, name);
	if (IS_ERR(timer->fclk))
	return -ENODEV;

	sprintf(name, "gpt%d_ick", gptimer_id);
	timer->iclk = clk_get(NULL, name);
	if (IS_ERR(timer->iclk)) {
	clk_put(timer->fclk);
	return -ENODEV;
	}

	omap_hwmod_enable(oh);

	sys_timer_reserved \|= (1 << (gptimer_id - 1));

	if (gptimer_id != 12) {
	struct clk *src;

	src = clk_get(NULL, fck_source);
	if (IS_ERR(src)) {
	res = -EINVAL;
	} else {
	res = __omap_dm_timer_set_source(timer->fclk, src);
	if (IS_ERR_VALUE(res))
	pr_warning("%s: timer%i cannot set source\n",
	__func__, gptimer_id);
	clk_put(src);
	}
	}
	__omap_dm_timer_reset(timer->io_base, 1, 1);
	timer->posted = 1;

	timer->rate = clk_get_rate(timer->fclk);

	timer->reserved = 1;

	return res;
	}

	static void __init omap2_gp_clockevent_init(int gptimer_id,
	const char *fck_source)
	{
	int res;

	inited = 1;

	res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
	BUG_ON(res);

	omap2_gp_timer_irq.dev_id = (void *)&clkev;
	setup_irq(clkev.irq, &omap2_gp_timer_irq);

	__omap_dm_timer_int_enable(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);

	clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
	clockevent_gpt.shift);
	clockevent_gpt.max_delta_ns =
	clockevent_delta2ns(0xffffffff, &clockevent_gpt);
	clockevent_gpt.min_delta_ns =
	clockevent_delta2ns(3, &clockevent_gpt);
	/* Timer internal resynch latency. */

	clockevent_gpt.cpumask = cpumask_of(0);
	clockevents_register_device(&clockevent_gpt);

	pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
	gptimer_id, clkev.rate);
	}

	/* Clocksource code */

	#ifdef CONFIG_OMAP_32K_TIMER
	/*
	* When 32k-timer is enabled, don't use GPTimer for clocksource
	* instead, just leave default clocksource which uses the 32k
	* sync counter. See clocksource setup in plat-omap/counter_32k.c
	*/

	static void __init omap2_gp_clocksource_init(void)
	{
	omap_init_clocksource_32k();
	}

	#else
	/*
	* clocksource
	*/
	static DEFINE_CLOCK_DATA(cd);
	static struct omap_dm_timer *gpt_clocksource;
	static cycle_t clocksource_read_cycles(struct clocksource *cs)
	{
	return (cycle_t)omap_dm_timer_read_counter(gpt_clocksource);
	}

	static struct clocksource clocksource_gpt = {
	.name = "gp timer",
	.rating = 300,
	.read = clocksource_read_cycles,
	.mask = CLOCKSOURCE_MASK(32),
	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
	};

	static void notrace dmtimer_update_sched_clock(void)
	{
	u32 cyc;

	cyc = omap_dm_timer_read_counter(gpt_clocksource);

	update_sched_clock(&cd, cyc, (u32)~0);
	}

	/* Setup free-running counter for clocksource */
	static void __init omap2_gp_clocksource_init(void)
	{
	static struct omap_dm_timer *gpt;
	u32 tick_rate;
	static char err1[] __initdata = KERN_ERR
	"%s: failed to request dm-timer\n";
	static char err2[] __initdata = KERN_ERR
	"%s: can't register clocksource!\n";

	gpt = omap_dm_timer_request();
	if (!gpt)
	printk(err1, clocksource_gpt.name);
	gpt_clocksource = gpt;

	omap_dm_timer_set_source(gpt, OMAP_TIMER_SRC_SYS_CLK);
	tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gpt));

	omap_dm_timer_set_load_start(gpt, 1, 0);

	init_sched_clock(&cd, dmtimer_update_sched_clock, 32, tick_rate);

	if (clocksource_register_hz(&clocksource_gpt, tick_rate))
	printk(err2, clocksource_gpt.name);
	}
	#endif

	#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src) \
	static void __init omap##name##_timer_init(void) \
	{ \
	omap2_gp_clockevent_init((clkev_nr), clkev_src); \
	omap2_gp_clocksource_init(); \
	}

	#define OMAP_SYS_TIMER(name) \
	struct sys_timer omap##name##_timer = { \
	.init = omap##name##_timer_init, \
	};

	#ifdef CONFIG_ARCH_OMAP2
	OMAP_SYS_TIMER_INIT(2, 1, OMAP2_CLKEV_SOURCE)
	OMAP_SYS_TIMER(2)
	#endif

	#ifdef CONFIG_ARCH_OMAP3
	OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE)
	OMAP_SYS_TIMER(3)
	OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE)
	OMAP_SYS_TIMER(3_secure)
	#endif

	#ifdef CONFIG_ARCH_OMAP4
	static void __init omap4_timer_init(void)
	{
	#ifdef CONFIG_LOCAL_TIMERS
	twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_256);
	BUG_ON(!twd_base);
	#endif
	omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
	omap2_gp_clocksource_init();
	}
	OMAP_SYS_TIMER(4)
	#endif