From 5cdb1497ccc5b9dae8795e1e5e9c74f11e4e7401 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Tue, 29 Mar 2011 15:54:50 -0700
Subject: [PATCH 016/149] omap2+: Rename timer-gp.c into timer.c to combine timer init functions

We can keep everything sys_timer and gptimer.c related code in
timer.c as the code will be very minimal.

Later on we can also remove timer-mpu.c, as it can be called from
omap4_timer_init function.

This allows us to get rid of confusing existing files. We currently
have timer-gp.c, timer-mpu.c, and patches have been posted to add
dmtimer.c. There's no need to have these multiple files, we can
put everything into timer.c.

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/mach-omap2/Makefile   |    2 +-
 arch/arm/mach-omap2/timer-gp.c |  342 ----------------------------------------
 arch/arm/mach-omap2/timer.c    |  342 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 343 insertions(+), 343 deletions(-)
 delete mode 100644 arch/arm/mach-omap2/timer-gp.c
 create mode 100644 arch/arm/mach-omap2/timer.c

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b148077..adbe82d 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -3,7 +3,7 @@
 #
 
 # Common support
-obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o pm.o \
+obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer.o pm.o \
 	 common.o gpio.o dma.o wd_timer.o
 
 omap-2-3-common				= irq.o sdrc.o
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
deleted file mode 100644
index ab1931c..0000000
--- a/arch/arm/mach-omap2/timer-gp.c
+++ /dev/null
@@ -1,342 +0,0 @@
-/*
- * 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>
-
-/* 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 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,
-};
-
-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;
-
-	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(int unused, const char *dummy)
-{
-	omap_init_clocksource_32k();
-}
-
-#else
-
-static struct omap_dm_timer clksrc;
-
-/*
- * clocksource
- */
-static DEFINE_CLOCK_DATA(cd);
-static cycle_t clocksource_read_cycles(struct clocksource *cs)
-{
-	return (cycle_t)__omap_dm_timer_read_counter(clksrc.io_base, 1);
-}
-
-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(clksrc.io_base, 1);
-
-	update_sched_clock(&cd, cyc, (u32)~0);
-}
-
-unsigned long long notrace sched_clock(void)
-{
-	u32 cyc = 0;
-
-	if (clksrc.reserved)
-		cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
-
-	return cyc_to_sched_clock(&cd, cyc, (u32)~0);
-}
-
-/* Setup free-running counter for clocksource */
-static void __init omap2_gp_clocksource_init(int gptimer_id,
-						const char *fck_source)
-{
-	int res;
-
-	res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source);
-	BUG_ON(res);
-
-	pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
-		gptimer_id, clksrc.rate);
-
-	__omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1);
-	init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
-
-	if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
-		pr_err("Could not register clocksource %s\n",
-			clocksource_gpt.name);
-}
-#endif
-
-#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src,			\
-				clksrc_nr, clksrc_src)			\
-static void __init omap##name##_timer_init(void)			\
-{									\
-	omap2_gp_clockevent_init((clkev_nr), clkev_src);		\
-	omap2_gp_clocksource_init((clksrc_nr), clksrc_src);		\
-}
-
-#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, 2, OMAP2_MPU_SOURCE)
-OMAP_SYS_TIMER(2)
-#endif
-
-#ifdef CONFIG_ARCH_OMAP3
-OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE, 2, OMAP3_MPU_SOURCE)
-OMAP_SYS_TIMER(3)
-OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
-			2, OMAP3_MPU_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(2, OMAP4_MPU_SOURCE);
-}
-OMAP_SYS_TIMER(4)
-#endif
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
new file mode 100644
index 0000000..e964072
--- /dev/null
+++ b/arch/arm/mach-omap2/timer.c
@@ -0,0 +1,342 @@
+/*
+ * linux/arch/arm/mach-omap2/timer.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>
+
+/* 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 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,
+};
+
+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;
+
+	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(int unused, const char *dummy)
+{
+	omap_init_clocksource_32k();
+}
+
+#else
+
+static struct omap_dm_timer clksrc;
+
+/*
+ * clocksource
+ */
+static DEFINE_CLOCK_DATA(cd);
+static cycle_t clocksource_read_cycles(struct clocksource *cs)
+{
+	return (cycle_t)__omap_dm_timer_read_counter(clksrc.io_base, 1);
+}
+
+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(clksrc.io_base, 1);
+
+	update_sched_clock(&cd, cyc, (u32)~0);
+}
+
+unsigned long long notrace sched_clock(void)
+{
+	u32 cyc = 0;
+
+	if (clksrc.reserved)
+		cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
+
+	return cyc_to_sched_clock(&cd, cyc, (u32)~0);
+}
+
+/* Setup free-running counter for clocksource */
+static void __init omap2_gp_clocksource_init(int gptimer_id,
+						const char *fck_source)
+{
+	int res;
+
+	res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source);
+	BUG_ON(res);
+
+	pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
+		gptimer_id, clksrc.rate);
+
+	__omap_dm_timer_load_start(clksrc.io_base, OMAP_TIMER_CTRL_ST, 0, 1);
+	init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
+
+	if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
+		pr_err("Could not register clocksource %s\n",
+			clocksource_gpt.name);
+}
+#endif
+
+#define OMAP_SYS_TIMER_INIT(name, clkev_nr, clkev_src,			\
+				clksrc_nr, clksrc_src)			\
+static void __init omap##name##_timer_init(void)			\
+{									\
+	omap2_gp_clockevent_init((clkev_nr), clkev_src);		\
+	omap2_gp_clocksource_init((clksrc_nr), clksrc_src);		\
+}
+
+#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, 2, OMAP2_MPU_SOURCE)
+OMAP_SYS_TIMER(2)
+#endif
+
+#ifdef CONFIG_ARCH_OMAP3
+OMAP_SYS_TIMER_INIT(3, 1, OMAP3_CLKEV_SOURCE, 2, OMAP3_MPU_SOURCE)
+OMAP_SYS_TIMER(3)
+OMAP_SYS_TIMER_INIT(3_secure, OMAP3_SECURE_TIMER, OMAP3_CLKEV_SOURCE,
+			2, OMAP3_MPU_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(2, OMAP4_MPU_SOURCE);
+}
+OMAP_SYS_TIMER(4)
+#endif
-- 
1.7.2.5

