Merge branch 'devel-timer' into devel-cleanup

5 files changed, 283 insertions, 190 deletions

diff --git a/arch/arm/plat-omap/counter_32k.c b/arch/arm/plat-omap/counter_32k.c
index f7fed6080190..c13bc3d3eb2c 100644
--- a/arch/arm/plat-omap/counter_32k.c
+++ b/arch/arm/plat-omap/counter_32k.c
@@ -126,7 +126,7 @@ static inline unsigned long long notrace _omap_32k_sched_clock(void)
 	return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT);
 }
 
-#ifndef CONFIG_OMAP_MPU_TIMER
+#if defined(CONFIG_OMAP_32K_TIMER) && !defined(CONFIG_OMAP_MPU_TIMER)
 unsigned long long notrace sched_clock(void)
 {
 	return _omap_32k_sched_clock();
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index ee9f6ebba29b..8dfb8186b2c2 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -41,127 +41,6 @@
 #include <plat/dmtimer.h>
 #include <mach/irqs.h>
 
-/* register offsets */
-#define _OMAP_TIMER_ID_OFFSET		0x00
-#define _OMAP_TIMER_OCP_CFG_OFFSET	0x10
-#define _OMAP_TIMER_SYS_STAT_OFFSET	0x14
-#define _OMAP_TIMER_STAT_OFFSET		0x18
-#define _OMAP_TIMER_INT_EN_OFFSET	0x1c
-#define _OMAP_TIMER_WAKEUP_EN_OFFSET	0x20
-#define _OMAP_TIMER_CTRL_OFFSET		0x24
-#define		OMAP_TIMER_CTRL_GPOCFG		(1 << 14)
-#define		OMAP_TIMER_CTRL_CAPTMODE	(1 << 13)
-#define		OMAP_TIMER_CTRL_PT		(1 << 12)
-#define		OMAP_TIMER_CTRL_TCM_LOWTOHIGH	(0x1 << 8)
-#define		OMAP_TIMER_CTRL_TCM_HIGHTOLOW	(0x2 << 8)
-#define		OMAP_TIMER_CTRL_TCM_BOTHEDGES	(0x3 << 8)
-#define		OMAP_TIMER_CTRL_SCPWM		(1 << 7)
-#define		OMAP_TIMER_CTRL_CE		(1 << 6) /* compare enable */
-#define		OMAP_TIMER_CTRL_PRE		(1 << 5) /* prescaler enable */
-#define		OMAP_TIMER_CTRL_PTV_SHIFT	2 /* prescaler value shift */
-#define		OMAP_TIMER_CTRL_POSTED		(1 << 2)
-#define		OMAP_TIMER_CTRL_AR		(1 << 1) /* auto-reload enable */
-#define		OMAP_TIMER_CTRL_ST		(1 << 0) /* start timer */
-#define _OMAP_TIMER_COUNTER_OFFSET	0x28
-#define _OMAP_TIMER_LOAD_OFFSET		0x2c
-#define _OMAP_TIMER_TRIGGER_OFFSET	0x30
-#define _OMAP_TIMER_WRITE_PEND_OFFSET	0x34
-#define		WP_NONE			0	/* no write pending bit */
-#define		WP_TCLR			(1 << 0)
-#define		WP_TCRR			(1 << 1)
-#define		WP_TLDR			(1 << 2)
-#define		WP_TTGR			(1 << 3)
-#define		WP_TMAR			(1 << 4)
-#define		WP_TPIR			(1 << 5)
-#define		WP_TNIR			(1 << 6)
-#define		WP_TCVR			(1 << 7)
-#define		WP_TOCR			(1 << 8)
-#define		WP_TOWR			(1 << 9)
-#define _OMAP_TIMER_MATCH_OFFSET	0x38
-#define _OMAP_TIMER_CAPTURE_OFFSET	0x3c
-#define _OMAP_TIMER_IF_CTRL_OFFSET	0x40
-#define _OMAP_TIMER_CAPTURE2_OFFSET		0x44	/* TCAR2, 34xx only */
-#define _OMAP_TIMER_TICK_POS_OFFSET		0x48	/* TPIR, 34xx only */
-#define _OMAP_TIMER_TICK_NEG_OFFSET		0x4c	/* TNIR, 34xx only */
-#define _OMAP_TIMER_TICK_COUNT_OFFSET		0x50	/* TCVR, 34xx only */
-#define _OMAP_TIMER_TICK_INT_MASK_SET_OFFSET	0x54	/* TOCR, 34xx only */
-#define _OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET	0x58	/* TOWR, 34xx only */
-
-/* register offsets with the write pending bit encoded */
-#define	WPSHIFT					16
-
-#define OMAP_TIMER_ID_REG			(_OMAP_TIMER_ID_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_OCP_CFG_REG			(_OMAP_TIMER_OCP_CFG_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_SYS_STAT_REG			(_OMAP_TIMER_SYS_STAT_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_STAT_REG			(_OMAP_TIMER_STAT_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_INT_EN_REG			(_OMAP_TIMER_INT_EN_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_WAKEUP_EN_REG		(_OMAP_TIMER_WAKEUP_EN_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_CTRL_REG			(_OMAP_TIMER_CTRL_OFFSET \
-							| (WP_TCLR << WPSHIFT))
-
-#define OMAP_TIMER_COUNTER_REG			(_OMAP_TIMER_COUNTER_OFFSET \
-							| (WP_TCRR << WPSHIFT))
-
-#define OMAP_TIMER_LOAD_REG			(_OMAP_TIMER_LOAD_OFFSET \
-							| (WP_TLDR << WPSHIFT))
-
-#define OMAP_TIMER_TRIGGER_REG			(_OMAP_TIMER_TRIGGER_OFFSET \
-							| (WP_TTGR << WPSHIFT))
-
-#define OMAP_TIMER_WRITE_PEND_REG		(_OMAP_TIMER_WRITE_PEND_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_MATCH_REG			(_OMAP_TIMER_MATCH_OFFSET \
-							| (WP_TMAR << WPSHIFT))
-
-#define OMAP_TIMER_CAPTURE_REG			(_OMAP_TIMER_CAPTURE_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_IF_CTRL_REG			(_OMAP_TIMER_IF_CTRL_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_CAPTURE2_REG			(_OMAP_TIMER_CAPTURE2_OFFSET \
-							| (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_TICK_POS_REG			(_OMAP_TIMER_TICK_POS_OFFSET \
-							| (WP_TPIR << WPSHIFT))
-
-#define OMAP_TIMER_TICK_NEG_REG			(_OMAP_TIMER_TICK_NEG_OFFSET \
-							| (WP_TNIR << WPSHIFT))
-
-#define OMAP_TIMER_TICK_COUNT_REG		(_OMAP_TIMER_TICK_COUNT_OFFSET \
-							| (WP_TCVR << WPSHIFT))
-
-#define OMAP_TIMER_TICK_INT_MASK_SET_REG				\
-		(_OMAP_TIMER_TICK_INT_MASK_SET_OFFSET | (WP_TOCR << WPSHIFT))
-
-#define OMAP_TIMER_TICK_INT_MASK_COUNT_REG				\
-		(_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT))
-
-struct omap_dm_timer {
-	unsigned long phys_base;
-	int irq;
-#ifdef CONFIG_ARCH_OMAP2PLUS
-	struct clk *iclk, *fclk;
-#endif
-	void __iomem *io_base;
-	unsigned reserved:1;
-	unsigned enabled:1;
-	unsigned posted:1;
-};
-
 static int dm_timer_count;
 
 #ifdef CONFIG_ARCH_OMAP1
@@ -291,11 +170,7 @@ static spinlock_t dm_timer_lock;
  */
 static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
 {
-	if (timer->posted)
-		while (readl(timer->io_base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
-				& (reg >> WPSHIFT))
-			cpu_relax();
-	return readl(timer->io_base + (reg & 0xff));
+	return __omap_dm_timer_read(timer->io_base, reg, timer->posted);
 }
 
 /*
@@ -307,11 +182,7 @@ static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
 static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
 						u32 value)
 {
-	if (timer->posted)
-		while (readl(timer->io_base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
-				& (reg >> WPSHIFT))
-			cpu_relax();
-	writel(value, timer->io_base + (reg & 0xff));
+	__omap_dm_timer_write(timer->io_base, reg, value, timer->posted);
 }
 
 static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
@@ -330,7 +201,7 @@ static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
 
 static void omap_dm_timer_reset(struct omap_dm_timer *timer)
 {
-	u32 l;
+	int autoidle = 0, wakeup = 0;
 
 	if (!cpu_class_is_omap2() || timer != &dm_timers[0]) {
 		omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
@@ -338,28 +209,21 @@ static void omap_dm_timer_reset(struct omap_dm_timer *timer)
 	}
 	omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
 
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG);
-	l |= 0x02 << 3;  /* Set to smart-idle mode */
-	l |= 0x2 << 8;   /* Set clock activity to perserve f-clock on idle */
-
 	/* Enable autoidle on OMAP2 / OMAP3 */
 	if (cpu_is_omap24xx() || cpu_is_omap34xx())
-		l |= 0x1 << 0;
+		autoidle = 1;
 
 	/*
 	 * Enable wake-up on OMAP2 CPUs.
 	 */
 	if (cpu_class_is_omap2())
-		l |= 1 << 2;
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l);
+		wakeup = 1;
 
-	/* Match hardware reset default of posted mode */
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG,
-			OMAP_TIMER_CTRL_POSTED);
+	__omap_dm_timer_reset(timer->io_base, autoidle, wakeup);
 	timer->posted = 1;
 }
 
-static void omap_dm_timer_prepare(struct omap_dm_timer *timer)
+void omap_dm_timer_prepare(struct omap_dm_timer *timer)
 {
 	omap_dm_timer_enable(timer);
 	omap_dm_timer_reset(timer);
@@ -531,25 +395,13 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_start);
 
 void omap_dm_timer_stop(struct omap_dm_timer *timer)
 {
-	u32 l;
+	unsigned long rate = 0;
 
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-	if (l & OMAP_TIMER_CTRL_ST) {
-		l &= ~0x1;
-		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 #ifdef CONFIG_ARCH_OMAP2PLUS
-		/* Readback to make sure write has completed */
-		omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
-		 /*
-		  * Wait for functional clock period x 3.5 to make sure that
-		  * timer is stopped
-		  */
-		udelay(3500000 / clk_get_rate(timer->fclk) + 1);
+	rate = clk_get_rate(timer->fclk);
 #endif
-	}
-	/* Ack possibly pending interrupt */
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG,
-			OMAP_TIMER_INT_OVERFLOW);
+
+	__omap_dm_timer_stop(timer->io_base, timer->posted, rate);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_stop);
 
@@ -572,22 +424,11 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
 
 int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 {
-	int ret = -EINVAL;
-
 	if (source < 0 || source >= 3)
 		return -EINVAL;
 
-	clk_disable(timer->fclk);
-	ret = clk_set_parent(timer->fclk, dm_source_clocks[source]);
-	clk_enable(timer->fclk);
-
-	/*
-	 * When the functional clock disappears, too quick writes seem
-	 * to cause an abort. XXX Is this still necessary?
-	 */
-	__delay(300000);
-
-	return ret;
+	return __omap_dm_timer_set_source(timer->fclk,
+						dm_source_clocks[source]);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
 
@@ -625,8 +466,7 @@ void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
 	}
 	l |= OMAP_TIMER_CTRL_ST;
 
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, load);
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+	__omap_dm_timer_load_start(timer->io_base, l, load, timer->posted);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
 
@@ -679,8 +519,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler);
 void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
 				  unsigned int value)
 {
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value);
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, value);
+	__omap_dm_timer_int_enable(timer->io_base, value);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable);
 
@@ -696,17 +535,13 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
 
 void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 {
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value);
+	__omap_dm_timer_write_status(timer->io_base, value);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
 
 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 {
-	unsigned int l;
-
-	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG);
-
-	return l;
+	return __omap_dm_timer_read_counter(timer->io_base, timer->posted);
 }
 EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
 
@@ -737,7 +572,7 @@ int omap_dm_timers_active(void)
 }
 EXPORT_SYMBOL_GPL(omap_dm_timers_active);
 
-int __init omap_dm_timer_init(void)
+static int __init omap_dm_timer_init(void)
 {
 	struct omap_dm_timer *timer;
 	int i, map_size = SZ_8K;	/* Module 4KB + L4 4KB except on omap1 */
@@ -790,8 +625,16 @@ int __init omap_dm_timer_init(void)
 			sprintf(clk_name, "gpt%d_fck", i + 1);
 			timer->fclk = clk_get(NULL, clk_name);
 		}
+
+		/* One or two timers may be set up early for sys_timer */
+		if (sys_timer_reserved & (1  << i)) {
+			timer->reserved = 1;
+			timer->posted = 1;
+		}
 #endif
 	}
 
 	return 0;
 }
+
+arch_initcall(omap_dm_timer_init);
diff --git a/arch/arm/plat-omap/include/plat/common.h b/arch/arm/plat-omap/include/plat/common.h
index 5288130be96e..4564cc697d7f 100644
--- a/arch/arm/plat-omap/include/plat/common.h
+++ b/arch/arm/plat-omap/include/plat/common.h
@@ -34,7 +34,11 @@
 struct sys_timer;
 
 extern void omap_map_common_io(void);
-extern struct sys_timer omap_timer;
+extern struct sys_timer omap1_timer;
+extern struct sys_timer omap2_timer;
+extern struct sys_timer omap3_timer;
+extern struct sys_timer omap3_secure_timer;
+extern struct sys_timer omap4_timer;
 extern bool omap_32k_timer_init(void);
 extern int __init omap_init_clocksource_32k(void);
 extern unsigned long long notrace omap_32k_sched_clock(void);
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index d6c70d2f4030..d0f3a2d22fd3 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -32,6 +32,9 @@
  * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <linux/clk.h>
+#include <linux/delay.h>
+
 #ifndef __ASM_ARCH_DMTIMER_H
 #define __ASM_ARCH_DMTIMER_H
 
@@ -56,12 +59,8 @@
  */
 #define OMAP_TIMER_IP_VERSION_1                        0x1
 struct omap_dm_timer;
-extern struct omap_dm_timer *gptimer_wakeup;
-extern struct sys_timer omap_timer;
 struct clk;
 
-int omap_dm_timer_init(void);
-
 struct omap_dm_timer *omap_dm_timer_request(void);
 struct omap_dm_timer *omap_dm_timer_request_specific(int timer_id);
 void omap_dm_timer_free(struct omap_dm_timer *timer);
@@ -93,5 +92,248 @@ void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value
 
 int omap_dm_timers_active(void);
 
+/*
+ * Do not use the defines below, they are not needed. They should be only
+ * used by dmtimer.c and sys_timer related code.
+ */
+
+/* register offsets */
+#define _OMAP_TIMER_ID_OFFSET		0x00
+#define _OMAP_TIMER_OCP_CFG_OFFSET	0x10
+#define _OMAP_TIMER_SYS_STAT_OFFSET	0x14
+#define _OMAP_TIMER_STAT_OFFSET		0x18
+#define _OMAP_TIMER_INT_EN_OFFSET	0x1c
+#define _OMAP_TIMER_WAKEUP_EN_OFFSET	0x20
+#define _OMAP_TIMER_CTRL_OFFSET		0x24
+#define		OMAP_TIMER_CTRL_GPOCFG		(1 << 14)
+#define		OMAP_TIMER_CTRL_CAPTMODE	(1 << 13)
+#define		OMAP_TIMER_CTRL_PT		(1 << 12)
+#define		OMAP_TIMER_CTRL_TCM_LOWTOHIGH	(0x1 << 8)
+#define		OMAP_TIMER_CTRL_TCM_HIGHTOLOW	(0x2 << 8)
+#define		OMAP_TIMER_CTRL_TCM_BOTHEDGES	(0x3 << 8)
+#define		OMAP_TIMER_CTRL_SCPWM		(1 << 7)
+#define		OMAP_TIMER_CTRL_CE		(1 << 6) /* compare enable */
+#define		OMAP_TIMER_CTRL_PRE		(1 << 5) /* prescaler enable */
+#define		OMAP_TIMER_CTRL_PTV_SHIFT	2 /* prescaler value shift */
+#define		OMAP_TIMER_CTRL_POSTED		(1 << 2)
+#define		OMAP_TIMER_CTRL_AR		(1 << 1) /* auto-reload enable */
+#define		OMAP_TIMER_CTRL_ST		(1 << 0) /* start timer */
+#define _OMAP_TIMER_COUNTER_OFFSET	0x28
+#define _OMAP_TIMER_LOAD_OFFSET		0x2c
+#define _OMAP_TIMER_TRIGGER_OFFSET	0x30
+#define _OMAP_TIMER_WRITE_PEND_OFFSET	0x34
+#define		WP_NONE			0	/* no write pending bit */
+#define		WP_TCLR			(1 << 0)
+#define		WP_TCRR			(1 << 1)
+#define		WP_TLDR			(1 << 2)
+#define		WP_TTGR			(1 << 3)
+#define		WP_TMAR			(1 << 4)
+#define		WP_TPIR			(1 << 5)
+#define		WP_TNIR			(1 << 6)
+#define		WP_TCVR			(1 << 7)
+#define		WP_TOCR			(1 << 8)
+#define		WP_TOWR			(1 << 9)
+#define _OMAP_TIMER_MATCH_OFFSET	0x38
+#define _OMAP_TIMER_CAPTURE_OFFSET	0x3c
+#define _OMAP_TIMER_IF_CTRL_OFFSET	0x40
+#define _OMAP_TIMER_CAPTURE2_OFFSET		0x44	/* TCAR2, 34xx only */
+#define _OMAP_TIMER_TICK_POS_OFFSET		0x48	/* TPIR, 34xx only */
+#define _OMAP_TIMER_TICK_NEG_OFFSET		0x4c	/* TNIR, 34xx only */
+#define _OMAP_TIMER_TICK_COUNT_OFFSET		0x50	/* TCVR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_SET_OFFSET	0x54	/* TOCR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET	0x58	/* TOWR, 34xx only */
+
+/* register offsets with the write pending bit encoded */
+#define	WPSHIFT					16
+
+#define OMAP_TIMER_ID_REG			(_OMAP_TIMER_ID_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_OCP_CFG_REG			(_OMAP_TIMER_OCP_CFG_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_SYS_STAT_REG			(_OMAP_TIMER_SYS_STAT_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_STAT_REG			(_OMAP_TIMER_STAT_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_INT_EN_REG			(_OMAP_TIMER_INT_EN_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_WAKEUP_EN_REG		(_OMAP_TIMER_WAKEUP_EN_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CTRL_REG			(_OMAP_TIMER_CTRL_OFFSET \
+							| (WP_TCLR << WPSHIFT))
+
+#define OMAP_TIMER_COUNTER_REG			(_OMAP_TIMER_COUNTER_OFFSET \
+							| (WP_TCRR << WPSHIFT))
+
+#define OMAP_TIMER_LOAD_REG			(_OMAP_TIMER_LOAD_OFFSET \
+							| (WP_TLDR << WPSHIFT))
+
+#define OMAP_TIMER_TRIGGER_REG			(_OMAP_TIMER_TRIGGER_OFFSET \
+							| (WP_TTGR << WPSHIFT))
+
+#define OMAP_TIMER_WRITE_PEND_REG		(_OMAP_TIMER_WRITE_PEND_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_MATCH_REG			(_OMAP_TIMER_MATCH_OFFSET \
+							| (WP_TMAR << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE_REG			(_OMAP_TIMER_CAPTURE_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_IF_CTRL_REG			(_OMAP_TIMER_IF_CTRL_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE2_REG			(_OMAP_TIMER_CAPTURE2_OFFSET \
+							| (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_TICK_POS_REG			(_OMAP_TIMER_TICK_POS_OFFSET \
+							| (WP_TPIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_NEG_REG			(_OMAP_TIMER_TICK_NEG_OFFSET \
+							| (WP_TNIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_COUNT_REG		(_OMAP_TIMER_TICK_COUNT_OFFSET \
+							| (WP_TCVR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_SET_REG				\
+		(_OMAP_TIMER_TICK_INT_MASK_SET_OFFSET | (WP_TOCR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_COUNT_REG				\
+		(_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT))
+
+struct omap_dm_timer {
+	unsigned long phys_base;
+	int irq;
+#ifdef CONFIG_ARCH_OMAP2PLUS
+	struct clk *iclk, *fclk;
+#endif
+	void __iomem *io_base;
+	unsigned long rate;
+	unsigned reserved:1;
+	unsigned enabled:1;
+	unsigned posted:1;
+};
+
+extern u32 sys_timer_reserved;
+void omap_dm_timer_prepare(struct omap_dm_timer *timer);
+
+static inline u32 __omap_dm_timer_read(void __iomem *base, u32 reg,
+						int posted)
+{
+	if (posted)
+		while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
+				& (reg >> WPSHIFT))
+			cpu_relax();
+
+	return __raw_readl(base + (reg & 0xff));
+}
+
+static inline void __omap_dm_timer_write(void __iomem *base, u32 reg, u32 val,
+						int posted)
+{
+	if (posted)
+		while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
+				& (reg >> WPSHIFT))
+			cpu_relax();
+
+	__raw_writel(val, base + (reg & 0xff));
+}
+
+/* Assumes the source clock has been set by caller */
+static inline void __omap_dm_timer_reset(void __iomem *base, int autoidle,
+						int wakeup)
+{
+	u32 l;
+
+	l = __omap_dm_timer_read(base, OMAP_TIMER_OCP_CFG_REG, 0);
+	l |= 0x02 << 3;  /* Set to smart-idle mode */
+	l |= 0x2 << 8;   /* Set clock activity to perserve f-clock on idle */
+
+	if (autoidle)
+		l |= 0x1 << 0;
+
+	if (wakeup)
+		l |= 1 << 2;
+
+	__omap_dm_timer_write(base, OMAP_TIMER_OCP_CFG_REG, l, 0);
+
+	/* Match hardware reset default of posted mode */
+	__omap_dm_timer_write(base, OMAP_TIMER_IF_CTRL_REG,
+					OMAP_TIMER_CTRL_POSTED, 0);
+}
+
+static inline int __omap_dm_timer_set_source(struct clk *timer_fck,
+						struct clk *parent)
+{
+	int ret;
+
+	clk_disable(timer_fck);
+	ret = clk_set_parent(timer_fck, parent);
+	clk_enable(timer_fck);
+
+	/*
+	 * When the functional clock disappears, too quick writes seem
+	 * to cause an abort. XXX Is this still necessary?
+	 */
+	__delay(300000);
+
+	return ret;
+}
+
+static inline void __omap_dm_timer_stop(void __iomem *base, int posted,
+						unsigned long rate)
+{
+	u32 l;
+
+	l = __omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted);
+	if (l & OMAP_TIMER_CTRL_ST) {
+		l &= ~0x1;
+		__omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, l, posted);
+#ifdef CONFIG_ARCH_OMAP2PLUS
+		/* Readback to make sure write has completed */
+		__omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted);
+		/*
+		 * Wait for functional clock period x 3.5 to make sure that
+		 * timer is stopped
+		 */
+		udelay(3500000 / rate + 1);
+#endif
+	}
+
+	/* Ack possibly pending interrupt */
+	__omap_dm_timer_write(base, OMAP_TIMER_STAT_REG,
+					OMAP_TIMER_INT_OVERFLOW, 0);
+}
+
+static inline void __omap_dm_timer_load_start(void __iomem *base, u32 ctrl,
+						unsigned int load, int posted)
+{
+	__omap_dm_timer_write(base, OMAP_TIMER_COUNTER_REG, load, posted);
+	__omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, ctrl, posted);
+}
+
+static inline void __omap_dm_timer_int_enable(void __iomem *base,
+						unsigned int value)
+{
+	__omap_dm_timer_write(base, OMAP_TIMER_INT_EN_REG, value, 0);
+	__omap_dm_timer_write(base, OMAP_TIMER_WAKEUP_EN_REG, value, 0);
+}
+
+static inline unsigned int __omap_dm_timer_read_counter(void __iomem *base,
+							int posted)
+{
+	return __omap_dm_timer_read(base, OMAP_TIMER_COUNTER_REG, posted);
+}
+
+static inline void __omap_dm_timer_write_status(void __iomem *base,
+						unsigned int value)
+{
+	__omap_dm_timer_write(base, OMAP_TIMER_STAT_REG, value, 0);
+}
 
 #endif /* __ASM_ARCH_DMTIMER_H */
diff --git a/arch/arm/plat-omap/include/plat/irqs.h b/arch/arm/plat-omap/include/plat/irqs.h
index 5a25098ea7ea..c88432005665 100644
--- a/arch/arm/plat-omap/include/plat/irqs.h
+++ b/arch/arm/plat-omap/include/plat/irqs.h
@@ -428,7 +428,11 @@
 #define INTCPS_NR_IRQS		96
 
 #ifndef __ASSEMBLY__
-extern void omap_init_irq(void);
+extern void __iomem *omap_irq_base;
+void omap1_init_irq(void);
+void omap2_init_irq(void);
+void omap3_init_irq(void);
+void ti816x_init_irq(void);
 extern int omap_irq_pending(void);
 void omap_intc_save_context(void);
 void omap_intc_restore_context(void);