Merge branch 'cleanup-timer' of git://github.com/jonhunter/linux into omap-for-v3.8/timer

8 files changed, 74 insertions, 101 deletions

diff --git a/arch/arm/mach-omap1/timer.c b/arch/arm/mach-omap1/timer.c
index cdeb9d3..bde7a35 100644
--- a/arch/arm/mach-omap1/timer.c
+++ b/arch/arm/mach-omap1/timer.c
@@ -25,6 +25,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
 
 #include <mach/irqs.h>
 
diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c
index 8936819..41152fa 100644
--- a/arch/arm/mach-omap1/timer32k.c
+++ b/arch/arm/mach-omap1/timer32k.c
@@ -51,7 +51,6 @@
 #include <asm/mach/time.h>
 
 #include <plat/counter-32k.h>
-#include <plat/dmtimer.h>
 
 #include <mach/hardware.h>
 
diff --git a/arch/arm/mach-omap2/omap_hwmod_2420_data.c b/arch/arm/mach-omap2/omap_hwmod_2420_data.c
index a8b3368..e8efe3d 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2420_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2420_data.c
@@ -17,7 +17,6 @@
 #include <linux/platform_data/spi-omap2-mcspi.h>
 
 #include <plat-omap/dma-omap.h>
-#include <plat/dmtimer.h>
 
 #include "omap_hwmod.h"
 #include "l3_2xxx.h"
diff --git a/arch/arm/mach-omap2/omap_hwmod_2430_data.c b/arch/arm/mach-omap2/omap_hwmod_2430_data.c
index dc768c5..32d17e3 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2430_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2430_data.c
@@ -18,7 +18,6 @@
 #include <linux/platform_data/spi-omap2-mcspi.h>
 
 #include <plat-omap/dma-omap.h>
-#include <plat/dmtimer.h>
 
 #include "omap_hwmod.h"
 #include "mmc.h"
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 3cf4fdfd..e2c291f 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -30,7 +30,6 @@
 #include "clock.h"
 #include "powerdomain.h"
 #include "clockdomain.h"
-#include <plat/dmtimer.h>
 #include "omap-pm.h"
 
 #include "soc.h"
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 099e406..b7f43a2 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -39,6 +39,8 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
 
 #include <asm/mach/time.h>
 #include <asm/smp_twd.h>
@@ -160,11 +162,6 @@ static struct of_device_id omap_timer_match[] __initdata = {
 	{ }
 };
 
-static struct of_device_id omap_counter_match[] __initdata = {
-	{ .compatible = "ti,omap-counter32k", },
-	{ }
-};
-
 /**
  * omap_get_timer_dt - get a timer using device-tree
  * @match	- device-tree match structure for matching a device type
@@ -245,10 +242,8 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 	const char *oh_name;
 	struct device_node *np;
 	struct omap_hwmod *oh;
-	struct resource irq_rsrc, mem_rsrc;
-	size_t size;
-	int res = 0;
-	int r;
+	struct resource irq, mem;
+	int r = 0;
 
 	if (of_have_populated_dt()) {
 		np = omap_get_timer_dt(omap_timer_match, NULL);
@@ -280,20 +275,18 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 
 	if (!of_have_populated_dt()) {
 		r = omap_hwmod_get_resource_byname(oh, IORESOURCE_IRQ, NULL,
-						   &irq_rsrc);
+						   &irq);
 		if (r)
 			return -ENXIO;
-		timer->irq = irq_rsrc.start;
+		timer->irq = irq.start;
 
 		r = omap_hwmod_get_resource_byname(oh, IORESOURCE_MEM, NULL,
-						   &mem_rsrc);
+						   &mem);
 		if (r)
 			return -ENXIO;
-		timer->phys_base = mem_rsrc.start;
-		size = mem_rsrc.end - mem_rsrc.start;
 
 		/* Static mapping, never released */
-		timer->io_base = ioremap(timer->phys_base, size);
+		timer->io_base = ioremap(mem.start, mem.end - mem.start);
 	}
 
 	if (!timer->io_base)
@@ -310,10 +303,10 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 
 		src = clk_get(NULL, fck_source);
 		if (IS_ERR(src)) {
-			res = -EINVAL;
+			r = -EINVAL;
 		} else {
-			res = clk_set_parent(timer->fclk, src);
-			if (IS_ERR_VALUE(res))
+			r = clk_set_parent(timer->fclk, src);
+			if (IS_ERR_VALUE(r))
 				pr_warn("%s: %s cannot set source\n",
 					__func__, oh->name);
 			clk_put(src);
@@ -334,7 +327,7 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 	timer->rate = clk_get_rate(timer->fclk);
 	timer->reserved = 1;
 
-	return res;
+	return r;
 }
 
 static void __init omap2_gp_clockevent_init(int gptimer_id,
@@ -408,6 +401,11 @@ static u32 notrace dmtimer_read_sched_clock(void)
 }
 
 #ifdef CONFIG_OMAP_32K_TIMER
+static struct of_device_id omap_counter_match[] __initdata = {
+	{ .compatible = "ti,omap-counter32k", },
+	{ }
+};
+
 /* Setup free-running counter for clocksource */
 static int __init omap2_sync32k_clocksource_init(void)
 {
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 9deeb30..89585c2 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -43,6 +43,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
 
 #include <plat/dmtimer.h>
 
@@ -99,32 +101,39 @@ static void omap_timer_restore_context(struct omap_dm_timer *timer)
 				timer->context.tclr);
 }
 
-static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
+static int omap_dm_timer_reset(struct omap_dm_timer *timer)
 {
-	int c;
+	u32 l, timeout = 100000;
 
-	if (!timer->sys_stat)
-		return;
+	if (timer->revision != 1)
+		return -EINVAL;
 
-	c = 0;
-	while (!(__raw_readl(timer->sys_stat) & 1)) {
-		c++;
-		if (c > 100000) {
-			printk(KERN_ERR "Timer failed to reset\n");
-			return;
-		}
+	omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
+
+	do {
+		l = __omap_dm_timer_read(timer,
+					 OMAP_TIMER_V1_SYS_STAT_OFFSET, 0);
+	} while (!l && timeout--);
+
+	if (!timeout) {
+		dev_err(&timer->pdev->dev, "Timer failed to reset\n");
+		return -ETIMEDOUT;
 	}
-}
 
-static void omap_dm_timer_reset(struct omap_dm_timer *timer)
-{
-	omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
-	omap_dm_timer_wait_for_reset(timer);
-	__omap_dm_timer_reset(timer, 0, 0);
+	/* Configure timer for smart-idle mode */
+	l = __omap_dm_timer_read(timer, OMAP_TIMER_OCP_CFG_OFFSET, 0);
+	l |= 0x2 << 0x3;
+	__omap_dm_timer_write(timer, OMAP_TIMER_OCP_CFG_OFFSET, l, 0);
+
+	timer->posted = 0;
+
+	return 0;
 }
 
-int omap_dm_timer_prepare(struct omap_dm_timer *timer)
+static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 {
+	int rc;
+
 	/*
 	 * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
 	 * do not call clk_get() for these devices.
@@ -140,8 +149,13 @@ int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 
 	omap_dm_timer_enable(timer);
 
-	if (timer->capability & OMAP_TIMER_NEEDS_RESET)
-		omap_dm_timer_reset(timer);
+	if (timer->capability & OMAP_TIMER_NEEDS_RESET) {
+		rc = omap_dm_timer_reset(timer);
+		if (rc) {
+			omap_dm_timer_disable(timer);
+			return rc;
+		}
+	}
 
 	__omap_dm_timer_enable_posted(timer);
 	omap_dm_timer_disable(timer);
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index 05a36e1..a3fbc48 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -79,8 +79,6 @@ struct omap_timer_capability_dev_attr {
 	u32 timer_capability;
 };
 
-struct omap_dm_timer;
-
 struct timer_regs {
 	u32 tidr;
 	u32 tier;
@@ -101,12 +99,29 @@ struct timer_regs {
 	u32 towr;
 };
 
-struct dmtimer_platform_data {
-	/* set_timer_src - Only used for OMAP1 devices */
-	int (*set_timer_src)(struct platform_device *pdev, int source);
-	u32 timer_errata;
-	u32 timer_capability;
+struct omap_dm_timer {
+	int id;
+	int irq;
+	struct clk *fclk;
+
+	void __iomem	*io_base;
+	void __iomem	*irq_stat;	/* TISR/IRQSTATUS interrupt status */
+	void __iomem	*irq_ena;	/* irq enable */
+	void __iomem	*irq_dis;	/* irq disable, only on v2 ip */
+	void __iomem	*pend;		/* write pending */
+	void __iomem	*func_base;	/* function register base */
+
+	unsigned long rate;
+	unsigned reserved:1;
+	unsigned posted:1;
+	struct timer_regs context;
 	int (*get_context_loss_count)(struct device *);
+	int ctx_loss_count;
+	int revision;
+	u32 capability;
+	u32 errata;
+	struct platform_device *pdev;
+	struct list_head node;
 };
 
 int omap_dm_timer_reserve_systimer(int id);
@@ -260,35 +275,6 @@ int omap_dm_timers_active(void);
 #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 id;
-	int irq;
-	struct clk *fclk;
-
-	void __iomem	*io_base;
-	void __iomem	*sys_stat;	/* TISTAT timer status */
-	void __iomem	*irq_stat;	/* TISR/IRQSTATUS interrupt status */
-	void __iomem	*irq_ena;	/* irq enable */
-	void __iomem	*irq_dis;	/* irq disable, only on v2 ip */
-	void __iomem	*pend;		/* write pending */
-	void __iomem	*func_base;	/* function register base */
-
-	unsigned long rate;
-	unsigned reserved:1;
-	unsigned posted:1;
-	struct timer_regs context;
-	int (*get_context_loss_count)(struct device *);
-	int ctx_loss_count;
-	int revision;
-	u32 capability;
-	u32 errata;
-	struct platform_device *pdev;
-	struct list_head node;
-};
-
-int omap_dm_timer_prepare(struct omap_dm_timer *timer);
-
 static inline u32 __omap_dm_timer_read(struct omap_dm_timer *timer, u32 reg,
 						int posted)
 {
@@ -317,8 +303,6 @@ static inline void __omap_dm_timer_init_regs(struct omap_dm_timer *timer)
 	tidr = __raw_readl(timer->io_base);
 	if (!(tidr >> 16)) {
 		timer->revision = 1;
-		timer->sys_stat = timer->io_base +
-				OMAP_TIMER_V1_SYS_STAT_OFFSET;
 		timer->irq_stat = timer->io_base + OMAP_TIMER_V1_STAT_OFFSET;
 		timer->irq_ena = timer->io_base + OMAP_TIMER_V1_INT_EN_OFFSET;
 		timer->irq_dis = timer->io_base + OMAP_TIMER_V1_INT_EN_OFFSET;
@@ -326,7 +310,6 @@ static inline void __omap_dm_timer_init_regs(struct omap_dm_timer *timer)
 		timer->func_base = timer->io_base;
 	} else {
 		timer->revision = 2;
-		timer->sys_stat = NULL;
 		timer->irq_stat = timer->io_base + OMAP_TIMER_V2_IRQSTATUS;
 		timer->irq_ena = timer->io_base + OMAP_TIMER_V2_IRQENABLE_SET;
 		timer->irq_dis = timer->io_base + OMAP_TIMER_V2_IRQENABLE_CLR;
@@ -337,25 +320,6 @@ static inline void __omap_dm_timer_init_regs(struct omap_dm_timer *timer)
 	}
 }
 
-/* Assumes the source clock has been set by caller */
-static inline void __omap_dm_timer_reset(struct omap_dm_timer *timer,
-					int autoidle, int wakeup)
-{
-	u32 l;
-
-	l = __raw_readl(timer->io_base + OMAP_TIMER_OCP_CFG_OFFSET);
-	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;
-
-	__raw_writel(l, timer->io_base + OMAP_TIMER_OCP_CFG_OFFSET);
-}
-
 /*
  * __omap_dm_timer_enable_posted - enables write posted mode
  * @timer:      pointer to timer instance handle