mach-ux500: Use localtimer.c from mainline 2.6.33

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>

2 files changed, 12 insertions, 191 deletions

diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 2c2d8b0ab85..473801f5ca6 100755
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -8,7 +8,7 @@ ifeq ($(CONFIG_CRYPTO_DEV_UX500_HASH), m)
 	CFLAGS_board-mop500.o += -DCONFIG_CRYPTO_DEV_UX500_HASH
 endif
 
-obj-y					:= clock.o timer.o timer-rtt.o gpio.o
+obj-y					:= clock.o timer.o timer-rtt.o gpio.o localtimer.o
 obj-$(CONFIG_REGULATOR)			+= regulator.o
 obj-$(CONFIG_ARCH_U8500)		+= devices.o cpu.o
 obj-$(CONFIG_STM_DMA)			+= dma_40.o   #part1 no. of dma is 0x40
diff --git a/arch/arm/mach-ux500/localtimer.c b/arch/arm/mach-ux500/localtimer.c
index dee1267b7e3..2288f6a7c51 100755
--- a/arch/arm/mach-ux500/localtimer.c
+++ b/arch/arm/mach-ux500/localtimer.c
@@ -1,207 +1,28 @@
 /*
- *  Copyright (C) 2009 ST-Ericsson SA
- *	This file is based on realview platform
- *  Copyright (C) 2002 ARM Ltd.
+ * Copyright (C) 2008-2009 ST-Ericsson
+ * Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
+ *
+ * This file is heavily based on relaview platform, almost a copy.
+ *
+ * Copyright (C) 2002 ARM Ltd.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/device.h>
 #include <linux/smp.h>
-#include <linux/jiffies.h>
-#include <linux/percpu.h>
 #include <linux/clockchips.h>
-#include <linux/irq.h>
 
-#include <asm/hardware/arm_twd.h>
-#include <asm/hardware/gic.h>
-#include <mach/hardware.h>
-#include <asm/io.h>
 #include <asm/irq.h>
-#include <mach/mtu.h>
-
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-
-/*
- * Used on SMP for either the local timer or IPI_TIMER
- */
-void local_timer_interrupt(void)
-{
-	struct clock_event_device *clk = &__get_cpu_var(local_clockevent);
-
-	clk->event_handler(clk);
-}
-
-#ifdef CONFIG_LOCAL_TIMERS
-
-/* set up by the platform code */
-void __iomem *twd_base;
-
-static unsigned long mpcore_timer_rate;
-
-static void local_timer_set_mode(enum clock_event_mode mode,
-				 struct clock_event_device *clk)
-{
-	unsigned long ctrl;
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		/* timer load already set up */
-		ctrl = TWD_TIMER_CONTROL_ENABLE | TWD_TIMER_CONTROL_IT_ENABLE
-			| TWD_TIMER_CONTROL_PERIODIC;
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		/* period set, and timer enabled in 'next_event' hook */
-		ctrl = TWD_TIMER_CONTROL_IT_ENABLE | TWD_TIMER_CONTROL_ONESHOT;
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	default:
-		ctrl = 0;
-	}
-
-	__raw_writel(ctrl, twd_base + TWD_TIMER_CONTROL);
-}
-
-static int local_timer_set_next_event(unsigned long evt,
-				      struct clock_event_device *unused)
-{
-	unsigned long ctrl = __raw_readl(twd_base + TWD_TIMER_CONTROL);
-
-	__raw_writel(evt, twd_base + TWD_TIMER_COUNTER);
-	__raw_writel(ctrl | TWD_TIMER_CONTROL_ENABLE,
-			twd_base + TWD_TIMER_CONTROL);
-
-	return 0;
-}
-
-/*
- * local_timer_ack: checks for a local timer interrupt.
- *
- * If a local timer interrupt has occurred, acknowledge and return 1.
- * Otherwise, return 0.
- */
-int local_timer_ack(void)
-{
-	if (__raw_readl(twd_base + TWD_TIMER_INTSTAT)) {
-		__raw_writel(1, twd_base + TWD_TIMER_INTSTAT);
-		return 1;
-	}
-	return 0;
-}
-
-static void __cpuinit twd_calibrate_rate(void)
-{
-	unsigned long load, count;
-	u64 waitjiffies;
-
-	/*
-	 * If this is the first time round, we need to work out how fast
-	 * the timer ticks
-	 */
-	if (mpcore_timer_rate == 0) {
-		printk("Calibrating local timer... ");
-
-		/* Wait for a tick to start */
-		waitjiffies = get_jiffies_64() + 1;
-
-		while (get_jiffies_64() < waitjiffies)
-			udelay(10);
-
-		/* OK, now the tick has started, let's get the timer going */
-		waitjiffies += 5;
-
-				 /* enable, no interrupt or reload */
-		__raw_writel(0x1, twd_base + TWD_TIMER_CONTROL);
-
-				 /* maximum value */
-		__raw_writel(0xFFFFFFFFU, twd_base + TWD_TIMER_COUNTER);
-
-		while (get_jiffies_64() < waitjiffies)
-			udelay(10);
-
-		count = __raw_readl(twd_base + TWD_TIMER_COUNTER);
-
-		mpcore_timer_rate = (0xFFFFFFFFU - count) * (HZ / 5);
-
-		printk("%lu.%02luMHz.\n", mpcore_timer_rate / 1000000,
-			(mpcore_timer_rate / 100000) % 100);
-	}
-
-	load = mpcore_timer_rate / HZ;
-
-	__raw_writel(load, twd_base + TWD_TIMER_LOAD);
-}
-
-extern struct mtu_struct mtu_timer_tick;
+#include <asm/smp_twd.h>
+#include <asm/localtimer.h>
 
 /*
  * Setup the local clock events for a CPU.
  */
-void __cpuinit local_timer_setup(void)
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
 {
-	unsigned int cpu = smp_processor_id();
-	struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-	unsigned long flags;
-
-	twd_calibrate_rate();
-
-	clk->name		= "local_timer";
-	clk->features		= CLOCK_EVT_FEAT_PERIODIC |
-					CLOCK_EVT_FEAT_ONESHOT |
-						CLOCK_EVT_FEAT_C3STOP;
-	clk->rating		= 550;
-	clk->set_mode		= local_timer_set_mode;
-	clk->set_next_event	= local_timer_set_next_event;
-	clk->irq		= IRQ_LOCALTIMER;
-	clk->cpumask		= cpumask_of(cpu);
-	clk->shift		= 20;
-	clk->mult		= div_sc(mpcore_timer_rate, NSEC_PER_SEC,
-					clk->shift);
-	clk->max_delta_ns	= clockevent_delta2ns(0xffffffff, clk);
-	clk->min_delta_ns	= clockevent_delta2ns(0xf, clk);
-	clk->broadcast		= smp_timer_broadcast;
-
-	/* Make sure our local interrupt controller has this enabled */
-	local_irq_save(flags);
-	get_irq_chip(IRQ_LOCALTIMER)->unmask(IRQ_LOCALTIMER);
-	local_irq_restore(flags);
-
-	clockevents_register_device(clk);
-}
-
-/*
- * take a local timer down
- */
-void __cpuexit local_timer_stop(void)
-{
-	__raw_writel(0, twd_base + TWD_TIMER_CONTROL);
-}
-
-#else	/* CONFIG_LOCAL_TIMERS */
-
-static void dummy_timer_set_mode(enum clock_event_mode mode,
-			struct clock_event_device *clk)
-{
-}
-
-void __cpuinit local_timer_setup(void)
-{
-	unsigned int cpu = smp_processor_id();
-	struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-
-	clk->name               = "dummy_timer";
-	clk->features           = CLOCK_EVT_FEAT_DUMMY;
-	clk->rating             = 200;
-	clk->set_mode           = dummy_timer_set_mode;
-	clk->broadcast		= smp_timer_broadcast;
-	clk->cpumask            = cpumask_of(cpu);
-	clk->mult		= 1;
-
-	clockevents_register_device(clk);
+	evt->irq = IRQ_LOCALTIMER;
+	twd_timer_setup(evt);
 }
-#endif	/* !CONFIG_LOCAL_TIMERS */