1 files changed, 0 insertions, 257 deletions
diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c
deleted file mode 100644
index 63cdc6025bd..00000000000
--- a/arch/arm/plat-nomadik/timer.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- *  linux/arch/arm/plat-nomadik/timer.c
- *
- * Copyright (C) 2008 STMicroelectronics
- * Copyright (C) 2010 Alessandro Rubini
- * Copyright (C) 2010 Linus Walleij for ST-Ericsson
- *
- * 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/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/clockchips.h>
-#include <linux/clk.h>
-#include <linux/jiffies.h>
-#include <linux/err.h>
-#include <linux/cnt32_to_63.h>
-#include <linux/timer.h>
-#include <asm/mach/time.h>
-
-#include <plat/mtu.h>
-
-void __iomem *mtu_base; /* Assigned by machine code */
-
-/*
- * Kernel assumes that sched_clock can be called early
- * but the MTU may not yet be initialized.
- */
-static cycle_t nmdk_read_timer_dummy(struct clocksource *cs)
-{
-	return 0;
-}
-
-/* clocksource: MTU decrements, so we negate the value being read. */
-static cycle_t nmdk_read_timer(struct clocksource *cs)
-{
-	return -readl(mtu_base + MTU_VAL(0));
-}
-
-static struct clocksource nmdk_clksrc = {
-	.name		= "mtu_0",
-	.rating		= 200,
-	.read		= nmdk_read_timer_dummy,
-	.mask		= CLOCKSOURCE_MASK(32),
-	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-/*
- * Override the global weak sched_clock symbol with this
- * local implementation which uses the clocksource to get some
- * better resolution when scheduling the kernel.
- *
- * Because the hardware timer period may be quite short
- * (32.3 secs on the 133 MHz MTU timer selection on ux500)
- * and because cnt32_to_63() needs to be called at least once per
- * half period to work properly, a kernel keepwarm() timer is set up
- * to ensure this requirement is always met.
- *
- * Also the sched_clock timer will wrap around at some point,
- * here we set it to run continously for a year.
- */
-#define SCHED_CLOCK_MIN_WRAP 3600*24*365
-static struct timer_list cnt32_to_63_keepwarm_timer;
-static u32 sched_mult;
-static u32 sched_shift;
-
-unsigned long long notrace sched_clock(void)
-{
-	u64 cycles;
-
-	if (unlikely(!mtu_base))
-		return 0;
-
-	cycles = cnt32_to_63(-readl(mtu_base + MTU_VAL(0)));
-	/*
-	 * sched_mult is guaranteed to be even so will
-	 * shift out bit 63
-	 */
-	return (cycles * sched_mult) >> sched_shift;
-}
-
-/* Just kick sched_clock every so often */
-static void cnt32_to_63_keepwarm(unsigned long data)
-{
-	mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + data));
-	(void) sched_clock();
-}
-
-/*
- * Set up a timer to keep sched_clock():s 32_to_63 algorithm warm
- * once in half a 32bit timer wrap interval.
- */
-static void __init nmdk_sched_clock_init(unsigned long rate)
-{
-	u32 v;
-	unsigned long delta;
-	u64 days;
-
-	/* Find the apropriate mult and shift factors */
-	clocks_calc_mult_shift(&sched_mult, &sched_shift,
-			       rate, NSEC_PER_SEC, SCHED_CLOCK_MIN_WRAP);
-	/* We need to multiply by an even number to get rid of bit 63 */
-	if (sched_mult & 1)
-		sched_mult++;
-
-	/* Let's see what we get, take max counter and scale it */
-	days = (0xFFFFFFFFFFFFFFFFLLU * sched_mult) >> sched_shift;
-	do_div(days, NSEC_PER_SEC);
-	do_div(days, (3600*24));
-
-	pr_info("sched_clock: using %d bits @ %lu Hz wrap in %lu days\n",
-		(64 - sched_shift), rate, (unsigned long) days);
-
-	/*
-	 * Program a timer to kick us at half 32bit wraparound
-	 * Formula: seconds per wrap = (2^32) / f
-	 */
-	v = 0xFFFFFFFFUL / rate;
-	/* We want half of the wrap time to keep cnt32_to_63 warm */
-	v /= 2;
-	pr_debug("sched_clock: prescaled timer rate: %lu Hz, "
-		 "initialize keepwarm timer every %d seconds\n", rate, v);
-	/* Convert seconds to jiffies */
-	delta = msecs_to_jiffies(v*1000);
-	setup_timer(&cnt32_to_63_keepwarm_timer, cnt32_to_63_keepwarm, delta);
-	mod_timer(&cnt32_to_63_keepwarm_timer, round_jiffies(jiffies + delta));
-}
-
-/* Clockevent device: use one-shot mode */
-static void nmdk_clkevt_mode(enum clock_event_mode mode,
-			     struct clock_event_device *dev)
-{
-	u32 cr;
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		pr_err("%s: periodic mode not supported\n", __func__);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		/* Load highest value, enable device, enable interrupts */
-		cr = readl(mtu_base + MTU_CR(1));
-		writel(0, mtu_base + MTU_LR(1));
-		writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(1));
-		writel(1 << 1, mtu_base + MTU_IMSC);
-		break;
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_UNUSED:
-		/* disable irq */
-		writel(0, mtu_base + MTU_IMSC);
-		/* disable timer */
-		cr = readl(mtu_base + MTU_CR(1));
-		cr &= ~MTU_CRn_ENA;
-		writel(cr, mtu_base + MTU_CR(1));
-		/* load some high default value */
-		writel(0xffffffff, mtu_base + MTU_LR(1));
-		break;
-	case CLOCK_EVT_MODE_RESUME:
-		break;
-	}
-}
-
-static int nmdk_clkevt_next(unsigned long evt, struct clock_event_device *ev)
-{
-	/* writing the value has immediate effect */
-	writel(evt, mtu_base + MTU_LR(1));
-	return 0;
-}
-
-static struct clock_event_device nmdk_clkevt = {
-	.name		= "mtu_1",
-	.features	= CLOCK_EVT_FEAT_ONESHOT,
-	.rating		= 200,
-	.set_mode	= nmdk_clkevt_mode,
-	.set_next_event	= nmdk_clkevt_next,
-};
-
-/*
- * IRQ Handler for timer 1 of the MTU block.
- */
-static irqreturn_t nmdk_timer_interrupt(int irq, void *dev_id)
-{
-	struct clock_event_device *evdev = dev_id;
-
-	writel(1 << 1, mtu_base + MTU_ICR); /* Interrupt clear reg */
-	evdev->event_handler(evdev);
-	return IRQ_HANDLED;
-}
-
-static struct irqaction nmdk_timer_irq = {
-	.name		= "Nomadik Timer Tick",
-	.flags		= IRQF_DISABLED | IRQF_TIMER,
-	.handler	= nmdk_timer_interrupt,
-	.dev_id		= &nmdk_clkevt,
-};
-
-void __init nmdk_timer_init(void)
-{
-	unsigned long rate;
-	struct clk *clk0;
-	u32 cr = MTU_CRn_32BITS;
-
-	clk0 = clk_get_sys("mtu0", NULL);
-	BUG_ON(IS_ERR(clk0));
-
-	clk_enable(clk0);
-
-	/*
-	 * Tick rate is 2.4MHz for Nomadik and 2.4Mhz, 100MHz or 133 MHz
-	 * for ux500.
-	 * Use a divide-by-16 counter if the tick rate is more than 32MHz.
-	 * At 32 MHz, the timer (with 32 bit counter) can be programmed
-	 * to wake-up at a max 127s a head in time. Dividing a 2.4 MHz timer
-	 * with 16 gives too low timer resolution.
-	 */
-	rate = clk_get_rate(clk0);
-	if (rate > 32000000) {
-		rate /= 16;
-		cr |= MTU_CRn_PRESCALE_16;
-	} else {
-		cr |= MTU_CRn_PRESCALE_1;
-	}
-	clocksource_calc_mult_shift(&nmdk_clksrc, rate, MTU_MIN_RANGE);
-
-	/* Timer 0 is the free running clocksource */
-	writel(cr, mtu_base + MTU_CR(0));
-	writel(0, mtu_base + MTU_LR(0));
-	writel(0, mtu_base + MTU_BGLR(0));
-	writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0));
-
-	/* Now the clock source is ready */
-	nmdk_clksrc.read = nmdk_read_timer;
-
-	if (clocksource_register(&nmdk_clksrc))
-		pr_err("timer: failed to initialize clock source %s\n",
-		       nmdk_clksrc.name);
-
-	nmdk_sched_clock_init(rate);
-
-	/* Timer 1 is used for events */
-
-	clockevents_calc_mult_shift(&nmdk_clkevt, rate, MTU_MIN_RANGE);
-
-	writel(cr | MTU_CRn_ONESHOT, mtu_base + MTU_CR(1)); /* off, currently */
-
-	nmdk_clkevt.max_delta_ns =
-		clockevent_delta2ns(0xffffffff, &nmdk_clkevt);
-	nmdk_clkevt.min_delta_ns =
-		clockevent_delta2ns(0x00000002, &nmdk_clkevt);
-	nmdk_clkevt.cpumask	= cpumask_of(0);
-
-	/* Register irq and clockevents */
-	setup_irq(IRQ_MTU0, &nmdk_timer_irq);
-	clockevents_register_device(&nmdk_clkevt);
-}