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-rw-r--r--arch/avr32/kernel/time.c161
1 files changed, 0 insertions, 161 deletions
diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c
deleted file mode 100644
index 4d9b696..0000000
--- a/arch/avr32/kernel/time.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * Copyright (C) 2004-2007 Atmel Corporation
- *
- * 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/clk.h>
-#include <linux/clockchips.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/cpu.h>
-
-#include <asm/sysreg.h>
-
-#include <mach/pm.h>
-
-static bool disable_cpu_idle_poll;
-
-static u64 read_cycle_count(struct clocksource *cs)
-{
- return (u64)sysreg_read(COUNT);
-}
-
-/*
- * The architectural cycle count registers are a fine clocksource unless
- * the system idle loop use sleep states like "idle": the CPU cycles
- * measured by COUNT (and COMPARE) don't happen during sleep states.
- * Their duration also changes if cpufreq changes the CPU clock rate.
- * So we rate the clocksource using COUNT as very low quality.
- */
-static struct clocksource counter = {
- .name = "avr32_counter",
- .rating = 50,
- .read = read_cycle_count,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evdev = dev_id;
-
- if (unlikely(!(intc_get_pending(0) & 1)))
- return IRQ_NONE;
-
- /*
- * Disable the interrupt until the clockevent subsystem
- * reprograms it.
- */
- sysreg_write(COMPARE, 0);
-
- evdev->event_handler(evdev);
- return IRQ_HANDLED;
-}
-
-static struct irqaction timer_irqaction = {
- .handler = timer_interrupt,
- /* Oprofile uses the same irq as the timer, so allow it to be shared */
- .flags = IRQF_TIMER | IRQF_SHARED,
- .name = "avr32_comparator",
-};
-
-static int comparator_next_event(unsigned long delta,
- struct clock_event_device *evdev)
-{
- unsigned long flags;
-
- raw_local_irq_save(flags);
-
- /* The time to read COUNT then update COMPARE must be less
- * than the min_delta_ns value for this clockevent source.
- */
- sysreg_write(COMPARE, (sysreg_read(COUNT) + delta) ? : 1);
-
- raw_local_irq_restore(flags);
-
- return 0;
-}
-
-static int comparator_shutdown(struct clock_event_device *evdev)
-{
- pr_debug("%s: %s\n", __func__, evdev->name);
- sysreg_write(COMPARE, 0);
-
- if (disable_cpu_idle_poll) {
- disable_cpu_idle_poll = false;
- /*
- * Only disable idle poll if we have forced that
- * in a previous call.
- */
- cpu_idle_poll_ctrl(false);
- }
- return 0;
-}
-
-static int comparator_set_oneshot(struct clock_event_device *evdev)
-{
- pr_debug("%s: %s\n", __func__, evdev->name);
-
- disable_cpu_idle_poll = true;
- /*
- * If we're using the COUNT and COMPARE registers we
- * need to force idle poll.
- */
- cpu_idle_poll_ctrl(true);
-
- return 0;
-}
-
-static struct clock_event_device comparator = {
- .name = "avr32_comparator",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .shift = 16,
- .rating = 50,
- .set_next_event = comparator_next_event,
- .set_state_shutdown = comparator_shutdown,
- .set_state_oneshot = comparator_set_oneshot,
- .tick_resume = comparator_set_oneshot,
-};
-
-void read_persistent_clock(struct timespec *ts)
-{
- ts->tv_sec = mktime(2007, 1, 1, 0, 0, 0);
- ts->tv_nsec = 0;
-}
-
-void __init time_init(void)
-{
- unsigned long counter_hz;
- int ret;
-
- /* figure rate for counter */
- counter_hz = clk_get_rate(boot_cpu_data.clk);
- ret = clocksource_register_hz(&counter, counter_hz);
- if (ret)
- pr_debug("timer: could not register clocksource: %d\n", ret);
-
- /* setup COMPARE clockevent */
- comparator.mult = div_sc(counter_hz, NSEC_PER_SEC, comparator.shift);
- comparator.max_delta_ns = clockevent_delta2ns((u32)~0, &comparator);
- comparator.min_delta_ns = clockevent_delta2ns(50, &comparator) + 1;
- comparator.cpumask = cpumask_of(0);
-
- sysreg_write(COMPARE, 0);
- timer_irqaction.dev_id = &comparator;
-
- ret = setup_irq(0, &timer_irqaction);
- if (ret)
- pr_debug("timer: could not request IRQ 0: %d\n", ret);
- else {
- clockevents_register_device(&comparator);
-
- pr_info("%s: irq 0, %lu.%03lu MHz\n", comparator.name,
- ((counter_hz + 500) / 1000) / 1000,
- ((counter_hz + 500) / 1000) % 1000);
- }
-}
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