ARM: 8252/1: sa1100: use pxa_timer clocksource driver

[uclinux-h8/linux.git] / arch / arm / mach-sa1100 / time.c

diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c
deleted file mode 100644 (file)
index 1dea6cf..0000000
--- a/arch/arm/mach-sa1100/time.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * linux/arch/arm/mach-sa1100/time.c
- *
- * Copyright (C) 1998 Deborah Wallach.
- * Twiddles  (C) 1999 Hugo Fiennes <hugo@empeg.com>
- *
- * 2000/03/29 (C) Nicolas Pitre <nico@fluxnic.net>
- *     Rewritten: big cleanup, much simpler, better HZ accuracy.
- *
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/timex.h>
-#include <linux/clockchips.h>
-#include <linux/sched_clock.h>
-
-#include <asm/mach/time.h>
-#include <mach/hardware.h>
-#include <mach/irqs.h>
-
-#define SA1100_CLOCK_FREQ 3686400
-#define SA1100_LATCH DIV_ROUND_CLOSEST(SA1100_CLOCK_FREQ, HZ)
-
-static u64 notrace sa1100_read_sched_clock(void)
-{
-       return readl_relaxed(OSCR);
-}
-
-#define MIN_OSCR_DELTA 2
-
-static irqreturn_t sa1100_ost0_interrupt(int irq, void *dev_id)
-{
-       struct clock_event_device *c = dev_id;
-
-       /* Disarm the compare/match, signal the event. */
-       writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER);
-       writel_relaxed(OSSR_M0, OSSR);
-       c->event_handler(c);
-
-       return IRQ_HANDLED;
-}
-
-static int
-sa1100_osmr0_set_next_event(unsigned long delta, struct clock_event_device *c)
-{
-       unsigned long next, oscr;
-
-       writel_relaxed(readl_relaxed(OIER) | OIER_E0, OIER);
-       next = readl_relaxed(OSCR) + delta;
-       writel_relaxed(next, OSMR0);
-       oscr = readl_relaxed(OSCR);
-
-       return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;
-}
-
-static void
-sa1100_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c)
-{
-       switch (mode) {
-       case CLOCK_EVT_MODE_ONESHOT:
-       case CLOCK_EVT_MODE_UNUSED:
-       case CLOCK_EVT_MODE_SHUTDOWN:
-               writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER);
-               writel_relaxed(OSSR_M0, OSSR);
-               break;
-
-       case CLOCK_EVT_MODE_RESUME:
-       case CLOCK_EVT_MODE_PERIODIC:
-               break;
-       }
-}
-
-#ifdef CONFIG_PM
-unsigned long osmr[4], oier;
-
-static void sa1100_timer_suspend(struct clock_event_device *cedev)
-{
-       osmr[0] = readl_relaxed(OSMR0);
-       osmr[1] = readl_relaxed(OSMR1);
-       osmr[2] = readl_relaxed(OSMR2);
-       osmr[3] = readl_relaxed(OSMR3);
-       oier = readl_relaxed(OIER);
-}
-
-static void sa1100_timer_resume(struct clock_event_device *cedev)
-{
-       writel_relaxed(0x0f, OSSR);
-       writel_relaxed(osmr[0], OSMR0);
-       writel_relaxed(osmr[1], OSMR1);
-       writel_relaxed(osmr[2], OSMR2);
-       writel_relaxed(osmr[3], OSMR3);
-       writel_relaxed(oier, OIER);
-
-       /*
-        * OSMR0 is the system timer: make sure OSCR is sufficiently behind
-        */
-       writel_relaxed(OSMR0 - SA1100_LATCH, OSCR);
-}
-#else
-#define sa1100_timer_suspend NULL
-#define sa1100_timer_resume NULL
-#endif
-
-static struct clock_event_device ckevt_sa1100_osmr0 = {
-       .name           = "osmr0",
-       .features       = CLOCK_EVT_FEAT_ONESHOT,
-       .rating         = 200,
-       .set_next_event = sa1100_osmr0_set_next_event,
-       .set_mode       = sa1100_osmr0_set_mode,
-       .suspend        = sa1100_timer_suspend,
-       .resume         = sa1100_timer_resume,
-};
-
-static struct irqaction sa1100_timer_irq = {
-       .name           = "ost0",
-       .flags          = IRQF_TIMER | IRQF_IRQPOLL,
-       .handler        = sa1100_ost0_interrupt,
-       .dev_id         = &ckevt_sa1100_osmr0,
-};
-
-void __init sa1100_timer_init(void)
-{
-       writel_relaxed(0, OIER);
-       writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
-
-       sched_clock_register(sa1100_read_sched_clock, 32, 3686400);
-
-       ckevt_sa1100_osmr0.cpumask = cpumask_of(0);
-
-       setup_irq(IRQ_OST0, &sa1100_timer_irq);
-
-       clocksource_mmio_init(OSCR, "oscr", SA1100_CLOCK_FREQ, 200, 32,
-               clocksource_mmio_readl_up);
-       clockevents_config_and_register(&ckevt_sa1100_osmr0, 3686400,
-                                       MIN_OSCR_DELTA * 2, 0x7fffffff);
-}