clocksource: pxa: Move PXA timer to clocksource framework
Move time.c from arch/arm/mach-pxa/time.c to
drivers/clocksource/pxa_timer.c.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 648867a..2fe1824 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -4,7 +4,7 @@
# Common support (must be linked before board specific support)
obj-y += clock.o devices.o generic.o irq.o \
- time.o reset.o
+ reset.o
obj-$(CONFIG_PM) += pm.o sleep.o standby.o
# Generic drivers that other drivers may depend upon
diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c
deleted file mode 100644
index fca174e..0000000
--- a/arch/arm/mach-pxa/time.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * arch/arm/mach-pxa/time.c
- *
- * PXA clocksource, clockevents, and OST interrupt handlers.
- * Copyright (c) 2007 by Bill Gatliff <bgat@billgatliff.com>.
- *
- * Derived from Nicolas Pitre's PXA timer handler Copyright (c) 2001
- * by MontaVista Software, Inc. (Nico, your code rocks!)
- *
- * 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/kernel.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/clockchips.h>
-#include <linux/sched_clock.h>
-
-#include <asm/div64.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-#include <mach/regs-ost.h>
-#include <mach/irqs.h>
-
-/*
- * This is PXA's sched_clock implementation. This has a resolution
- * of at least 308 ns and a maximum value of 208 days.
- *
- * The return value is guaranteed to be monotonic in that range as
- * long as there is always less than 582 seconds between successive
- * calls to sched_clock() which should always be the case in practice.
- */
-
-static u64 notrace pxa_read_sched_clock(void)
-{
- return readl_relaxed(OSCR);
-}
-
-
-#define MIN_OSCR_DELTA 16
-
-static irqreturn_t
-pxa_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
-pxa_osmr0_set_next_event(unsigned long delta, struct clock_event_device *dev)
-{
- 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
-pxa_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *dev)
-{
- switch (mode) {
- case CLOCK_EVT_MODE_ONESHOT:
- writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER);
- writel_relaxed(OSSR_M0, OSSR);
- break;
-
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- /* initializing, released, or preparing for suspend */
- 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
-static unsigned long osmr[4], oier, oscr;
-
-static void pxa_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);
- oscr = readl_relaxed(OSCR);
-}
-
-static void pxa_timer_resume(struct clock_event_device *cedev)
-{
- /*
- * Ensure that we have at least MIN_OSCR_DELTA between match
- * register 0 and the OSCR, to guarantee that we will receive
- * the one-shot timer interrupt. We adjust OSMR0 in preference
- * to OSCR to guarantee that OSCR is monotonically incrementing.
- */
- if (osmr[0] - oscr < MIN_OSCR_DELTA)
- osmr[0] += MIN_OSCR_DELTA;
-
- writel_relaxed(osmr[0], OSMR0);
- writel_relaxed(osmr[1], OSMR1);
- writel_relaxed(osmr[2], OSMR2);
- writel_relaxed(osmr[3], OSMR3);
- writel_relaxed(oier, OIER);
- writel_relaxed(oscr, OSCR);
-}
-#else
-#define pxa_timer_suspend NULL
-#define pxa_timer_resume NULL
-#endif
-
-static struct clock_event_device ckevt_pxa_osmr0 = {
- .name = "osmr0",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .rating = 200,
- .set_next_event = pxa_osmr0_set_next_event,
- .set_mode = pxa_osmr0_set_mode,
- .suspend = pxa_timer_suspend,
- .resume = pxa_timer_resume,
-};
-
-static struct irqaction pxa_ost0_irq = {
- .name = "ost0",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = pxa_ost0_interrupt,
- .dev_id = &ckevt_pxa_osmr0,
-};
-
-void __init pxa_timer_init(void)
-{
- unsigned long clock_tick_rate = get_clock_tick_rate();
-
- writel_relaxed(0, OIER);
- writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
-
- sched_clock_register(pxa_read_sched_clock, 32, clock_tick_rate);
-
- ckevt_pxa_osmr0.cpumask = cpumask_of(0);
-
- setup_irq(IRQ_OST0, &pxa_ost0_irq);
-
- clocksource_mmio_init(OSCR, "oscr0", clock_tick_rate, 200, 32,
- clocksource_mmio_readl_up);
- clockevents_config_and_register(&ckevt_pxa_osmr0, clock_tick_rate,
- MIN_OSCR_DELTA * 2, 0x7fffffff);
-}