From 8560a6cfc9818edde1fd8677961714b264ffa03d Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 9 Jun 2011 13:08:28 +0000 Subject: [PATCH] arm: Footbridge: Use common i8253 clockevent Signed-off-by: Thomas Gleixner Cc: Russell King Cc: Ralf Baechle Cc: John Stultz Link: http://lkml.kernel.org/r/20110609130622.241312122@linutronix.de --- arch/arm/mach-footbridge/Kconfig | 1 + arch/arm/mach-footbridge/isa-timer.c | 55 ++-------------------------- 2 files changed, 4 insertions(+), 52 deletions(-) diff --git a/arch/arm/mach-footbridge/Kconfig b/arch/arm/mach-footbridge/Kconfig index 46adca068f2c..dc26fff22cf0 100644 --- a/arch/arm/mach-footbridge/Kconfig +++ b/arch/arm/mach-footbridge/Kconfig @@ -5,6 +5,7 @@ menu "Footbridge Implementations" config ARCH_CATS bool "CATS" select CLKSRC_I8253 + select CLKEVT_I8253 select FOOTBRIDGE_HOST select ISA select ISA_DMA diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c index 71fd96df7f73..c40bb415f4b5 100644 --- a/arch/arm/mach-footbridge/isa-timer.c +++ b/arch/arm/mach-footbridge/isa-timer.c @@ -5,12 +5,10 @@ * Copyright (C) 1998 Phil Blundell */ #include -#include #include #include #include #include -#include #include #include @@ -19,48 +17,6 @@ #include "common.h" -static void pit_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - unsigned long flags; - - raw_local_irq_save(flags); - - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - outb_p(0x34, PIT_MODE); - outb_p(PIT_LATCH & 0xff, PIT_CH0); - outb_p(PIT_LATCH >> 8, PIT_CH0); - break; - - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_UNUSED: - outb_p(0x30, PIT_MODE); - outb_p(0, PIT_CH0); - outb_p(0, PIT_CH0); - break; - - case CLOCK_EVT_MODE_ONESHOT: - case CLOCK_EVT_MODE_RESUME: - break; - } - local_irq_restore(flags); -} - -static int pit_set_next_event(unsigned long delta, - struct clock_event_device *evt) -{ - return 0; -} - -static struct clock_event_device pit_ce = { - .name = "pit", - .features = CLOCK_EVT_FEAT_PERIODIC, - .set_mode = pit_set_mode, - .set_next_event = pit_set_next_event, - .shift = 32, -}; - static irqreturn_t pit_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *ce = dev_id; @@ -72,20 +28,15 @@ static struct irqaction pit_timer_irq = { .name = "pit", .handler = pit_timer_interrupt, .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, - .dev_id = &pit_ce, + .dev_id = &i8253_clockevent, }; static void __init isa_timer_init(void) { - pit_ce.cpumask = cpumask_of(smp_processor_id()); - pit_ce.mult = div_sc(PIT_TICK_RATE, NSEC_PER_SEC, pit_ce.shift); - pit_ce.max_delta_ns = clockevent_delta2ns(0x7fff, &pit_ce); - pit_ce.min_delta_ns = clockevent_delta2ns(0x000f, &pit_ce); - clocksource_i8253_init(); - setup_irq(pit_ce.irq, &pit_timer_irq); - clockevents_register_device(&pit_ce); + setup_irq(i8253_clockevent.irq, &pit_timer_irq); + clockevent_i8253_init(false); } struct sys_timer isa_timer = { -- 2.20.1