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Diffstat (limited to 'arch/arm/plat-iop/time.c')
| -rw-r--r-- | arch/arm/plat-iop/time.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c deleted file mode 100644 index f9dd1f50cfe5..000000000000 --- a/arch/arm/plat-iop/time.c +++ /dev/null @@ -1,182 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * arch/arm/plat-iop/time.c - * - * Timer code for IOP32x and IOP33x based systems - * - * Author: Deepak Saxena <dsaxena@mvista.com> - * - * Copyright 2002-2003 MontaVista Software Inc. - */ - -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/time.h> -#include <linux/init.h> -#include <linux/timex.h> -#include <linux/io.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> -#include <linux/export.h> -#include <linux/sched_clock.h> -#include <mach/hardware.h> -#include <asm/irq.h> -#include <linux/uaccess.h> -#include <asm/mach/irq.h> -#include <asm/mach/time.h> -#include <mach/time.h> - -/* - * Minimum clocksource/clockevent timer range in seconds - */ -#define IOP_MIN_RANGE 4 - -/* - * IOP clocksource (free-running timer 1). - */ -static u64 notrace iop_clocksource_read(struct clocksource *unused) -{ - return 0xffffffffu - read_tcr1(); -} - -static struct clocksource iop_clocksource = { - .name = "iop_timer1", - .rating = 300, - .read = iop_clocksource_read, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -/* - * IOP sched_clock() implementation via its clocksource. - */ -static u64 notrace iop_read_sched_clock(void) -{ - return 0xffffffffu - read_tcr1(); -} - -/* - * IOP clockevents (interrupting timer 0). - */ -static int iop_set_next_event(unsigned long delta, - struct clock_event_device *unused) -{ - u32 tmr = IOP_TMR_PRIVILEGED | IOP_TMR_RATIO_1_1; - - BUG_ON(delta == 0); - write_tmr0(tmr & ~(IOP_TMR_EN | IOP_TMR_RELOAD)); - write_tcr0(delta); - write_tmr0((tmr & ~IOP_TMR_RELOAD) | IOP_TMR_EN); - - return 0; -} - -static unsigned long ticks_per_jiffy; - -static int iop_set_periodic(struct clock_event_device *evt) -{ - u32 tmr = read_tmr0(); - - write_tmr0(tmr & ~IOP_TMR_EN); - write_tcr0(ticks_per_jiffy - 1); - write_trr0(ticks_per_jiffy - 1); - tmr |= (IOP_TMR_RELOAD | IOP_TMR_EN); - - write_tmr0(tmr); - return 0; -} - -static int iop_set_oneshot(struct clock_event_device *evt) -{ - u32 tmr = read_tmr0(); - - /* ->set_next_event sets period and enables timer */ - tmr &= ~(IOP_TMR_RELOAD | IOP_TMR_EN); - write_tmr0(tmr); - return 0; -} - -static int iop_shutdown(struct clock_event_device *evt) -{ - u32 tmr = read_tmr0(); - - tmr &= ~IOP_TMR_EN; - write_tmr0(tmr); - return 0; -} - -static int iop_resume(struct clock_event_device *evt) -{ - u32 tmr = read_tmr0(); - - tmr |= IOP_TMR_EN; - write_tmr0(tmr); - return 0; -} - -static struct clock_event_device iop_clockevent = { - .name = "iop_timer0", - .features = CLOCK_EVT_FEAT_PERIODIC | - CLOCK_EVT_FEAT_ONESHOT, - .rating = 300, - .set_next_event = iop_set_next_event, - .set_state_shutdown = iop_shutdown, - .set_state_periodic = iop_set_periodic, - .tick_resume = iop_resume, - .set_state_oneshot = iop_set_oneshot, -}; - -static irqreturn_t -iop_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; - - write_tisr(1); - evt->event_handler(evt); - return IRQ_HANDLED; -} - -static struct irqaction iop_timer_irq = { - .name = "IOP Timer Tick", - .handler = iop_timer_interrupt, - .flags = IRQF_TIMER | IRQF_IRQPOLL, - .dev_id = &iop_clockevent, -}; - -static unsigned long iop_tick_rate; -unsigned long get_iop_tick_rate(void) -{ - return iop_tick_rate; -} -EXPORT_SYMBOL(get_iop_tick_rate); - -void __init iop_init_time(unsigned long tick_rate) -{ - u32 timer_ctl; - - sched_clock_register(iop_read_sched_clock, 32, tick_rate); - - ticks_per_jiffy = DIV_ROUND_CLOSEST(tick_rate, HZ); - iop_tick_rate = tick_rate; - - timer_ctl = IOP_TMR_EN | IOP_TMR_PRIVILEGED | - IOP_TMR_RELOAD | IOP_TMR_RATIO_1_1; - - /* - * Set up interrupting clockevent timer 0. - */ - write_tmr0(timer_ctl & ~IOP_TMR_EN); - write_tisr(1); - setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq); - iop_clockevent.cpumask = cpumask_of(0); - clockevents_config_and_register(&iop_clockevent, tick_rate, - 0xf, 0xfffffffe); - - /* - * Set up free-running clocksource timer 1. - */ - write_trr1(0xffffffff); - write_tcr1(0xffffffff); - write_tmr1(timer_ctl); - clocksource_register_hz(&iop_clocksource, tick_rate); -} |