Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* ip30-timer.c: Clocksource/clockevent support for the
|
|
* HEART chip in SGI Octane (IP30) systems.
|
|
*
|
|
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
|
|
* Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de>
|
|
* Copyright (C) 2011 Joshua Kinard <linux@kumba.dev>
|
|
*/
|
|
|
|
#include <linux/clocksource.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/sched_clock.h>
|
|
|
|
#include <asm/time.h>
|
|
#include <asm/cevt-r4k.h>
|
|
#include <asm/sgi/heart.h>
|
|
|
|
static u64 ip30_heart_counter_read(struct clocksource *cs)
|
|
{
|
|
return heart_read(&heart_regs->count);
|
|
}
|
|
|
|
struct clocksource ip30_heart_clocksource = {
|
|
.name = "HEART",
|
|
.rating = 400,
|
|
.read = ip30_heart_counter_read,
|
|
.mask = CLOCKSOURCE_MASK(52),
|
|
.flags = (CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_VALID_FOR_HRES),
|
|
};
|
|
|
|
static u64 notrace ip30_heart_read_sched_clock(void)
|
|
{
|
|
return heart_read(&heart_regs->count);
|
|
}
|
|
|
|
static void __init ip30_heart_clocksource_init(void)
|
|
{
|
|
struct clocksource *cs = &ip30_heart_clocksource;
|
|
|
|
clocksource_register_hz(cs, HEART_CYCLES_PER_SEC);
|
|
|
|
sched_clock_register(ip30_heart_read_sched_clock, 52,
|
|
HEART_CYCLES_PER_SEC);
|
|
}
|
|
|
|
void __init plat_time_init(void)
|
|
{
|
|
int irq = get_c0_compare_int();
|
|
|
|
cp0_timer_irq_installed = 1;
|
|
c0_compare_irqaction.percpu_dev_id = &mips_clockevent_device;
|
|
c0_compare_irqaction.flags &= ~IRQF_SHARED;
|
|
irq_set_handler(irq, handle_percpu_devid_irq);
|
|
irq_set_percpu_devid(irq);
|
|
setup_percpu_irq(irq, &c0_compare_irqaction);
|
|
enable_percpu_irq(irq, IRQ_TYPE_NONE);
|
|
|
|
ip30_heart_clocksource_init();
|
|
}
|