linux-stable/include/linux/dw_apb_timer.h
afzal mohammed cc2550b421 clocksource: Replace setup_irq() by request_irq()
request_irq() is preferred over setup_irq(). The early boot setup_irq()
invocations happen either via 'init_IRQ()' or 'time_init()', while
memory allocators are ready by 'mm_init()'.

Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were initialized.

Hence replace setup_irq() by request_irq().

Seldom remove_irq() usage has been observed coupled with setup_irq(),
wherever that has been found, it too has been replaced by free_irq().

A build error that was reported by kbuild test robot <lkp@intel.com>
in the previous version of the patch also has been fixed.

[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos

Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/91961c77c1cf93d41523f5e1ac52043f32f97077.1582799709.git.afzal.mohd.ma@gmail.com
2020-02-27 12:15:24 +01:00

51 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* (C) Copyright 2009 Intel Corporation
* Author: Jacob Pan (jacob.jun.pan@intel.com)
*
* Shared with ARM platforms, Jamie Iles, Picochip 2011
*
* Support for the Synopsys DesignWare APB Timers.
*/
#ifndef __DW_APB_TIMER_H__
#define __DW_APB_TIMER_H__
#include <linux/clockchips.h>
#include <linux/clocksource.h>
#include <linux/interrupt.h>
#define APBTMRS_REG_SIZE 0x14
struct dw_apb_timer {
void __iomem *base;
unsigned long freq;
int irq;
};
struct dw_apb_clock_event_device {
struct clock_event_device ced;
struct dw_apb_timer timer;
void (*eoi)(struct dw_apb_timer *);
};
struct dw_apb_clocksource {
struct dw_apb_timer timer;
struct clocksource cs;
};
void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced);
void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced);
void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced);
void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced);
struct dw_apb_clock_event_device *
dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
void __iomem *base, int irq, unsigned long freq);
struct dw_apb_clocksource *
dw_apb_clocksource_init(unsigned rating, const char *name, void __iomem *base,
unsigned long freq);
void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs);
void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
u64 dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
#endif /* __DW_APB_TIMER_H__ */