mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
06c3df4952
The APB timers are an IP block from Synopsys (DesignWare APB timers) and are also found in other systems including ARM SoC's. This patch adds functions for creating clock_event_devices and clocksources from APB timers but does not do the resource allocation. This is handled in a higher layer to allow the timers to be created from multiple methods such as platform_devices. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
|
|
* (C) Copyright 2009 Intel Corporation
|
|
* Author: Jacob Pan (jacob.jun.pan@intel.com)
|
|
*
|
|
* Shared with ARM platforms, Jamie Iles, Picochip 2011
|
|
*
|
|
* 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.
|
|
*
|
|
* 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;
|
|
struct irqaction irqaction;
|
|
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, 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);
|
|
cycle_t dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
|
|
void dw_apb_clocksource_unregister(struct dw_apb_clocksource *dw_cs);
|
|
|
|
#endif /* __DW_APB_TIMER_H__ */
|