include/linux/dw_apb_timer.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * (C) Copyright 2009 Intel Corporation
0004  * Author: Jacob Pan (jacob.jun.pan@intel.com)
0005  *
0006  * Shared with ARM platforms, Jamie Iles, Picochip 2011
0007  *
0008  * Support for the Synopsys DesignWare APB Timers.
0009  */
0010 #ifndef __DW_APB_TIMER_H__
0011 #define __DW_APB_TIMER_H__
0012
0013 #include <linux/clockchips.h>
0014 #include <linux/clocksource.h>
0015 #include <linux/interrupt.h>
0016
0017 #define APBTMRS_REG_SIZE       0x14
0018
0019 struct dw_apb_timer {
0020     void __iomem                *base;
0021     unsigned long               freq;
0022     int                 irq;
0023 };
0024
0025 struct dw_apb_clock_event_device {
0026     struct clock_event_device       ced;
0027     struct dw_apb_timer         timer;
0028     void                    (*eoi)(struct dw_apb_timer *);
0029 };
0030
0031 struct dw_apb_clocksource {
0032     struct dw_apb_timer         timer;
0033     struct clocksource          cs;
0034 };
0035
0036 void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced);
0037 void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced);
0038 void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced);
0039 void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced);
0040
0041 struct dw_apb_clock_event_device *
0042 dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
0043                void __iomem *base, int irq, unsigned long freq);
0044 struct dw_apb_clocksource *
0045 dw_apb_clocksource_init(unsigned rating, const char *name, void __iomem *base,
0046             unsigned long freq);
0047 void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs);
0048 void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
0049 u64 dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
0050
0051 #endif /* __DW_APB_TIMER_H__ */