1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * (C) Copyright 2009 Intel Corporation
4  * Author: Jacob Pan (jacob.jun.pan@intel.com)
5  *
6  * Shared with ARM platforms, Jamie Iles, Picochip 2011
7  *
8  * Support for the Synopsys DesignWare APB Timers.
9  */
10 #ifndef __DW_APB_TIMER_H__
11 #define __DW_APB_TIMER_H__
12 
13 #include <linux/clockchips.h>
14 #include <linux/clocksource.h>
15 #include <linux/interrupt.h>
16 
17 #define APBTMRS_REG_SIZE       0x14
18 
19 struct dw_apb_timer {
20 	void __iomem				*base;
21 	unsigned long				freq;
22 	int					irq;
23 };
24 
25 struct dw_apb_clock_event_device {
26 	struct clock_event_device		ced;
27 	struct dw_apb_timer			timer;
28 	void					(*eoi)(struct dw_apb_timer *);
29 };
30 
31 struct dw_apb_clocksource {
32 	struct dw_apb_timer			timer;
33 	struct clocksource			cs;
34 };
35 
36 void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced);
37 void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced);
38 void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced);
39 void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced);
40 
41 struct dw_apb_clock_event_device *
42 dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
43 		       void __iomem *base, int irq, unsigned long freq);
44 struct dw_apb_clocksource *
45 dw_apb_clocksource_init(unsigned rating, const char *name, void __iomem *base,
46 			unsigned long freq);
47 void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs);
48 void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
49 u64 dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
50 
51 #endif /* __DW_APB_TIMER_H__ */
52