1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * TI DaVinci clocksource driver
4  *
5  * Copyright (C) 2019 Texas Instruments
6  * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
7  */
8 
9 #ifndef __TIMER_DAVINCI_H__
10 #define __TIMER_DAVINCI_H__
11 
12 #include <linux/clk.h>
13 #include <linux/ioport.h>
14 
15 enum {
16 	DAVINCI_TIMER_CLOCKEVENT_IRQ,
17 	DAVINCI_TIMER_CLOCKSOURCE_IRQ,
18 	DAVINCI_TIMER_NUM_IRQS,
19 };
20 
21 /**
22  * struct davinci_timer_cfg - davinci clocksource driver configuration struct
23  * @reg:        register range resource
24  * @irq:        clockevent and clocksource interrupt resources
25  * @cmp_off:    if set - it specifies the compare register used for clockevent
26  *
27  * Note: if the compare register is specified, the driver will use the bottom
28  * clock half for both clocksource and clockevent and the compare register
29  * to generate event irqs. The user must supply the correct compare register
30  * interrupt number.
31  *
32  * This is only used by da830 the DSP of which uses the top half. The timer
33  * driver still configures the top half to run in free-run mode.
34  */
35 struct davinci_timer_cfg {
36 	struct resource reg;
37 	struct resource irq[DAVINCI_TIMER_NUM_IRQS];
38 	unsigned int cmp_off;
39 };
40 
41 int __init davinci_timer_register(struct clk *clk,
42 				  const struct davinci_timer_cfg *data);
43 
44 #endif /* __TIMER_DAVINCI_H__ */
45