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__ */