include/clocksource/timer-davinci.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * TI DaVinci clocksource driver
0004  *
0005  * Copyright (C) 2019 Texas Instruments
0006  * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
0007  */
0008
0009 #ifndef __TIMER_DAVINCI_H__
0010 #define __TIMER_DAVINCI_H__
0011
0012 #include <linux/clk.h>
0013 #include <linux/ioport.h>
0014
0015 enum {
0016     DAVINCI_TIMER_CLOCKEVENT_IRQ,
0017     DAVINCI_TIMER_CLOCKSOURCE_IRQ,
0018     DAVINCI_TIMER_NUM_IRQS,
0019 };
0020
0021 /**
0022  * struct davinci_timer_cfg - davinci clocksource driver configuration struct
0023  * @reg:        register range resource
0024  * @irq:        clockevent and clocksource interrupt resources
0025  * @cmp_off:    if set - it specifies the compare register used for clockevent
0026  *
0027  * Note: if the compare register is specified, the driver will use the bottom
0028  * clock half for both clocksource and clockevent and the compare register
0029  * to generate event irqs. The user must supply the correct compare register
0030  * interrupt number.
0031  *
0032  * This is only used by da830 the DSP of which uses the top half. The timer
0033  * driver still configures the top half to run in free-run mode.
0034  */
0035 struct davinci_timer_cfg {
0036     struct resource reg;
0037     struct resource irq[DAVINCI_TIMER_NUM_IRQS];
0038     unsigned int cmp_off;
0039 };
0040
0041 int __init davinci_timer_register(struct clk *clk,
0042                   const struct davinci_timer_cfg *data);
0043
0044 #endif /* __TIMER_DAVINCI_H__ */