include/clocksource/timer-davinci.h

   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__ */