include/drivers/delay_timer.h

   1 /*
   2  * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #ifndef __DELAY_TIMER_H__
   8 #define __DELAY_TIMER_H__
   9
  10 #include <stdint.h>
  11
  12 /********************************************************************
  13  * A simple timer driver providing synchronous delay functionality.
  14  * The driver must be initialized with a structure that provides a
  15  * function pointer to return the timer value and a clock
  16  * multiplier/divider. The ratio of the multiplier and the divider is
  17  * the clock period in microseconds.
  18  ********************************************************************/
  19
  20 typedef struct timer_ops {
  21         uint32_t (*get_timer_value)(void);
  22         uint32_t clk_mult;
  23         uint32_t clk_div;
  24 } timer_ops_t;
  25
  26 void mdelay(uint32_t msec);
  27 void udelay(uint32_t usec);
  28 void timer_init(const timer_ops_t *ops);
  29
  30
  31 #endif /* __DELAY_TIMER_H__ */