1 /* 2 * Copyright (c) 2015-2018, 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_ptr); 29 30 #endif /* DELAY_TIMER_H */ 31