1 /* 2 * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #ifndef _TIMER_H_ 8 #define _TIMER_H_ 9 10 /* 11 * timer_conv_64 - convert 32-bit counter value to 64-bit 12 * 13 * @count: 32-bit counter value 14 * @return: 64-bit counter value 15 */ 16 u64 timer_conv_64(u32 count); 17 18 /* 19 * Get the current timer count 20 * 21 * @dev: The timer device 22 * @count: pointer that returns the current timer count 23 * @return: 0 if OK, -ve on error 24 */ 25 int timer_get_count(struct udevice *dev, u64 *count); 26 27 /* 28 * Get the timer input clock frequency 29 * 30 * @dev: The timer device 31 * @return: the timer input clock frequency 32 */ 33 unsigned long timer_get_rate(struct udevice *dev); 34 35 /* 36 * struct timer_ops - Driver model timer operations 37 * 38 * The uclass interface is implemented by all timer devices which use 39 * driver model. 40 */ 41 struct timer_ops { 42 /* 43 * Get the current timer count 44 * 45 * @dev: The timer device 46 * @count: pointer that returns the current 64-bit timer count 47 * @return: 0 if OK, -ve on error 48 */ 49 int (*get_count)(struct udevice *dev, u64 *count); 50 }; 51 52 /* 53 * struct timer_dev_priv - information about a device used by the uclass 54 * 55 * @clock_rate: the timer input clock frequency 56 */ 57 struct timer_dev_priv { 58 unsigned long clock_rate; 59 }; 60 61 #endif /* _TIMER_H_ */ 62