include/timer.h

   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  * Get the current timer count
  12  *
  13  * @dev: The Timer device
  14  * @count: pointer that returns the current timer count
  15  * @return: 0 if OK, -ve on error
  16  */
  17 int timer_get_count(struct udevice *dev, unsigned long *count);
  18 /*
  19  * Get the timer input clock frequency
  20  *
  21  * @dev: The Timer device
  22  * @return: the timer input clock frequency
  23  */
  24 unsigned long timer_get_rate(struct udevice *dev);
  25
  26 /*
  27  * struct timer_ops - Driver model Timer operations
  28  *
  29  * The uclass interface is implemented by all Timer devices which use
  30  * driver model.
  31  */
  32 struct timer_ops {
  33         /*
  34          * Get the current timer count
  35          *
  36          * @dev: The Timer device
  37          * @count: pointer that returns the current timer count
  38          * @return: 0 if OK, -ve on error
  39          */
  40         int (*get_count)(struct udevice *dev, unsigned long *count);
  41 };
  42
  43 /*
  44  * struct timer_dev_priv - information about a device used by the uclass
  45  *
  46  * @clock_rate: the timer input clock frequency
  47  */
  48 struct timer_dev_priv {
  49         unsigned long clock_rate;
  50 };
  51
  52 #endif  /* _TIMER_H_ */