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  * 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_ */