forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.3 KiB
90 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
|
/* |
|
* Copyright (C) 2015 Thomas Chou <[email protected]> |
|
*/ |
|
|
|
#ifndef _TIMER_H_ |
|
#define _TIMER_H_ |
|
|
|
/* |
|
* dm_timer_init - initialize a timer for time keeping. On success |
|
* initializes gd->timer so that lib/timer can use it for future |
|
* referrence. |
|
* |
|
* @return - 0 on success or error number |
|
*/ |
|
int dm_timer_init(void); |
|
|
|
/* |
|
* timer_conv_64 - convert 32-bit counter value to 64-bit |
|
* |
|
* @count: 32-bit counter value |
|
* @return: 64-bit counter value |
|
*/ |
|
u64 timer_conv_64(u32 count); |
|
|
|
/* |
|
* Get the current timer count |
|
* |
|
* @dev: The timer device |
|
* @count: pointer that returns the current timer count |
|
* @return: 0 if OK, -ve on error |
|
*/ |
|
int timer_get_count(struct udevice *dev, u64 *count); |
|
|
|
/* |
|
* Get the timer input clock frequency |
|
* |
|
* @dev: The timer device |
|
* @return: the timer input clock frequency |
|
*/ |
|
unsigned long timer_get_rate(struct udevice *dev); |
|
|
|
/* |
|
* struct timer_ops - Driver model timer operations |
|
* |
|
* The uclass interface is implemented by all timer devices which use |
|
* driver model. |
|
*/ |
|
struct timer_ops { |
|
/* |
|
* Get the current timer count |
|
* |
|
* @dev: The timer device |
|
* @count: pointer that returns the current 64-bit timer count |
|
* @return: 0 if OK, -ve on error |
|
*/ |
|
int (*get_count)(struct udevice *dev, u64 *count); |
|
}; |
|
|
|
/* |
|
* struct timer_dev_priv - information about a device used by the uclass |
|
* |
|
* @clock_rate: the timer input clock frequency |
|
*/ |
|
struct timer_dev_priv { |
|
unsigned long clock_rate; |
|
}; |
|
|
|
/** |
|
* timer_early_get_count() - Implement timer_get_count() before driver model |
|
* |
|
* If CONFIG_TIMER_EARLY is enabled, this function wil be called to return |
|
* the current timer value before the proper driver model timer is ready. |
|
* It should be implemented by one of the timer values. This is mostly useful |
|
* for tracing. |
|
*/ |
|
u64 timer_early_get_count(void); |
|
|
|
/** |
|
* timer_early_get_rate() - Get the timer rate before driver model |
|
* |
|
* If CONFIG_TIMER_EARLY is enabled, this function wil be called to return |
|
* the current timer rate in Hz before the proper driver model timer is ready. |
|
* It should be implemented by one of the timer values. This is mostly useful |
|
* for tracing. This corresponds to the clock_rate value in struct |
|
* timer_dev_priv. |
|
*/ |
|
unsigned long timer_early_get_rate(void); |
|
|
|
#endif /* _TIMER_H_ */
|
|
|