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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
- */
- #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_ */
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