#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
+ * @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, unsigned long *count);
+int timer_get_count(struct udevice *dev, u64 *count);
+
/*
* Get the timer input clock frequency
*
- * @dev: The Timer device
+ * @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
+ * struct timer_ops - Driver model timer operations
*
- * The uclass interface is implemented by all Timer devices which use
+ * 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 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, unsigned long *count);
+ int (*get_count)(struct udevice *dev, u64 *count);
};
/*
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_ */