mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
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*/
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#ifndef _TIMER_H_
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#define _TIMER_H_
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/*
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* dm_timer_init - initialize a timer for time keeping. On success
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* initializes gd->timer so that lib/timer can use it for future
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* referrence.
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*
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* @return - 0 on success or error number
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*/
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int dm_timer_init(void);
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/*
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* timer_conv_64 - convert 32-bit counter value to 64-bit
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*
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* @count: 32-bit counter value
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* @return: 64-bit counter value
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*/
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u64 timer_conv_64(u32 count);
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/*
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* Get the current timer count
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*
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* @dev: The timer device
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* @count: pointer that returns the current timer count
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* @return: 0 if OK, -ve on error
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*/
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int timer_get_count(struct udevice *dev, u64 *count);
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/*
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* Get the timer input clock frequency
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*
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* @dev: The timer device
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* @return: the timer input clock frequency
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*/
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unsigned long timer_get_rate(struct udevice *dev);
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/*
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* struct timer_ops - Driver model timer operations
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*
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* The uclass interface is implemented by all timer devices which use
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* driver model.
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*/
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struct timer_ops {
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/*
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* Get the current timer count
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*
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* @dev: The timer device
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* @count: pointer that returns the current 64-bit timer count
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* @return: 0 if OK, -ve on error
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*/
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int (*get_count)(struct udevice *dev, u64 *count);
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};
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/*
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* struct timer_dev_priv - information about a device used by the uclass
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*
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* @clock_rate: the timer input clock frequency
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*/
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struct timer_dev_priv {
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unsigned long clock_rate;
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};
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/**
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* timer_early_get_count() - Implement timer_get_count() before driver model
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*
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* If CONFIG_TIMER_EARLY is enabled, this function wil be called to return
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* the current timer value before the proper driver model timer is ready.
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* It should be implemented by one of the timer values. This is mostly useful
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* for tracing.
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*/
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u64 timer_early_get_count(void);
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/**
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* timer_early_get_rate() - Get the timer rate before driver model
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*
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* If CONFIG_TIMER_EARLY is enabled, this function wil be called to return
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* the current timer rate in Hz before the proper driver model timer is ready.
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* It should be implemented by one of the timer values. This is mostly useful
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* for tracing. This corresponds to the clock_rate value in struct
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* timer_dev_priv.
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*/
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unsigned long timer_early_get_rate(void);
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#endif /* _TIMER_H_ */
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