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9ca07ebbac
There are timers with a 64-bit counter value but current timer uclass driver assumes a 32-bit one. Modify timer_get_count() to ask timer driver to always return a 64-bit counter value, and provide an inline helper function timer_conv_64() to handle the 32-bit/64-bit conversion automatically. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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* 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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#endif /* _TIMER_H_ */
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