62 строки
1.5 KiB
C
62 строки
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
|
|
* Copyright (C) 2018-2020 Linaro Ltd.
|
|
*/
|
|
#ifndef _IPA_CLOCK_H_
|
|
#define _IPA_CLOCK_H_
|
|
|
|
struct device;
|
|
|
|
struct ipa;
|
|
|
|
/**
|
|
* ipa_clock_rate() - Return the current IPA core clock rate
|
|
* @ipa: IPA structure
|
|
*
|
|
* Return: The current clock rate (in Hz), or 0.
|
|
*/
|
|
u32 ipa_clock_rate(struct ipa *ipa);
|
|
|
|
/**
|
|
* ipa_clock_init() - Initialize IPA clocking
|
|
* @dev: IPA device
|
|
*
|
|
* Return: A pointer to an ipa_clock structure, or a pointer-coded error
|
|
*/
|
|
struct ipa_clock *ipa_clock_init(struct device *dev);
|
|
|
|
/**
|
|
* ipa_clock_exit() - Inverse of ipa_clock_init()
|
|
* @clock: IPA clock pointer
|
|
*/
|
|
void ipa_clock_exit(struct ipa_clock *clock);
|
|
|
|
/**
|
|
* ipa_clock_get() - Get an IPA clock reference
|
|
* @ipa: IPA pointer
|
|
*
|
|
* This call blocks if this is the first reference.
|
|
*/
|
|
void ipa_clock_get(struct ipa *ipa);
|
|
|
|
/**
|
|
* ipa_clock_get_additional() - Get an IPA clock reference if not first
|
|
* @ipa: IPA pointer
|
|
*
|
|
* This returns immediately, and only takes a reference if not the first
|
|
*/
|
|
bool ipa_clock_get_additional(struct ipa *ipa);
|
|
|
|
/**
|
|
* ipa_clock_put() - Drop an IPA clock reference
|
|
* @ipa: IPA pointer
|
|
*
|
|
* This drops a clock reference. If the last reference is being dropped,
|
|
* the clock is stopped and RX endpoints are suspended. This call will
|
|
* not block unless the last reference is dropped.
|
|
*/
|
|
void ipa_clock_put(struct ipa *ipa);
|
|
|
|
#endif /* _IPA_CLOCK_H_ */
|