/* 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_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_ */