Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2018-2020 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #ifndef _IPA_CLOCK_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #define _IPA_CLOCK_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) struct device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) struct ipa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * ipa_clock_rate() - Return the current IPA core clock rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * @ipa:	IPA structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * Return: The current clock rate (in Hz), or 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u32 ipa_clock_rate(struct ipa *ipa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  * ipa_clock_init() - Initialize IPA clocking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * @dev:	IPA device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * Return:	A pointer to an ipa_clock structure, or a pointer-coded error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct ipa_clock *ipa_clock_init(struct device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  * ipa_clock_exit() - Inverse of ipa_clock_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  * @clock:	IPA clock pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) void ipa_clock_exit(struct ipa_clock *clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * ipa_clock_get() - Get an IPA clock reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  * @ipa:	IPA pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  * This call blocks if this is the first reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void ipa_clock_get(struct ipa *ipa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  * ipa_clock_get_additional() - Get an IPA clock reference if not first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  * @ipa:	IPA pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  * This returns immediately, and only takes a reference if not the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) bool ipa_clock_get_additional(struct ipa *ipa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)  * ipa_clock_put() - Drop an IPA clock reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)  * @ipa:	IPA pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)  * This drops a clock reference.  If the last reference is being dropped,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)  * the clock is stopped and RX endpoints are suspended.  This call will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)  * not block unless the last reference is dropped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) void ipa_clock_put(struct ipa *ipa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #endif /* _IPA_CLOCK_H_ */