ptp.h

 1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 2/*
 3 * Copyright (C) 2025 Intel Corporation
 4 */
 5#ifndef __iwl_mld_ptp_h__
 6#define __iwl_mld_ptp_h__
 7
 8#include <linux/ptp_clock_kernel.h>
 9
10/**
11 * struct ptp_data - PTP hardware clock data
12 *
13 * @ptp_clock: struct ptp_clock pointer returned by the ptp_clock_register()
14 *	function.
15 * @ptp_clock_info: struct ptp_clock_info that describes a PTP hardware clock
16 * @lock: protects the time adjustments data
17 * @delta: delta between hardware clock and ptp clock in nanoseconds
18 * @scale_update_gp2: GP2 time when the scale was last updated
19 * @scale_update_adj_time_ns: adjusted time when the scale was last updated,
20 *	in nanoseconds
21 * @scaled_freq: clock frequency offset, scaled to 65536000000
22 * @last_gp2: the last GP2 reading from the hardware, used for tracking GP2
23 *	wraparounds
24 * @wrap_counter: number of wraparounds since scale_update_adj_time_ns
25 * @dwork: worker scheduled every 1 hour to detect workarounds
26 */
27struct ptp_data {
28	struct ptp_clock *ptp_clock;
29	struct ptp_clock_info ptp_clock_info;
30
31	spinlock_t lock;
32	s64 delta;
33	u32 scale_update_gp2;
34	u64 scale_update_adj_time_ns;
35	u64 scaled_freq;
36	u32 last_gp2;
37	u32 wrap_counter;
38	struct delayed_work dwork;
39};
40
41void iwl_mld_ptp_init(struct iwl_mld *mld);
42void iwl_mld_ptp_remove(struct iwl_mld *mld);
43u64 iwl_mld_ptp_get_adj_time(struct iwl_mld *mld, u64 base_time_ns);
44
45#endif /* __iwl_mld_ptp_h__ */