drivers/ptp/ptp_fc3.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * PTP hardware clock driver for the FemtoClock3 family of timing and
   4  * synchronization devices.
   5  *
   6  * Copyright (C) 2023 Integrated Device Technology, Inc., a Renesas Company.
   7  */
   8 #ifndef PTP_IDTFC3_H
   9 #define PTP_IDTFC3_H
  10
  11 #include <linux/ktime.h>
  12 #include <linux/ptp_clock.h>
  13 #include <linux/regmap.h>
  14
  15 #define FW_FILENAME     "idtfc3.bin"
  16
  17 #define MAX_FFO_PPB     (244000)
  18 #define TDC_GET_PERIOD  (10)
  19
  20 struct idtfc3 {
  21         struct ptp_clock_info   caps;
  22         struct ptp_clock        *ptp_clock;
  23         struct device           *dev;
  24         /* Mutex to protect operations from being interrupted */
  25         struct mutex            *lock;
  26         struct device           *mfd;
  27         struct regmap           *regmap;
  28         struct idtfc3_hw_param  hw_param;
  29         u32                     sub_sync_count;
  30         u32                     ns_per_sync;
  31         int                     tdc_offset_sign;
  32         u64                     tdc_apll_freq;
  33         u32                     time_ref_freq;
  34         u16                     fod_n;
  35         u8                      lpf_mode;
  36         /* Time counter */
  37         u32                     last_counter;
  38         s64                     ns;
  39         u32                     ns_per_counter;
  40         u32                     tc_update_period;
  41         u32                     tc_write_timeout;
  42         s64                     tod_write_overhead;
  43 };
  44
  45 #endif /* PTP_IDTFC3_H */