LXR linux/drivers/clk/versatile/icst.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
   4 *
   5 *  Support functions for calculating clocks/divisors for the ICST
   6 *  clock generators.  See https://www.idt.com/ for more information
   7 *  on these devices.
   8 */
   9#ifndef ICST_H
  10#define ICST_H
  11
  12struct icst_params {
  13        unsigned long   ref;
  14        unsigned long   vco_max;        /* inclusive */
  15        unsigned long   vco_min;        /* exclusive */
  16        unsigned short  vd_min;         /* inclusive */
  17        unsigned short  vd_max;         /* inclusive */
  18        unsigned char   rd_min;         /* inclusive */
  19        unsigned char   rd_max;         /* inclusive */
  20        const unsigned char *s2div;     /* chip specific s2div array */
  21        const unsigned char *idx2s;     /* chip specific idx2s array */
  22};
  23
  24struct icst_vco {
  25        unsigned short  v;
  26        unsigned char   r;
  27        unsigned char   s;
  28};
  29
  30unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
  31struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
  32
  33/*
  34 * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
  35 * This frequency is pre-output divider.
  36 */
  37#define ICST307_VCO_MIN 6000000
  38#define ICST307_VCO_MAX 200000000
  39
  40extern const unsigned char icst307_s2div[];
  41extern const unsigned char icst307_idx2s[];
  42
  43/*
  44 * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
  45 * This frequency is pre-output divider.
  46 */
  47#define ICST525_VCO_MIN         10000000
  48#define ICST525_VCO_MAX_3V      200000000
  49#define ICST525_VCO_MAX_5V      320000000
  50
  51extern const unsigned char icst525_s2div[];
  52extern const unsigned char icst525_idx2s[];
  53
  54#endif
  55