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

source code of linux/drivers/clk/versatile/icst.h