55 lines · c
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 ICST6 * clock generators. See https://www.idt.com/ for more information7 * on these devices.8 */9#ifndef ICST_H10#define ICST_H11 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 600000038#define ICST307_VCO_MAX 20000000039 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 1000000048#define ICST525_VCO_MAX_3V 20000000049#define ICST525_VCO_MAX_5V 32000000050 51extern const unsigned char icst525_s2div[];52extern const unsigned char icst525_idx2s[];53 54#endif55