diff options
Diffstat (limited to 'drivers/clk/versatile/icst.h')
| -rw-r--r-- | drivers/clk/versatile/icst.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/clk/versatile/icst.h b/drivers/clk/versatile/icst.h new file mode 100644 index 000000000..29622768b --- /dev/null +++ b/drivers/clk/versatile/icst.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. + * + * Support functions for calculating clocks/divisors for the ICST + * clock generators. See https://www.idt.com/ for more information + * on these devices. + */ +#ifndef ICST_H +#define ICST_H + +struct icst_params { + unsigned long ref; + unsigned long vco_max; /* inclusive */ + unsigned long vco_min; /* exclusive */ + unsigned short vd_min; /* inclusive */ + unsigned short vd_max; /* inclusive */ + unsigned char rd_min; /* inclusive */ + unsigned char rd_max; /* inclusive */ + const unsigned char *s2div; /* chip specific s2div array */ + const unsigned char *idx2s; /* chip specific idx2s array */ +}; + +struct icst_vco { + unsigned short v; + unsigned char r; + unsigned char s; +}; + +unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco); +struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq); + +/* + * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V). + * This frequency is pre-output divider. + */ +#define ICST307_VCO_MIN 6000000 +#define ICST307_VCO_MAX 200000000 + +extern const unsigned char icst307_s2div[]; +extern const unsigned char icst307_idx2s[]; + +/* + * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V). + * This frequency is pre-output divider. + */ +#define ICST525_VCO_MIN 10000000 +#define ICST525_VCO_MAX_3V 200000000 +#define ICST525_VCO_MAX_5V 320000000 + +extern const unsigned char icst525_s2div[]; +extern const unsigned char icst525_idx2s[]; + +#endif |