linux/drivers/clk/versatile/icst.h
Linus Walleij ba3fae06c7 ARM/clk: move the ICST library to drivers/clk
This moves the ICST clock divider helper library from
arch/arm/common to drivers/clk/versatile so it is maintained
with the other clock drivers.

We keep the structure as a helper library intact and do not
fuse it with the clk-icst.c Versatile ICST clock driver: there
may be other users out there that need to use this library for
their clocking, and then it will be helpful to keep the
library contained. (The icst.[c|h] files could just be moved
to drivers/clk/lib or a similar location to share the library.)

Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-04-07 11:58:12 +02:00

58 lines
1.7 KiB
C

/*
* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Support functions for calculating clocks/divisors for the ICST
* clock generators. See http://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