mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 22:14:20 +08:00
ba3fae06c7
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>
58 lines
1.7 KiB
C
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
|