forked from Minki/linux
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
/*
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* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Support functions for calculating clocks/divisors for the ICST
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* clock generators. See http://www.idt.com/ for more information
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* on these devices.
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*/
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#ifndef ICST_H
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#define ICST_H
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struct icst_params {
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unsigned long ref;
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unsigned long vco_max; /* inclusive */
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unsigned long vco_min; /* exclusive */
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unsigned short vd_min; /* inclusive */
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unsigned short vd_max; /* inclusive */
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unsigned char rd_min; /* inclusive */
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unsigned char rd_max; /* inclusive */
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const unsigned char *s2div; /* chip specific s2div array */
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const unsigned char *idx2s; /* chip specific idx2s array */
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};
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struct icst_vco {
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unsigned short v;
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unsigned char r;
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unsigned char s;
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};
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unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
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struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
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/*
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* ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
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* This frequency is pre-output divider.
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*/
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#define ICST307_VCO_MIN 6000000
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#define ICST307_VCO_MAX 200000000
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extern const unsigned char icst307_s2div[];
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extern const unsigned char icst307_idx2s[];
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/*
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* ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
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* This frequency is pre-output divider.
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*/
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#define ICST525_VCO_MIN 10000000
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#define ICST525_VCO_MAX_3V 200000000
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#define ICST525_VCO_MAX_5V 320000000
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extern const unsigned char icst525_s2div[];
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extern const unsigned char icst525_idx2s[];
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#endif
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