53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
/*-
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* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_EXTRES_CLK_FIXED_H_
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#define _DEV_EXTRES_CLK_FIXED_H_
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#include <dev/extres/clk/clk.h>
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/*
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* A fixed clock can represent several different real-world objects, including
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* an oscillator with a fixed output frequency, a fixed divider (multiplier and
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* divisor must both be > 0), or a phase-fractional divider within a PLL
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* (however the code currently divides first, then multiplies, potentially
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* leading to different roundoff errors than the hardware PLL).
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*/
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struct clk_fixed_def {
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struct clknode_init_def clkdef;
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uint64_t freq;
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uint32_t mult;
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uint32_t div;
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int fixed_flags;
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};
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int clknode_fixed_register(struct clkdom *clkdom, struct clk_fixed_def *clkdef);
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#endif /*_DEV_EXTRES_CLK_FIXED_H_*/
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