1 /*- 2 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifndef _DEV_CLK_FIXED_H_ 28 #define _DEV_CLK_FIXED_H_ 29 30 #include <dev/clk/clk.h> 31 32 /* 33 * A fixed clock can represent several different real-world objects, including 34 * an oscillator with a fixed output frequency, a fixed divider (multiplier and 35 * divisor must both be > 0), or a phase-fractional divider within a PLL 36 * (however the code currently divides first, then multiplies, potentially 37 * leading to different roundoff errors than the hardware PLL). 38 */ 39 40 struct clk_fixed_def { 41 struct clknode_init_def clkdef; 42 uint64_t freq; 43 uint32_t mult; 44 uint32_t div; 45 int fixed_flags; 46 }; 47 48 int clknode_fixed_register(struct clkdom *clkdom, struct clk_fixed_def *clkdef); 49 50 #endif /*_DEV_CLK_FIXED_H_*/ 51