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_DIV_H_ 28 #define _DEV_CLK_DIV_H_ 29 30 #include <dev/clk/clk.h> 31 32 #define CLK_DIV_ZERO_BASED 0x0001 /* Zero based divider. */ 33 #define CLK_DIV_WITH_TABLE 0x0002 /* Table to lookup the real value */ 34 35 struct clk_div_table { 36 uint32_t value; 37 uint32_t divider; 38 }; 39 40 struct clk_div_def { 41 struct clknode_init_def clkdef; 42 uint32_t offset; /* Divider register offset */ 43 uint32_t i_shift; /* Pos of div bits in reg */ 44 uint32_t i_width; /* Width of div bit field */ 45 uint32_t f_shift; /* Fractional divide bits, */ 46 uint32_t f_width; /* set to 0 for int divider */ 47 int div_flags; /* Divider-specific flags */ 48 struct clk_div_table *div_table; /* Divider table */ 49 }; 50 51 int clknode_div_register(struct clkdom *clkdom, struct clk_div_def *clkdef); 52 53 #endif /*_DEV_CLK_DIV_H_*/ 54