1 /* $NetBSD: clk_backend.h,v 1.4 2018/04/28 15:20:33 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _DEV_CLK_CLK_BACKEND_H 30 #define _DEV_CLK_CLK_BACKEND_H 31 32 #include <sys/sysctl.h> 33 34 #include <dev/clk/clk.h> 35 36 struct clk_domain { 37 const char *name; 38 const struct sysctlnode *node; 39 const struct clk_funcs *funcs; 40 void *priv; 41 }; 42 43 struct clk { 44 struct clk_domain *domain; 45 const char *name; 46 u_int flags; 47 #define CLK_SET_RATE_PARENT 0x01 48 }; 49 50 struct clk_funcs { 51 struct clk *(*get)(void *, const char *); 52 void (*put)(void *, struct clk *); 53 54 u_int (*get_rate)(void *, struct clk *); 55 int (*set_rate)(void *, struct clk *, u_int); 56 u_int (*round_rate)(void *, struct clk *, u_int); 57 int (*enable)(void *, struct clk *); 58 int (*disable)(void *, struct clk *); 59 int (*set_parent)(void *, struct clk *, struct clk *); 60 struct clk *(*get_parent)(void *, struct clk *); 61 }; 62 63 int clk_attach(struct clk *); 64 65 #endif /* _DEV_CLK_CLK_BACKEND_H */ 66