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      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 (at) 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