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clk_backend.h revision 1.2 
      1 /* $NetBSD: clk_backend.h,v 1.2 2017/04/16 12:28:21 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 <dev/clk/clk.h>
     33 
     34 struct clk_domain {
     35 	const struct clk_funcs *funcs;
     36 	void *priv;
     37 };
     38 
     39 struct clk {
     40 	struct clk_domain *domain;
     41         const char *name;
     42         u_int flags;
     43 #define CLK_SET_RATE_PARENT     0x01
     44 };
     45 
     46 struct clk_funcs {
     47 	struct clk *(*get)(void *, const char *);
     48 	void (*put)(void *, struct clk *);
     49 
     50 	u_int (*get_rate)(void *, struct clk *);
     51 	int (*set_rate)(void *, struct clk *, u_int);
     52 	int (*enable)(void *, struct clk *);
     53 	int (*disable)(void *, struct clk *);
     54 	int (*set_parent)(void *, struct clk *, struct clk *);
     55 	struct clk *(*get_parent)(void *, struct clk *);
     56 };
     57 
     58 #endif /* _DEV_CLK_CLK_BACKEND_H */
     59