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 #include <sys/param.h> 28 #include <sys/conf.h> 29 #include <sys/bus.h> 30 #include <sys/kernel.h> 31 #include <sys/kobj.h> 32 #include <sys/malloc.h> 33 #include <sys/mutex.h> 34 #include <sys/module.h> 35 #include <sys/rman.h> 36 #include <sys/systm.h> 37 38 #include <machine/bus.h> 39 40 #include <dev/clk/clk_link.h> 41 42 static int clknode_link_init(struct clknode *clk, device_t dev); 43 static int clknode_link_recalc(struct clknode *clk, uint64_t *freq); 44 static int clknode_link_set_freq(struct clknode *clk, uint64_t fin, 45 uint64_t *fout, int flags, int *stop); 46 static int clknode_link_set_mux(struct clknode *clk, int idx); 47 static int clknode_link_set_gate(struct clknode *clk, bool enable); 48 49 static clknode_method_t clknode_link_methods[] = { 50 /* Device interface */ 51 CLKNODEMETHOD(clknode_init, clknode_link_init), 52 CLKNODEMETHOD(clknode_recalc_freq, clknode_link_recalc), 53 CLKNODEMETHOD(clknode_set_freq, clknode_link_set_freq), 54 CLKNODEMETHOD(clknode_set_gate, clknode_link_set_gate), 55 CLKNODEMETHOD(clknode_set_mux, clknode_link_set_mux), 56 CLKNODEMETHOD_END 57 }; 58 DEFINE_CLASS_1(clknode_link, clknode_link_class, clknode_link_methods, 59 0, clknode_class); 60 61 static int 62 clknode_link_init(struct clknode *clk, device_t dev) 63 { 64 return(0); 65 } 66 67 static int 68 clknode_link_recalc(struct clknode *clk, uint64_t *freq) 69 { 70 71 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 72 clknode_get_name(clk)); 73 return (EBADF); 74 } 75 76 static int 77 clknode_link_set_freq(struct clknode *clk, uint64_t fin, uint64_t *fout, 78 int flags, int *stop) 79 { 80 81 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 82 clknode_get_name(clk)); 83 return (EBADF); 84 } 85 86 static int 87 clknode_link_set_mux(struct clknode *clk, int idx) 88 { 89 90 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 91 clknode_get_name(clk)); 92 return (EBADF); 93 } 94 95 static int 96 clknode_link_set_gate(struct clknode *clk, bool enable) 97 { 98 99 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 100 clknode_get_name(clk)); 101 return (EBADF); 102 } 103 104 int 105 clknode_link_register(struct clkdom *clkdom, struct clk_link_def *clkdef) 106 { 107 struct clknode *clk; 108 struct clknode_init_def tmp; 109 110 tmp = clkdef->clkdef; 111 tmp.flags |= CLK_NODE_LINKED; 112 clk = clknode_create(clkdom, &clknode_link_class, &tmp); 113 if (clk == NULL) 114 return (1); 115 clknode_register(clkdom, clk); 116 return (0); 117 } 118