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/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/conf.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/kobj.h> 35#include <sys/malloc.h> 36#include <sys/mutex.h> 37#include <sys/module.h> 38#include <sys/rman.h> 39#include <sys/systm.h> 40 41#include <machine/bus.h> 42 43#include <dev/ofw/ofw_bus.h> 44#include <dev/ofw/ofw_bus_subr.h> 45#include <dev/extres/clk/clk_link.h> 46 47static int clknode_link_init(struct clknode *clk, device_t dev); 48static int clknode_link_recalc(struct clknode *clk, uint64_t *freq); 49static int clknode_link_set_freq(struct clknode *clk, uint64_t fin, 50 uint64_t *fout, int flags, int *stop); 51static int clknode_link_set_mux(struct clknode *clk, int idx); 52static int clknode_link_set_gate(struct clknode *clk, bool enable); 53 54static clknode_method_t clknode_link_methods[] = { 55 /* Device interface */ 56 CLKNODEMETHOD(clknode_init, clknode_link_init), 57 CLKNODEMETHOD(clknode_recalc_freq, clknode_link_recalc), 58 CLKNODEMETHOD(clknode_set_freq, clknode_link_set_freq), 59 CLKNODEMETHOD(clknode_set_gate, clknode_link_set_gate), 60 CLKNODEMETHOD(clknode_set_mux, clknode_link_set_mux), 61 CLKNODEMETHOD_END 62}; 63DEFINE_CLASS_1(clknode_link, clknode_link_class, clknode_link_methods, 64 0, clknode_class); 65 66static int 67clknode_link_init(struct clknode *clk, device_t dev) 68{ 69 return(0); 70} 71 72static int 73clknode_link_recalc(struct clknode *clk, uint64_t *freq) 74{ 75 76 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 77 clknode_get_name(clk)); 78 return (EBADF); 79} 80 81static int 82clknode_link_set_freq(struct clknode *clk, uint64_t fin, uint64_t *fout, 83 int flags, int *stop) 84{ 85 86 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 87 clknode_get_name(clk)); 88 return (EBADF); 89} 90 91static int 92clknode_link_set_mux(struct clknode *clk, int idx) 93{ 94 95 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 96 clknode_get_name(clk)); 97 return (EBADF); 98} 99 100static int 101clknode_link_set_gate(struct clknode *clk, bool enable) 102{ 103 104 printf("%s: Attempt to use unresolved linked clock: %s\n", __func__, 105 clknode_get_name(clk)); 106 return (EBADF); 107} 108 109int 110clknode_link_register(struct clkdom *clkdom, struct clk_link_def *clkdef) 111{ 112 struct clknode *clk; 113 struct clknode_init_def tmp; 114 115 tmp = clkdef->clkdef; 116 tmp.flags |= CLK_NODE_LINKED; 117 clk = clknode_create(clkdom, &clknode_link_class, &tmp); 118 if (clk == NULL) 119 return (1); 120 clknode_register(clkdom, clk); 121 return (0); 122} 123