1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2021 Semihalf.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/rman.h>
37 #include <machine/bus.h>
38
39 #include <dev/fdt/simplebus.h>
40
41 #include <dev/extres/clk/clk.h>
42 #include <dev/extres/clk/clk_div.h>
43 #include <dev/extres/clk/clk_fixed.h>
44 #include <dev/extres/clk/clk_gate.h>
45 #include <dev/extres/clk/clk_mux.h>
46
47 #include <dev/ofw/ofw_bus.h>
48 #include <dev/ofw/ofw_bus_subr.h>
49
50 #include "clkdev_if.h"
51 #include "periph.h"
52
53 #define PARENT_CNT 2
54
55 /*
56 * Register clock with fixed frequency divider clock. Chain consists of:
57 * fixed clock (output from xtal/2) -> mux (choose fixed or xtal frequency)
58 */
59
60 int
61 a37x0_periph_fixed_register_fixed(struct clkdom *clkdom,
62 struct a37x0_periph_clknode_def *device_def)
63 {
64 const char *parent_names[PARENT_CNT];
65 struct clk_fixed_def fixed_def;
66 struct clk_gate_def *gate;
67 struct clk_mux_def *mux;
68 int error, dev_id;
69
70 dev_id = device_def->common_def.device_id;
71 mux = &device_def->clk_def.fixed.mux;
72 gate = &device_def->clk_def.fixed.gate;
73 fixed_def = device_def->clk_def.fixed.fixed;
74
75 fixed_def.clkdef.parent_names = &device_def->common_def.xtal;
76 fixed_def.clkdef.parent_cnt = 1;
77 fixed_def.clkdef.id = A37x0_INTERNAL_CLK_ID(dev_id, FIXED1_POS);
78 fixed_def.clkdef.flags = 0;
79 fixed_def.mult = 1;
80 fixed_def.div = 2;
81 fixed_def.freq = 0;
82
83 parent_names[0] = device_def->common_def.xtal;
84 parent_names[1] = fixed_def.clkdef.name;
85
86 error = clknode_fixed_register(clkdom, &fixed_def);
87 if (error)
88 goto fail;
89
90 a37x0_periph_set_props(&mux->clkdef, parent_names ,PARENT_CNT);
91 error = a37x0_periph_create_mux(clkdom, mux,
92 A37x0_INTERNAL_CLK_ID(dev_id, MUX_POS));
93 if (error)
94 goto fail;
95
96 a37x0_periph_set_props(&gate->clkdef, &mux->clkdef.name, 1);
97 error = a37x0_periph_create_gate(clkdom, gate,
98 dev_id);
99 if (error)
100 goto fail;
101
102 fail:
103
104 return (error);
105 }
Cache object: fbeae8d3758fc23fb301b20fcbccd564
|