2 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
27 #include <sys/param.h>
28 #include <sys/systm.h>
31 #include <sys/mutex.h>
33 #include <machine/bus.h>
35 #include <dev/extres/clk/clk.h>
36 #include <dev/extres/clk/clk_div.h>
37 #include <dev/extres/clk/clk_fixed.h>
38 #include <dev/extres/clk/clk_mux.h>
40 #include "qcom_clk_fdiv.h"
42 #include "clkdev_if.h"
45 * This is a fixed divisor node. It represents some divisor
46 * that is setup by the boot environment and we don't have
47 * any need for the driver to go and fiddle with.
49 * It likely should just live in the extres/clk code.
52 struct qcom_clk_fdiv_sc {
53 struct clknode *clknode;
58 qcom_clk_fdiv_recalc(struct clknode *clk, uint64_t *freq)
60 struct qcom_clk_fdiv_sc *sc;
62 sc = clknode_get_softc(clk);
64 if (freq == NULL || *freq == 0) {
65 printf("%s: called; NULL or 0 frequency\n", __func__);
69 *freq = *freq / sc->divisor;
74 qcom_clk_fdiv_init(struct clknode *clk, device_t dev)
77 * There's only a single parent here for an fixed divisor,
78 * so just set it to 0; the caller doesn't need to supply it.
80 clknode_init_parent_idx(clk, 0);
85 static clknode_method_t qcom_clk_fdiv_methods[] = {
86 /* Device interface */
87 CLKNODEMETHOD(clknode_init, qcom_clk_fdiv_init),
88 CLKNODEMETHOD(clknode_recalc_freq, qcom_clk_fdiv_recalc),
92 DEFINE_CLASS_1(qcom_clk_fepll, qcom_clk_fdiv_class, qcom_clk_fdiv_methods,
93 sizeof(struct qcom_clk_fdiv_sc), clknode_class);
96 qcom_clk_fdiv_register(struct clkdom *clkdom, struct qcom_clk_fdiv_def *clkdef)
99 struct qcom_clk_fdiv_sc *sc;
101 clk = clknode_create(clkdom, &qcom_clk_fdiv_class, &clkdef->clkdef);
105 sc = clknode_get_softc(clk);
108 sc->divisor = clkdef->divisor;
110 clknode_register(clkdom, clk);