2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, 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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
39 #include <machine/bus.h>
41 #include <dev/extres/clk/clk.h>
43 #include <arm64/rockchip/clk/rk_cru.h>
44 #include <arm64/rockchip/clk/rk_clk_mux.h>
46 #include "clkdev_if.h"
48 #define WR4(_clk, off, val) \
49 CLKDEV_WRITE_4(clknode_get_device(_clk), off, val)
50 #define RD4(_clk, off, val) \
51 CLKDEV_READ_4(clknode_get_device(_clk), off, val)
52 #define MD4(_clk, off, clr, set ) \
53 CLKDEV_MODIFY_4(clknode_get_device(_clk), off, clr, set)
54 #define DEVICE_LOCK(_clk) \
55 CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
56 #define DEVICE_UNLOCK(_clk) \
57 CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
59 static int rk_clk_mux_init(struct clknode *clk, device_t dev);
60 static int rk_clk_mux_set_mux(struct clknode *clk, int idx);
62 struct rk_clk_mux_sc {
69 static clknode_method_t rk_clk_mux_methods[] = {
70 /* Device interface */
71 CLKNODEMETHOD(clknode_init, rk_clk_mux_init),
72 CLKNODEMETHOD(clknode_set_mux, rk_clk_mux_set_mux),
75 DEFINE_CLASS_1(rk_clk_mux, rk_clk_mux_class, rk_clk_mux_methods,
76 sizeof(struct rk_clk_mux_sc), clknode_class);
80 rk_clk_mux_init(struct clknode *clk, device_t dev)
83 struct rk_clk_mux_sc *sc;
86 sc = clknode_get_softc(clk);
89 rv = RD4(clk, sc->offset, ®);
94 reg = (reg >> sc->shift) & sc->mask;
95 clknode_init_parent_idx(clk, reg);
100 rk_clk_mux_set_mux(struct clknode *clk, int idx)
103 struct rk_clk_mux_sc *sc;
106 sc = clknode_get_softc(clk);
109 rv = MD4(clk, sc->offset, sc->mask << sc->shift,
110 ((idx & sc->mask) << sc->shift) | RK_CLK_MUX_MASK);
115 RD4(clk, sc->offset, ®);
122 rk_clk_mux_register(struct clkdom *clkdom, struct rk_clk_mux_def *clkdef)
125 struct rk_clk_mux_sc *sc;
127 clk = clknode_create(clkdom, &rk_clk_mux_class, &clkdef->clkdef);
131 sc = clknode_get_softc(clk);
132 sc->offset = clkdef->offset;
133 sc->shift = clkdef->shift;
134 sc->mask = (1 << clkdef->width) - 1;
135 sc->mux_flags = clkdef->mux_flags;
137 clknode_register(clkdom, clk);