1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
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 * $FreeBSD$
28 */
29
30 #ifndef __QCOM_CLK_RCG2_H__
31 #define __QCOM_CLK_RCG2_H__
32
33 #include "qcom_clk_freqtbl.h"
34
35 /* Flags */
36 /* Set the rate on the parent clock, not just ours */
37 #define QCOM_CLK_RCG2_FLAGS_SET_RATE_PARENT 0x1
38 /* Must not stop this clock/gate! */
39 #define QCOM_CLK_RCG2_FLAGS_CRITICAL 0x2
40
41 /* prediv to hw mapping */
42 #define QCOM_CLK_FREQTBL_PREDIV_RCG2(prediv) (2*(prediv)-1)
43
44 struct qcom_clk_rcg2_def {
45 struct clknode_init_def clkdef;
46 uint32_t cmd_rcgr; /* rcg2 register start */
47 uint32_t hid_width; /* pre-divisor width */
48 uint32_t mnd_width; /* mn:d divisor width */
49 int32_t safe_src_idx; /* safe parent when disabling a shared
50 * rcg2 */
51 uint32_t cfg_offset; /* cfg offset after cmd_rcgr */
52 int32_t safe_pre_parent_idx; /* safe parent before switching
53 * parent mux */
54 uint32_t flags;
55 const struct qcom_clk_freq_tbl *freq_tbl;
56 };
57
58 extern int qcom_clk_rcg2_register(struct clkdom *clkdom,
59 struct qcom_clk_rcg2_def *clkdef);
60
61 #endif /* __QCOM_CLK_RCG2_H__ */
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