1/* SPDX-License-Identifier: GPL-2.0 */
2//
3// Spreadtrum multiplexer clock driver
4//
5// Copyright (C) 2017 Spreadtrum, Inc.
6// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
7
8#ifndef _SPRD_MUX_H_
9#define _SPRD_MUX_H_
10
11#include "common.h"
12
13/**
14 * struct sprd_mux_ssel - Mux clock's source select bits in its register
15 * @shift: Bit offset of the divider in its register
16 * @width: Width of the divider field in its register
17 * @table: For some mux clocks, not all sources are used on some special
18 * chips, this matches the value of mux clock's register and the
19 * sources which are used for this mux clock
20 */
21struct sprd_mux_ssel {
22 u8 shift;
23 u8 width;
24 const u8 *table;
25};
26
27struct sprd_mux {
28 struct sprd_mux_ssel mux;
29 struct sprd_clk_common common;
30};
31
32#define _SPRD_MUX_CLK(_shift, _width, _table) \
33 { \
34 .shift = _shift, \
35 .width = _width, \
36 .table = _table, \
37 }
38
39#define SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table, \
40 _reg, _shift, _width, _flags, _fn) \
41 struct sprd_mux _struct = { \
42 .mux = _SPRD_MUX_CLK(_shift, _width, _table), \
43 .common = { \
44 .regmap = NULL, \
45 .reg = _reg, \
46 .hw.init = _fn(_name, _parents, \
47 &sprd_mux_ops, _flags), \
48 } \
49 }
50
51#define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table, \
52 _reg, _shift, _width, _flags) \
53 SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table, \
54 _reg, _shift, _width, _flags, \
55 CLK_HW_INIT_PARENTS)
56
57#define SPRD_MUX_CLK(_struct, _name, _parents, _reg, \
58 _shift, _width, _flags) \
59 SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL, \
60 _reg, _shift, _width, _flags)
61
62#define SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, _table, \
63 _reg, _shift, _width, _flags) \
64 SPRD_MUX_CLK_HW_INIT_FN(_struct, _name, _parents, _table, \
65 _reg, _shift, _width, _flags, \
66 CLK_HW_INIT_PARENTS_DATA)
67
68#define SPRD_MUX_CLK_DATA(_struct, _name, _parents, _reg, \
69 _shift, _width, _flags) \
70 SPRD_MUX_CLK_DATA_TABLE(_struct, _name, _parents, NULL, \
71 _reg, _shift, _width, _flags)
72
73static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
74{
75 struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
76
77 return container_of(common, struct sprd_mux, common);
78}
79
80extern const struct clk_ops sprd_mux_ops;
81
82u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
83 const struct sprd_mux_ssel *mux);
84int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
85 const struct sprd_mux_ssel *mux,
86 u8 index);
87
88#endif /* _SPRD_MUX_H_ */
89

source code of linux/drivers/clk/sprd/mux.h