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 | */ |
21 | struct sprd_mux_ssel { |
22 | u8 shift; |
23 | u8 width; |
24 | const u8 *table; |
25 | }; |
26 | |
27 | struct 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 | |
73 | static 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 | |
80 | extern const struct clk_ops sprd_mux_ops; |
81 | |
82 | u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common, |
83 | const struct sprd_mux_ssel *mux); |
84 | int 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 | |