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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Spreadtrum divider clock driver | |
4 | // | |
5 | // Copyright (C) 2017 Spreadtrum, Inc. | |
6 | // Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com> | |
7 | ||
8 | #ifndef _SPRD_DIV_H_ | |
9 | #define _SPRD_DIV_H_ | |
10 | ||
11 | #include "common.h" | |
12 | ||
13 | /** | |
14 | * struct sprd_div_internal - Internal divider description | |
15 | * @shift: Bit offset of the divider in its register | |
16 | * @width: Width of the divider field in its register | |
17 | * | |
18 | * That structure represents a single divider, and is meant to be | |
19 | * embedded in other structures representing the various clock | |
20 | * classes. | |
21 | */ | |
22 | struct sprd_div_internal { | |
23 | u8 shift; | |
24 | u8 width; | |
25 | }; | |
26 | ||
27 | #define _SPRD_DIV_CLK(_shift, _width) \ | |
28 | { \ | |
29 | .shift = _shift, \ | |
30 | .width = _width, \ | |
31 | } | |
32 | ||
33 | struct sprd_div { | |
34 | struct sprd_div_internal div; | |
35 | struct sprd_clk_common common; | |
36 | }; | |
37 | ||
38 | #define SPRD_DIV_CLK(_struct, _name, _parent, _reg, \ | |
39 | _shift, _width, _flags) \ | |
40 | struct sprd_div _struct = { \ | |
41 | .div = _SPRD_DIV_CLK(_shift, _width), \ | |
42 | .common = { \ | |
43 | .regmap = NULL, \ | |
44 | .reg = _reg, \ | |
45 | .hw.init = CLK_HW_INIT(_name, \ | |
46 | _parent, \ | |
47 | &sprd_div_ops, \ | |
48 | _flags), \ | |
49 | } \ | |
50 | } | |
51 | ||
52 | static inline struct sprd_div *hw_to_sprd_div(const struct clk_hw *hw) | |
53 | { | |
54 | struct sprd_clk_common *common = hw_to_sprd_clk_common(hw); | |
55 | ||
56 | return container_of(common, struct sprd_div, common); | |
57 | } | |
58 | ||
59 | long sprd_div_helper_round_rate(struct sprd_clk_common *common, | |
60 | const struct sprd_div_internal *div, | |
61 | unsigned long rate, | |
62 | unsigned long *parent_rate); | |
63 | ||
64 | unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common, | |
65 | const struct sprd_div_internal *div, | |
66 | unsigned long parent_rate); | |
67 | ||
68 | int sprd_div_helper_set_rate(const struct sprd_clk_common *common, | |
69 | const struct sprd_div_internal *div, | |
70 | unsigned long rate, | |
71 | unsigned long parent_rate); | |
72 | ||
73 | extern const struct clk_ops sprd_div_ops; | |
74 | ||
75 | #endif /* _SPRD_DIV_H_ */ |