1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2 | // |
3 | // OWL divider clock driver |
4 | // |
5 | // Copyright (c) 2014 Actions Semi Inc. |
6 | // Author: David Liu <liuwei@actions-semi.com> |
7 | // |
8 | // Copyright (c) 2018 Linaro Ltd. |
9 | // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
10 | |
11 | #ifndef _OWL_DIVIDER_H_ |
12 | #define _OWL_DIVIDER_H_ |
13 | |
14 | #include "owl-common.h" |
15 | |
16 | struct owl_divider_hw { |
17 | u32 reg; |
18 | u8 shift; |
19 | u8 width; |
20 | u8 div_flags; |
21 | struct clk_div_table *table; |
22 | }; |
23 | |
24 | struct owl_divider { |
25 | struct owl_divider_hw div_hw; |
26 | struct owl_clk_common common; |
27 | }; |
28 | |
29 | #define OWL_DIVIDER_HW(_reg, _shift, _width, _div_flags, _table) \ |
30 | { \ |
31 | .reg = _reg, \ |
32 | .shift = _shift, \ |
33 | .width = _width, \ |
34 | .div_flags = _div_flags, \ |
35 | .table = _table, \ |
36 | } |
37 | |
38 | #define OWL_DIVIDER(_struct, _name, _parent, _reg, \ |
39 | _shift, _width, _table, _div_flags, _flags) \ |
40 | struct owl_divider _struct = { \ |
41 | .div_hw = OWL_DIVIDER_HW(_reg, _shift, _width, \ |
42 | _div_flags, _table), \ |
43 | .common = { \ |
44 | .regmap = NULL, \ |
45 | .hw.init = CLK_HW_INIT(_name, \ |
46 | _parent, \ |
47 | &owl_divider_ops, \ |
48 | _flags), \ |
49 | }, \ |
50 | } |
51 | |
52 | static inline struct owl_divider *hw_to_owl_divider(const struct clk_hw *hw) |
53 | { |
54 | struct owl_clk_common *common = hw_to_owl_clk_common(hw); |
55 | |
56 | return container_of(common, struct owl_divider, common); |
57 | } |
58 | |
59 | long owl_divider_helper_round_rate(struct owl_clk_common *common, |
60 | const struct owl_divider_hw *div_hw, |
61 | unsigned long rate, |
62 | unsigned long *parent_rate); |
63 | |
64 | unsigned long owl_divider_helper_recalc_rate(struct owl_clk_common *common, |
65 | const struct owl_divider_hw *div_hw, |
66 | unsigned long parent_rate); |
67 | |
68 | int owl_divider_helper_set_rate(const struct owl_clk_common *common, |
69 | const struct owl_divider_hw *div_hw, |
70 | unsigned long rate, |
71 | unsigned long parent_rate); |
72 | |
73 | extern const struct clk_ops owl_divider_ops; |
74 | |
75 | #endif /* _OWL_DIVIDER_H_ */ |
76 | |