1 #ifndef _CCU_MUX_H_
2 #define _CCU_MUX_H_
3
4 #include <linux/clk-provider.h>
5
6 #include "ccu_common.h"
7
8 struct ccu_mux_fixed_prediv {
9 u8 index;
10 u16 div;
11 };
12
13 struct ccu_mux_internal {
14 u8 shift;
15 u8 width;
16 const u8 *table;
17
18 const struct ccu_mux_fixed_prediv *fixed_predivs;
19 u8 n_predivs;
20
21 struct {
22 u8 index;
23 u8 shift;
24 u8 width;
25 } variable_prediv;
26 };
27
28 #define _SUNXI_CCU_MUX_TABLE(_shift, _width, _table) \
29 { \
30 .shift = _shift, \
31 .width = _width, \
32 .table = _table, \
33 }
34
35 #define _SUNXI_CCU_MUX(_shift, _width) \
36 _SUNXI_CCU_MUX_TABLE(_shift, _width, NULL)
37
38 struct ccu_mux {
39 u16 reg;
40 u32 enable;
41
42 struct ccu_mux_internal mux;
43 struct ccu_common common;
44 };
45
46 #define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \
47 _reg, _shift, _width, _gate, \
48 _flags) \
49 struct ccu_mux _struct = { \
50 .enable = _gate, \
51 .mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \
52 .common = { \
53 .reg = _reg, \
54 .hw.init = CLK_HW_INIT_PARENTS(_name, \
55 _parents, \
56 &ccu_mux_ops, \
57 _flags), \
58 } \
59 }
60
61 #define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \
62 _shift, _width, _gate, _flags) \
63 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
64 _reg, _shift, _width, _gate, \
65 _flags)
66
67 #define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \
68 _flags) \
69 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
70 _reg, _shift, _width, 0, _flags)
71
hw_to_ccu_mux(struct clk_hw * hw)72 static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw)
73 {
74 struct ccu_common *common = hw_to_ccu_common(hw);
75
76 return container_of(common, struct ccu_mux, common);
77 }
78
79 extern const struct clk_ops ccu_mux_ops;
80
81 void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common,
82 struct ccu_mux_internal *cm,
83 int parent_index,
84 unsigned long *parent_rate);
85 int ccu_mux_helper_determine_rate(struct ccu_common *common,
86 struct ccu_mux_internal *cm,
87 struct clk_rate_request *req,
88 unsigned long (*round)(struct ccu_mux_internal *,
89 unsigned long,
90 unsigned long,
91 void *),
92 void *data);
93 u8 ccu_mux_helper_get_parent(struct ccu_common *common,
94 struct ccu_mux_internal *cm);
95 int ccu_mux_helper_set_parent(struct ccu_common *common,
96 struct ccu_mux_internal *cm,
97 u8 index);
98
99 struct ccu_mux_nb {
100 struct notifier_block clk_nb;
101 struct ccu_common *common;
102 struct ccu_mux_internal *cm;
103
104 u32 delay_us; /* How many us to wait after reparenting */
105 u8 bypass_index; /* Which parent to temporarily use */
106 u8 original_index; /* This is set by the notifier callback */
107 };
108
109 #define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb)
110
111 int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb);
112
113 #endif /* _CCU_MUX_H_ */
114