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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Maxime Ripard2a65ed42016-06-29 21:05:26 +02002#ifndef _CCU_MUX_H_
3#define _CCU_MUX_H_
4
5#include <linux/clk-provider.h>
6
7#include "ccu_common.h"
8
Chen-Yu Tsaiff5294d2016-08-25 14:21:57 +08009struct ccu_mux_fixed_prediv {
10 u8 index;
11 u16 div;
12};
13
Chen-Yu Tsai13e0dde2017-05-19 15:06:08 +080014struct ccu_mux_var_prediv {
15 u8 index;
16 u8 shift;
17 u8 width;
18};
19
Maxime Ripard2a65ed42016-06-29 21:05:26 +020020struct ccu_mux_internal {
Chen-Yu Tsai2b9c8752016-08-25 14:21:56 +080021 u8 shift;
22 u8 width;
23 const u8 *table;
Maxime Ripard2a65ed42016-06-29 21:05:26 +020024
Chen-Yu Tsaiff5294d2016-08-25 14:21:57 +080025 const struct ccu_mux_fixed_prediv *fixed_predivs;
26 u8 n_predivs;
Maxime Ripard2a65ed42016-06-29 21:05:26 +020027
Chen-Yu Tsai13e0dde2017-05-19 15:06:08 +080028 const struct ccu_mux_var_prediv *var_predivs;
29 u8 n_var_predivs;
Maxime Ripard2a65ed42016-06-29 21:05:26 +020030};
31
Chen-Yu Tsai2b9c8752016-08-25 14:21:56 +080032#define _SUNXI_CCU_MUX_TABLE(_shift, _width, _table) \
33 { \
34 .shift = _shift, \
35 .width = _width, \
36 .table = _table, \
Maxime Ripard2a65ed42016-06-29 21:05:26 +020037 }
38
Chen-Yu Tsai2b9c8752016-08-25 14:21:56 +080039#define _SUNXI_CCU_MUX(_shift, _width) \
40 _SUNXI_CCU_MUX_TABLE(_shift, _width, NULL)
41
Maxime Ripard2a65ed42016-06-29 21:05:26 +020042struct ccu_mux {
43 u16 reg;
44 u32 enable;
45
46 struct ccu_mux_internal mux;
47 struct ccu_common common;
48};
49
Maxime Ripard13e91e42016-08-30 10:38:51 +020050#define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \
51 _reg, _shift, _width, _gate, \
52 _flags) \
Maxime Ripard2a65ed42016-06-29 21:05:26 +020053 struct ccu_mux _struct = { \
Maxime Ripard13e91e42016-08-30 10:38:51 +020054 .enable = _gate, \
55 .mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \
Maxime Ripard2a65ed42016-06-29 21:05:26 +020056 .common = { \
57 .reg = _reg, \
58 .hw.init = CLK_HW_INIT_PARENTS(_name, \
59 _parents, \
60 &ccu_mux_ops, \
61 _flags), \
62 } \
63 }
64
65#define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \
66 _shift, _width, _gate, _flags) \
Maxime Ripard13e91e42016-08-30 10:38:51 +020067 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
68 _reg, _shift, _width, _gate, \
69 _flags)
70
71#define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \
72 _flags) \
73 SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
74 _reg, _shift, _width, 0, _flags)
Maxime Ripard2a65ed42016-06-29 21:05:26 +020075
76static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw)
77{
78 struct ccu_common *common = hw_to_ccu_common(hw);
79
80 return container_of(common, struct ccu_mux, common);
81}
82
83extern const struct clk_ops ccu_mux_ops;
84
Maxime Ripardd754b152017-05-17 09:40:35 +020085unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common,
86 struct ccu_mux_internal *cm,
87 int parent_index,
88 unsigned long parent_rate);
Maxime Ripard2a65ed42016-06-29 21:05:26 +020089int ccu_mux_helper_determine_rate(struct ccu_common *common,
90 struct ccu_mux_internal *cm,
91 struct clk_rate_request *req,
92 unsigned long (*round)(struct ccu_mux_internal *,
Maxime Ripard10a8d9b2017-05-17 09:40:31 +020093 struct clk_hw *,
94 unsigned long *,
Maxime Ripard2a65ed42016-06-29 21:05:26 +020095 unsigned long,
96 void *),
97 void *data);
98u8 ccu_mux_helper_get_parent(struct ccu_common *common,
99 struct ccu_mux_internal *cm);
100int ccu_mux_helper_set_parent(struct ccu_common *common,
101 struct ccu_mux_internal *cm,
102 u8 index);
103
Chen-Yu Tsai8adfb082016-08-25 14:21:58 +0800104struct ccu_mux_nb {
105 struct notifier_block clk_nb;
106 struct ccu_common *common;
107 struct ccu_mux_internal *cm;
108
109 u32 delay_us; /* How many us to wait after reparenting */
110 u8 bypass_index; /* Which parent to temporarily use */
111 u8 original_index; /* This is set by the notifier callback */
112};
113
114#define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb)
115
116int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb);
117
Maxime Ripard2a65ed42016-06-29 21:05:26 +0200118#endif /* _CCU_MUX_H_ */