1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2018 MediaTek Inc.
4 * Author: Owen Chen <owen.chen@mediatek.com>
5 */
6
7#ifndef __DRV_CLK_MTK_MUX_H
8#define __DRV_CLK_MTK_MUX_H
9
10#include <linux/notifier.h>
11#include <linux/spinlock.h>
12#include <linux/types.h>
13
14struct clk;
15struct clk_hw_onecell_data;
16struct clk_ops;
17struct device;
18struct device_node;
19
20struct mtk_mux {
21 int id;
22 const char *name;
23 const char * const *parent_names;
24 unsigned int flags;
25
26 u32 mux_ofs;
27 u32 set_ofs;
28 u32 clr_ofs;
29 u32 upd_ofs;
30
31 u8 mux_shift;
32 u8 mux_width;
33 u8 gate_shift;
34 s8 upd_shift;
35
36 const struct clk_ops *ops;
37 signed char num_parents;
38};
39
40#define GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \
41 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
42 _gate, _upd_ofs, _upd, _flags, _ops) { \
43 .id = _id, \
44 .name = _name, \
45 .mux_ofs = _mux_ofs, \
46 .set_ofs = _mux_set_ofs, \
47 .clr_ofs = _mux_clr_ofs, \
48 .upd_ofs = _upd_ofs, \
49 .mux_shift = _shift, \
50 .mux_width = _width, \
51 .gate_shift = _gate, \
52 .upd_shift = _upd, \
53 .parent_names = _parents, \
54 .num_parents = ARRAY_SIZE(_parents), \
55 .flags = _flags, \
56 .ops = &_ops, \
57 }
58
59extern const struct clk_ops mtk_mux_clr_set_upd_ops;
60extern const struct clk_ops mtk_mux_gate_clr_set_upd_ops;
61
62#define MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \
63 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
64 _gate, _upd_ofs, _upd, _flags) \
65 GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \
66 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
67 _gate, _upd_ofs, _upd, _flags, \
68 mtk_mux_gate_clr_set_upd_ops)
69
70#define MUX_GATE_CLR_SET_UPD(_id, _name, _parents, _mux_ofs, \
71 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
72 _gate, _upd_ofs, _upd) \
73 MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, \
74 _mux_ofs, _mux_set_ofs, _mux_clr_ofs, _shift, \
75 _width, _gate, _upd_ofs, _upd, \
76 CLK_SET_RATE_PARENT)
77
78#define MUX_CLR_SET_UPD(_id, _name, _parents, _mux_ofs, \
79 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
80 _upd_ofs, _upd) \
81 GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \
82 _mux_set_ofs, _mux_clr_ofs, _shift, _width, \
83 0, _upd_ofs, _upd, CLK_SET_RATE_PARENT, \
84 mtk_mux_clr_set_upd_ops)
85
86int mtk_clk_register_muxes(struct device *dev,
87 const struct mtk_mux *muxes,
88 int num, struct device_node *node,
89 spinlock_t *lock,
90 struct clk_hw_onecell_data *clk_data);
91
92void mtk_clk_unregister_muxes(const struct mtk_mux *muxes, int num,
93 struct clk_hw_onecell_data *clk_data);
94
95struct mtk_mux_nb {
96 struct notifier_block nb;
97 const struct clk_ops *ops;
98
99 u8 bypass_index; /* Which parent to temporarily use */
100 u8 original_index; /* Set by notifier callback */
101};
102
103#define to_mtk_mux_nb(_nb) container_of(_nb, struct mtk_mux_nb, nb)
104
105int devm_mtk_clk_mux_notifier_register(struct device *dev, struct clk *clk,
106 struct mtk_mux_nb *mux_nb);
107
108#endif /* __DRV_CLK_MTK_MUX_H */
109

source code of linux/drivers/clk/mediatek/clk-mux.h