1 /* SPDX-License-Identifier: GPL-2.0+ */
2 //
3 // OWL mux 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_MUX_H_
12 #define _OWL_MUX_H_
13
14 #include "owl-common.h"
15
16 struct owl_mux_hw {
17 u32 reg;
18 u8 shift;
19 u8 width;
20 };
21
22 struct owl_mux {
23 struct owl_mux_hw mux_hw;
24 struct owl_clk_common common;
25 };
26
27 #define OWL_MUX_HW(_reg, _shift, _width) \
28 { \
29 .reg = _reg, \
30 .shift = _shift, \
31 .width = _width, \
32 }
33
34 #define OWL_MUX(_struct, _name, _parents, _reg, \
35 _shift, _width, _flags) \
36 struct owl_mux _struct = { \
37 .mux_hw = OWL_MUX_HW(_reg, _shift, _width), \
38 .common = { \
39 .regmap = NULL, \
40 .hw.init = CLK_HW_INIT_PARENTS(_name, \
41 _parents, \
42 &owl_mux_ops, \
43 _flags), \
44 }, \
45 }
46
hw_to_owl_mux(const struct clk_hw * hw)47 static inline struct owl_mux *hw_to_owl_mux(const struct clk_hw *hw)
48 {
49 struct owl_clk_common *common = hw_to_owl_clk_common(hw);
50
51 return container_of(common, struct owl_mux, common);
52 }
53
54 u8 owl_mux_helper_get_parent(const struct owl_clk_common *common,
55 const struct owl_mux_hw *mux_hw);
56 int owl_mux_helper_set_parent(const struct owl_clk_common *common,
57 struct owl_mux_hw *mux_hw, u8 index);
58
59 extern const struct clk_ops owl_mux_ops;
60
61 #endif /* _OWL_MUX_H_ */
62