xref: /openbmc/linux/drivers/clk/actions/owl-mux.h (revision ddd3e8b9)
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