1 /* SPDX-License-Identifier: GPL-2.0+ */
2 //
3 // OWL gate 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_GATE_H_
12 #define _OWL_GATE_H_
13 
14 #include "owl-common.h"
15 
16 struct owl_gate_hw {
17 	u32			reg;
18 	u8			bit_idx;
19 	u8			gate_flags;
20 };
21 
22 struct owl_gate {
23 	struct owl_gate_hw	gate_hw;
24 	struct owl_clk_common	common;
25 };
26 
27 #define OWL_GATE_HW(_reg, _bit_idx, _gate_flags)	\
28 	{						\
29 		.reg		= _reg,			\
30 		.bit_idx	= _bit_idx,		\
31 		.gate_flags	= _gate_flags,		\
32 	}
33 
34 #define OWL_GATE(_struct, _name, _parent, _reg,				\
35 		_bit_idx, _gate_flags, _flags)				\
36 	struct owl_gate _struct = {					\
37 		.gate_hw = OWL_GATE_HW(_reg, _bit_idx, _gate_flags),	\
38 		.common = {						\
39 			.regmap		= NULL,				\
40 			.hw.init	= CLK_HW_INIT(_name,		\
41 						      _parent,		\
42 						      &owl_gate_ops,	\
43 						      _flags),		\
44 		}							\
45 	}								\
46 
47 #define OWL_GATE_NO_PARENT(_struct, _name, _reg,			\
48 		_bit_idx, _gate_flags, _flags)				\
49 	struct owl_gate _struct = {					\
50 		.gate_hw = OWL_GATE_HW(_reg, _bit_idx, _gate_flags),	\
51 		.common = {						\
52 			.regmap		= NULL,				\
53 			.hw.init	= CLK_HW_INIT_NO_PARENT(_name,	\
54 						      &owl_gate_ops,	\
55 						      _flags),		\
56 		},							\
57 	}								\
58 
hw_to_owl_gate(const struct clk_hw * hw)59 static inline struct owl_gate *hw_to_owl_gate(const struct clk_hw *hw)
60 {
61 	struct owl_clk_common *common = hw_to_owl_clk_common(hw);
62 
63 	return container_of(common, struct owl_gate, common);
64 }
65 
66 void owl_gate_set(const struct owl_clk_common *common,
67 		 const struct owl_gate_hw *gate_hw, bool enable);
68 int owl_gate_clk_is_enabled(const struct owl_clk_common *common,
69 		   const struct owl_gate_hw *gate_hw);
70 
71 extern const struct clk_ops owl_gate_ops;
72 
73 #endif /* _OWL_GATE_H_ */
74