xref: /linux/drivers/clk/actions/owl-factor.h (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 //
3 // OWL factor 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_FACTOR_H_
12 #define _OWL_FACTOR_H_
13 
14 #include "owl-common.h"
15 
16 struct clk_factor_table {
17 	unsigned int		val;
18 	unsigned int		mul;
19 	unsigned int		div;
20 };
21 
22 struct owl_factor_hw {
23 	u32			reg;
24 	u8			shift;
25 	u8			width;
26 	u8			fct_flags;
27 	struct clk_factor_table	*table;
28 };
29 
30 struct owl_factor {
31 	struct owl_factor_hw	factor_hw;
32 	struct owl_clk_common	common;
33 };
34 
35 #define OWL_FACTOR_HW(_reg, _shift, _width, _fct_flags, _table)		\
36 	{								\
37 		.reg		= _reg,					\
38 		.shift		= _shift,				\
39 		.width		= _width,				\
40 		.fct_flags	= _fct_flags,				\
41 		.table		= _table,				\
42 	}
43 
44 #define OWL_FACTOR(_struct, _name, _parent, _reg,			\
45 		   _shift, _width, _table, _fct_flags, _flags)		\
46 	struct owl_factor _struct = {					\
47 		.factor_hw = OWL_FACTOR_HW(_reg, _shift,		\
48 					   _width, _fct_flags, _table),	\
49 		.common = {						\
50 			.regmap		= NULL,				\
51 			.hw.init	= CLK_HW_INIT(_name,		\
52 						      _parent,		\
53 						      &owl_factor_ops,	\
54 						      _flags),		\
55 		},							\
56 	}
57 
58 #define div_mask(d) ((1 << ((d)->width)) - 1)
59 
60 static inline struct owl_factor *hw_to_owl_factor(const struct clk_hw *hw)
61 {
62 	struct owl_clk_common *common = hw_to_owl_clk_common(hw);
63 
64 	return container_of(common, struct owl_factor, common);
65 }
66 
67 long owl_factor_helper_round_rate(struct owl_clk_common *common,
68 				const struct owl_factor_hw *factor_hw,
69 				unsigned long rate,
70 				unsigned long *parent_rate);
71 
72 unsigned long owl_factor_helper_recalc_rate(struct owl_clk_common *common,
73 					 const struct owl_factor_hw *factor_hw,
74 					 unsigned long parent_rate);
75 
76 int owl_factor_helper_set_rate(const struct owl_clk_common *common,
77 				const struct owl_factor_hw *factor_hw,
78 				unsigned long rate,
79 				unsigned long parent_rate);
80 
81 extern const struct clk_ops owl_factor_ops;
82 
83 #endif /* _OWL_FACTOR_H_ */
84