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
16struct clk_factor_table {
17	unsigned int		val;
18	unsigned int		mul;
19	unsigned int		div;
20};
21
22struct owl_factor_hw {
23	u32			reg;
24	u8			shift;
25	u8			width;
26	u8			fct_flags;
27	struct clk_factor_table	*table;
28};
29
30struct 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
60static 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
67long 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
72unsigned 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
76int 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
81extern const struct clk_ops owl_factor_ops;
82
83#endif /* _OWL_FACTOR_H_ */
84