xref: /openbmc/linux/drivers/clk/actions/owl-pll.h (revision ddd3e8b9)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 //
3 // OWL pll 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_PLL_H_
12 #define _OWL_PLL_H_
13 
14 #include "owl-common.h"
15 
16 #define OWL_PLL_DEF_DELAY	50
17 
18 /* last entry should have rate = 0 */
19 struct clk_pll_table {
20 	unsigned int		val;
21 	unsigned long		rate;
22 };
23 
24 struct owl_pll_hw {
25 	u32			reg;
26 	u32			bfreq;
27 	u8			bit_idx;
28 	u8			shift;
29 	u8			width;
30 	u8			min_mul;
31 	u8			max_mul;
32 	u8			delay;
33 	const struct clk_pll_table *table;
34 };
35 
36 struct owl_pll {
37 	struct owl_pll_hw	pll_hw;
38 	struct owl_clk_common	common;
39 };
40 
41 #define OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,			\
42 		   _width, _min_mul, _max_mul, _delay, _table)		\
43 	{								\
44 		.reg		= _reg,					\
45 		.bfreq		= _bfreq,				\
46 		.bit_idx	= _bit_idx,				\
47 		.shift		= _shift,				\
48 		.width		= _width,				\
49 		.min_mul	= _min_mul,				\
50 		.max_mul	= _max_mul,				\
51 		.delay		= _delay,				\
52 		.table		= _table,				\
53 	}
54 
55 #define OWL_PLL(_struct, _name, _parent, _reg, _bfreq, _bit_idx,	\
56 		_shift, _width, _min_mul, _max_mul, _table, _flags)	\
57 	struct owl_pll _struct = {					\
58 		.pll_hw	= OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,	\
59 				     _width, _min_mul, _max_mul,	\
60 				     OWL_PLL_DEF_DELAY,	_table),	\
61 		.common = {						\
62 			.regmap = NULL,					\
63 			.hw.init = CLK_HW_INIT(_name,			\
64 					       _parent,			\
65 					       &owl_pll_ops,		\
66 					       _flags),			\
67 		},							\
68 	}
69 
70 #define OWL_PLL_NO_PARENT(_struct, _name, _reg, _bfreq, _bit_idx,	\
71 		_shift, _width, _min_mul, _max_mul, _table, _flags)	\
72 	struct owl_pll _struct = {					\
73 		.pll_hw	= OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,	\
74 				     _width, _min_mul, _max_mul,	\
75 				     OWL_PLL_DEF_DELAY,	_table),	\
76 		.common = {						\
77 			.regmap = NULL,					\
78 			.hw.init = CLK_HW_INIT_NO_PARENT(_name,		\
79 					       &owl_pll_ops,		\
80 					       _flags),			\
81 		},							\
82 	}
83 
84 #define OWL_PLL_NO_PARENT_DELAY(_struct, _name, _reg, _bfreq, _bit_idx,	\
85 		_shift, _width, _min_mul, _max_mul, _delay, _table,	\
86 		_flags)							\
87 	struct owl_pll _struct = {					\
88 		.pll_hw	= OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift,	\
89 				     _width, _min_mul,  _max_mul,	\
90 				     _delay, _table),			\
91 		.common = {						\
92 			.regmap = NULL,					\
93 			.hw.init = CLK_HW_INIT_NO_PARENT(_name,		\
94 					       &owl_pll_ops,		\
95 					       _flags),			\
96 		},							\
97 	}
98 
99 #define mul_mask(m)		((1 << ((m)->width)) - 1)
100 
hw_to_owl_pll(const struct clk_hw * hw)101 static inline struct owl_pll *hw_to_owl_pll(const struct clk_hw *hw)
102 {
103 	struct owl_clk_common *common = hw_to_owl_clk_common(hw);
104 
105 	return container_of(common, struct owl_pll, common);
106 }
107 
108 extern const struct clk_ops owl_pll_ops;
109 
110 #endif /* _OWL_PLL_H_ */
111