summaryrefslogtreecommitdiff
path: root/drivers/clk/starfive/clk-starfive-jh71x0.h
blob: 34bb11c72eb73b62438d4a135449144d4bda9fe9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __CLK_STARFIVE_JH71X0_H
#define __CLK_STARFIVE_JH71X0_H

#include <linux/bits.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/spinlock.h>

/* register fields */
#define JH71X0_CLK_ENABLE	BIT(31)
#define JH71X0_CLK_INVERT	BIT(30)
#define JH71X0_CLK_MUX_MASK	GENMASK(27, 24)
#define JH71X0_CLK_MUX_SHIFT	24
#define JH71X0_CLK_DIV_MASK	GENMASK(23, 0)
#define JH71X0_CLK_FRAC_MASK	GENMASK(15, 8)
#define JH71X0_CLK_FRAC_SHIFT	8
#define JH71X0_CLK_INT_MASK	GENMASK(7, 0)

/* fractional divider min/max */
#define JH71X0_CLK_FRAC_MIN	100UL
#define JH71X0_CLK_FRAC_MAX	25599UL

/* clock data */
struct jh71x0_clk_data {
	const char *name;
	unsigned long flags;
	u32 max;
	u8 parents[4];
};

#define JH71X0_GATE(_idx, _name, _flags, _parent)				\
[_idx] = {									\
	.name = _name,								\
	.flags = CLK_SET_RATE_PARENT | (_flags),				\
	.max = JH71X0_CLK_ENABLE,						\
	.parents = { [0] = _parent },						\
}

#define JH71X0__DIV(_idx, _name, _max, _parent)					\
[_idx] = {									\
	.name = _name,								\
	.flags = 0,								\
	.max = _max,								\
	.parents = { [0] = _parent },						\
}

#define JH71X0_GDIV(_idx, _name, _flags, _max, _parent)				\
[_idx] = {									\
	.name = _name,								\
	.flags = _flags,							\
	.max = JH71X0_CLK_ENABLE | (_max),					\
	.parents = { [0] = _parent },						\
}

#define JH71X0_FDIV(_idx, _name, _parent)					\
[_idx] = {									\
	.name = _name,								\
	.flags = 0,								\
	.max = JH71X0_CLK_FRAC_MAX,						\
	.parents = { [0] = _parent },						\
}

#define JH71X0__MUX(_idx, _name, _nparents, ...)				\
[_idx] = {									\
	.name = _name,								\
	.flags = 0,								\
	.max = ((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT,			\
	.parents = { __VA_ARGS__ },						\
}

#define JH71X0_GMUX(_idx, _name, _flags, _nparents, ...)			\
[_idx] = {									\
	.name = _name,								\
	.flags = _flags,							\
	.max = JH71X0_CLK_ENABLE |						\
		(((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT),			\
	.parents = { __VA_ARGS__ },						\
}

#define JH71X0_MDIV(_idx, _name, _max, _nparents, ...)				\
[_idx] = {									\
	.name = _name,								\
	.flags = 0,								\
	.max = (((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT) | (_max),		\
	.parents = { __VA_ARGS__ },						\
}

#define JH71X0__GMD(_idx, _name, _flags, _max, _nparents, ...)			\
[_idx] = {									\
	.name = _name,								\
	.flags = _flags,							\
	.max = JH71X0_CLK_ENABLE |						\
		(((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT) | (_max),		\
	.parents = { __VA_ARGS__ },						\
}

#define JH71X0__INV(_idx, _name, _parent)					\
[_idx] = {									\
	.name = _name,								\
	.flags = CLK_SET_RATE_PARENT,						\
	.max = JH71X0_CLK_INVERT,						\
	.parents = { [0] = _parent },						\
}

struct jh71x0_clk {
	struct clk_hw hw;
	unsigned int idx;
	unsigned int max_div;
};

struct jh71x0_clk_priv {
	/* protect clk enable and set rate/parent from happening at the same time */
	spinlock_t rmw_lock;
	struct device *dev;
	void __iomem *base;
	struct clk_hw *pll[3];
	struct jh71x0_clk reg[];
};

const struct clk_ops *starfive_jh71x0_clk_ops(u32 max);

#endif