summaryrefslogtreecommitdiffstats
path: root/drivers/clk/qcom/clk-rcg.h
blob: 56028bb31d8713f4a627a78027191df58b504bfb (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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __QCOM_CLK_RCG_H__
#define __QCOM_CLK_RCG_H__

#include <linux/clk-provider.h>
#include "clk-regmap.h"

struct freq_tbl {
	unsigned long freq;
	u8 src;
	u8 pre_div;
	u16 m;
	u16 n;
};

/**
 * struct parent_map - map table for PLL source select configuration values
 * @src: source PLL
 * @cfg: configuration value
 */
struct parent_map {
	u8 src;
	u8 cfg;
};

/**
 * struct mn - M/N:D counter
 * @mnctr_en_bit: bit to enable mn counter
 * @mnctr_reset_bit: bit to assert mn counter reset
 * @mnctr_mode_shift: lowest bit of mn counter mode field
 * @n_val_shift: lowest bit of n value field
 * @m_val_shift: lowest bit of m value field
 * @width: number of bits in m/n/d values
 * @reset_in_cc: true if the mnctr_reset_bit is in the CC register
 */
struct mn {
	u8		mnctr_en_bit;
	u8		mnctr_reset_bit;
	u8		mnctr_mode_shift;
#define MNCTR_MODE_DUAL 0x2
#define MNCTR_MODE_MASK 0x3
	u8		n_val_shift;
	u8		m_val_shift;
	u8		width;
	bool		reset_in_cc;
};

/**
 * struct pre_div - pre-divider
 * @pre_div_shift: lowest bit of pre divider field
 * @pre_div_width: number of bits in predivider
 */
struct pre_div {
	u8		pre_div_shift;
	u8		pre_div_width;
};

/**
 * struct src_sel - source selector
 * @src_sel_shift: lowest bit of source selection field
 * @parent_map: map from software's parent index to hardware's src_sel field
 */
struct src_sel {
	u8		src_sel_shift;
#define SRC_SEL_MASK	0x7
	const struct parent_map	*parent_map;
};

/**
 * struct clk_rcg - root clock generator
 *
 * @ns_reg: NS register
 * @md_reg: MD register
 * @mn: mn counter
 * @p: pre divider
 * @s: source selector
 * @freq_tbl: frequency table
 * @clkr: regmap clock handle
 * @lock: register lock
 *
 */
struct clk_rcg {
	u32		ns_reg;
	u32		md_reg;

	struct mn	mn;
	struct pre_div	p;
	struct src_sel	s;

	const struct freq_tbl	*freq_tbl;

	struct clk_regmap	clkr;
};

extern const struct clk_ops clk_rcg_ops;
extern const struct clk_ops clk_rcg_bypass_ops;
extern const struct clk_ops clk_rcg_lcc_ops;

#define to_clk_rcg(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg, clkr)

/**
 * struct clk_dyn_rcg - root clock generator with glitch free mux
 *
 * @mux_sel_bit: bit to switch glitch free mux
 * @ns_reg: NS0 and NS1 register
 * @md_reg: MD0 and MD1 register
 * @bank_reg: register to XOR @mux_sel_bit into to switch glitch free mux
 * @mn: mn counter (banked)
 * @s: source selector (banked)
 * @freq_tbl: frequency table
 * @clkr: regmap clock handle
 * @lock: register lock
 *
 */
struct clk_dyn_rcg {
	u32	ns_reg[2];
	u32	md_reg[2];
	u32	bank_reg;

	u8	mux_sel_bit;

	struct mn	mn[2];
	struct pre_div	p[2];
	struct src_sel	s[2];

	const struct freq_tbl *freq_tbl;

	struct clk_regmap clkr;
};

extern const struct clk_ops clk_dyn_rcg_ops;

#define to_clk_dyn_rcg(_hw) \
	container_of(to_clk_regmap(_hw), struct clk_dyn_rcg, clkr)

/**
 * struct clk_rcg2 - root clock generator
 *
 * @cmd_rcgr: corresponds to *_CMD_RCGR
 * @mnd_width: number of bits in m/n/d values
 * @hid_width: number of bits in half integer divider
 * @parent_map: map from software's parent index to hardware's src_sel field
 * @freq_tbl: frequency table
 * @clkr: regmap clock handle
 * @lock: register lock
 *
 */
struct clk_rcg2 {
	u32			cmd_rcgr;
	u8			mnd_width;
	u8			hid_width;
	const struct parent_map	*parent_map;
	const struct freq_tbl	*freq_tbl;
	struct clk_regmap	clkr;
};

#define to_clk_rcg2(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg2, clkr)

extern const struct clk_ops clk_rcg2_ops;
extern const struct clk_ops clk_edp_pixel_ops;
extern const struct clk_ops clk_byte_ops;
extern const struct clk_ops clk_pixel_ops;

#endif
OpenPOWER on IntegriCloud