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
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include "clk-regmap.h"
static int clk_regmap_gate_endisable(struct clk_hw *hw, int enable)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_gate_data *gate = clk_get_regmap_gate_data(clk);
int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
set ^= enable;
return regmap_update_bits(clk->map, gate->offset, BIT(gate->bit_idx),
set ? BIT(gate->bit_idx) : 0);
}
static int clk_regmap_gate_enable(struct clk_hw *hw)
{
return clk_regmap_gate_endisable(hw, 1);
}
static void clk_regmap_gate_disable(struct clk_hw *hw)
{
clk_regmap_gate_endisable(hw, 0);
}
static int clk_regmap_gate_is_enabled(struct clk_hw *hw)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_gate_data *gate = clk_get_regmap_gate_data(clk);
unsigned int val;
regmap_read(clk->map, gate->offset, &val);
if (gate->flags & CLK_GATE_SET_TO_DISABLE)
val ^= BIT(gate->bit_idx);
val &= BIT(gate->bit_idx);
return val ? 1 : 0;
}
const struct clk_ops clk_regmap_gate_ops = {
.enable = clk_regmap_gate_enable,
.disable = clk_regmap_gate_disable,
.is_enabled = clk_regmap_gate_is_enabled,
};
EXPORT_SYMBOL_GPL(clk_regmap_gate_ops);
static unsigned long clk_regmap_div_recalc_rate(struct clk_hw *hw,
unsigned long prate)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_div_data *div = clk_get_regmap_div_data(clk);
unsigned int val;
int ret;
ret = regmap_read(clk->map, div->offset, &val);
if (ret)
/* Gives a hint that something is wrong */
return 0;
val >>= div->shift;
val &= clk_div_mask(div->width);
return divider_recalc_rate(hw, prate, val, div->table, div->flags,
div->width);
}
static long clk_regmap_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_div_data *div = clk_get_regmap_div_data(clk);
unsigned int val;
int ret;
/* if read only, just return current value */
if (div->flags & CLK_DIVIDER_READ_ONLY) {
ret = regmap_read(clk->map, div->offset, &val);
if (ret)
/* Gives a hint that something is wrong */
return 0;
val >>= div->shift;
val &= clk_div_mask(div->width);
return divider_ro_round_rate(hw, rate, prate, div->table,
div->width, div->flags, val);
}
return divider_round_rate(hw, rate, prate, div->table, div->width,
div->flags);
}
static int clk_regmap_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_div_data *div = clk_get_regmap_div_data(clk);
unsigned int val;
int ret;
ret = divider_get_val(rate, parent_rate, div->table, div->width,
div->flags);
if (ret < 0)
return ret;
val = (unsigned int)ret << div->shift;
return regmap_update_bits(clk->map, div->offset,
clk_div_mask(div->width) << div->shift, val);
};
/* Would prefer clk_regmap_div_ro_ops but clashes with qcom */
const struct clk_ops clk_regmap_divider_ops = {
.recalc_rate = clk_regmap_div_recalc_rate,
.round_rate = clk_regmap_div_round_rate,
.set_rate = clk_regmap_div_set_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_divider_ops);
const struct clk_ops clk_regmap_divider_ro_ops = {
.recalc_rate = clk_regmap_div_recalc_rate,
.round_rate = clk_regmap_div_round_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_divider_ro_ops);
static u8 clk_regmap_mux_get_parent(struct clk_hw *hw)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_mux_data *mux = clk_get_regmap_mux_data(clk);
unsigned int val;
int ret;
ret = regmap_read(clk->map, mux->offset, &val);
if (ret)
return ret;
val >>= mux->shift;
val &= mux->mask;
return clk_mux_val_to_index(hw, mux->table, mux->flags, val);
}
static int clk_regmap_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct clk_regmap_mux_data *mux = clk_get_regmap_mux_data(clk);
unsigned int val = clk_mux_index_to_val(mux->table, mux->flags, index);
return regmap_update_bits(clk->map, mux->offset,
mux->mask << mux->shift,
val << mux->shift);
}
const struct clk_ops clk_regmap_mux_ops = {
.get_parent = clk_regmap_mux_get_parent,
.set_parent = clk_regmap_mux_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_mux_ops);
const struct clk_ops clk_regmap_mux_ro_ops = {
.get_parent = clk_regmap_mux_get_parent,
};
EXPORT_SYMBOL_GPL(clk_regmap_mux_ro_ops);
|
