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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2013 NVIDIA CORPORATION. All rights reserved.
* Copyright 2019 NXP
*/
#include <common.h>
#include <asm/io.h>
#include <malloc.h>
#include <clk-uclass.h>
#include <dm/device.h>
#include <dm/devres.h>
#include <linux/clk-provider.h>
#include <clk.h>
#include <linux/err.h>
#include "clk.h"
#define UBOOT_DM_CLK_COMPOSITE "clk_composite"
static u8 clk_composite_get_parent(struct clk *clk)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
struct clk *mux = composite->mux;
return clk_mux_get_parent(mux);
}
static int clk_composite_set_parent(struct clk *clk, struct clk *parent)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
const struct clk_ops *mux_ops = composite->mux_ops;
struct clk *mux = composite->mux;
return mux_ops->set_parent(mux, parent);
}
static unsigned long clk_composite_recalc_rate(struct clk *clk)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
const struct clk_ops *rate_ops = composite->rate_ops;
struct clk *rate = composite->rate;
return rate_ops->get_rate(rate);
}
static ulong clk_composite_set_rate(struct clk *clk, unsigned long rate)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
const struct clk_ops *rate_ops = composite->rate_ops;
struct clk *clk_rate = composite->rate;
return rate_ops->set_rate(clk_rate, rate);
}
static int clk_composite_enable(struct clk *clk)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
const struct clk_ops *gate_ops = composite->gate_ops;
struct clk *gate = composite->gate;
return gate_ops->enable(gate);
}
static int clk_composite_disable(struct clk *clk)
{
struct clk_composite *composite = to_clk_composite(clk_dev_binded(clk) ?
(struct clk *)dev_get_clk_ptr(clk->dev) : clk);
const struct clk_ops *gate_ops = composite->gate_ops;
struct clk *gate = composite->gate;
gate_ops->disable(gate);
return 0;
}
struct clk_ops clk_composite_ops = {
/* This will be set according to clk_register_composite */
};
struct clk *clk_register_composite(struct device *dev, const char *name,
const char * const *parent_names,
int num_parents, struct clk *mux,
const struct clk_ops *mux_ops,
struct clk *rate,
const struct clk_ops *rate_ops,
struct clk *gate,
const struct clk_ops *gate_ops,
unsigned long flags)
{
struct clk *clk;
struct clk_composite *composite;
int ret;
struct clk_ops *composite_ops = &clk_composite_ops;
composite = kzalloc(sizeof(*composite), GFP_KERNEL);
if (!composite)
return ERR_PTR(-ENOMEM);
if (mux && mux_ops) {
composite->mux = mux;
composite->mux_ops = mux_ops;
if (mux_ops->set_parent)
composite_ops->set_parent = clk_composite_set_parent;
mux->data = (ulong)composite;
}
if (rate && rate_ops) {
if (!rate_ops->get_rate) {
clk = ERR_PTR(-EINVAL);
goto err;
}
composite_ops->get_rate = clk_composite_recalc_rate;
/* .set_rate requires either .round_rate or .determine_rate */
if (rate_ops->set_rate)
composite_ops->set_rate = clk_composite_set_rate;
composite->rate = rate;
composite->rate_ops = rate_ops;
rate->data = (ulong)composite;
}
if (gate && gate_ops) {
if (!gate_ops->enable || !gate_ops->disable) {
clk = ERR_PTR(-EINVAL);
goto err;
}
composite->gate = gate;
composite->gate_ops = gate_ops;
composite_ops->enable = clk_composite_enable;
composite_ops->disable = clk_composite_disable;
gate->data = (ulong)composite;
}
clk = &composite->clk;
ret = clk_register(clk, UBOOT_DM_CLK_COMPOSITE, name,
parent_names[clk_composite_get_parent(clk)]);
if (ret) {
clk = ERR_PTR(ret);
goto err;
}
return clk;
err:
kfree(composite);
return clk;
}
U_BOOT_DRIVER(clk_composite) = {
.name = UBOOT_DM_CLK_COMPOSITE,
.id = UCLASS_CLK,
.ops = &clk_composite_ops,
.flags = DM_FLAG_PRE_RELOC,
};
|
