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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Xilinx, Inc.
*/
#include <common.h>
#include <command.h>
#include <clk.h>
#if defined(CONFIG_DM) && defined(CONFIG_CLK)
#include <dm.h>
#include <dm/device.h>
#include <dm/root.h>
#include <dm/device-internal.h>
#include <linux/clk-provider.h>
#endif
#if defined(CONFIG_DM) && defined(CONFIG_CLK)
static void show_clks(struct udevice *dev, int depth, int last_flag)
{
int i, is_last;
struct udevice *child;
struct clk *clkp, *parent;
u32 rate;
clkp = dev_get_clk_ptr(dev);
if (clkp) {
parent = clk_get_parent(clkp);
if (!IS_ERR(parent) && depth == -1)
return;
depth++;
rate = clk_get_rate(clkp);
printf(" %-12u %8d ", rate, clkp->enable_count);
for (i = depth; i >= 0; i--) {
is_last = (last_flag >> i) & 1;
if (i) {
if (is_last)
printf(" ");
else
printf("| ");
} else {
if (is_last)
printf("`-- ");
else
printf("|-- ");
}
}
printf("%s\n", dev->name);
}
device_foreach_child_probe(child, dev) {
if (device_get_uclass_id(child) != UCLASS_CLK)
continue;
if (child == dev)
continue;
is_last = list_is_last(&child->sibling_node, &dev->child_head);
show_clks(child, depth, (last_flag << 1) | is_last);
}
}
int __weak soc_clk_dump(void)
{
struct udevice *dev;
printf(" Rate Usecnt Name\n");
printf("------------------------------------------\n");
uclass_foreach_dev_probe(UCLASS_CLK, dev)
show_clks(dev, -1, 0);
return 0;
}
#else
int __weak soc_clk_dump(void)
{
puts("Not implemented\n");
return 1;
}
#endif
static int do_clk_dump(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int ret;
ret = soc_clk_dump();
if (ret < 0) {
printf("Clock dump error %d\n", ret);
ret = CMD_RET_FAILURE;
}
return ret;
}
#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
static int do_clk_setfreq(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct clk *clk = NULL;
s32 freq;
struct udevice *dev;
if (argc != 3)
return CMD_RET_USAGE;
freq = dectoul(argv[2], NULL);
if (!uclass_get_device_by_name(UCLASS_CLK, argv[1], &dev))
clk = dev_get_clk_ptr(dev);
if (!clk) {
printf("clock '%s' not found.\n", argv[1]);
return CMD_RET_FAILURE;
}
freq = clk_set_rate(clk, freq);
if (freq < 0) {
printf("set_rate failed: %d\n", freq);
return CMD_RET_FAILURE;
}
printf("set_rate returns %u\n", freq);
return 0;
}
#endif
static struct cmd_tbl cmd_clk_sub[] = {
U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
U_BOOT_CMD_MKENT(setfreq, 3, 1, do_clk_setfreq, "", ""),
#endif
};
static int do_clk(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct cmd_tbl *c;
if (argc < 2)
return CMD_RET_USAGE;
/* Strip off leading 'clk' command argument */
argc--;
argv++;
c = find_cmd_tbl(argv[0], &cmd_clk_sub[0], ARRAY_SIZE(cmd_clk_sub));
if (c)
return c->cmd(cmdtp, flag, argc, argv);
else
return CMD_RET_USAGE;
}
#ifdef CONFIG_SYS_LONGHELP
static char clk_help_text[] =
"dump - Print clock frequencies\n"
"clk setfreq [clk] [freq] - Set clock frequency";
#endif
U_BOOT_CMD(clk, 4, 1, do_clk, "CLK sub-system", clk_help_text);
|