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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2020 NXP
*/
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <soc/imx/cpu.h>
#include <soc/imx/revision.h>
#define OCOTP_UID_H 0x420
#define OCOTP_UID_L 0x410
#define OCOTP_ULP_UID_1 0x4b0
#define OCOTP_ULP_UID_2 0x4c0
#define OCOTP_ULP_UID_3 0x4d0
#define OCOTP_ULP_UID_4 0x4e0
static int __init imx_soc_device_init(void)
{
struct soc_device_attribute *soc_dev_attr;
const char *ocotp_compat = NULL;
struct soc_device *soc_dev;
struct device_node *root;
struct regmap *ocotp = NULL;
const char *soc_id;
u64 soc_uid = 0;
u32 val;
int ret;
if (of_machine_is_compatible("fsl,ls1021a"))
return 0;
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return -ENOMEM;
soc_dev_attr->family = "Freescale i.MX";
root = of_find_node_by_path("/");
ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
of_node_put(root);
if (ret)
goto free_soc;
switch (__mxc_cpu_type) {
case MXC_CPU_MX1:
soc_id = "i.MX1";
break;
case MXC_CPU_MX21:
soc_id = "i.MX21";
break;
case MXC_CPU_MX25:
soc_id = "i.MX25";
break;
case MXC_CPU_MX27:
soc_id = "i.MX27";
break;
case MXC_CPU_MX31:
soc_id = "i.MX31";
break;
case MXC_CPU_MX35:
soc_id = "i.MX35";
break;
case MXC_CPU_MX51:
soc_id = "i.MX51";
break;
case MXC_CPU_MX53:
soc_id = "i.MX53";
break;
case MXC_CPU_IMX6SL:
ocotp_compat = "fsl,imx6sl-ocotp";
soc_id = "i.MX6SL";
break;
case MXC_CPU_IMX6DL:
ocotp_compat = "fsl,imx6q-ocotp";
soc_id = "i.MX6DL";
break;
case MXC_CPU_IMX6SX:
ocotp_compat = "fsl,imx6sx-ocotp";
soc_id = "i.MX6SX";
break;
case MXC_CPU_IMX6Q:
ocotp_compat = "fsl,imx6q-ocotp";
soc_id = "i.MX6Q";
break;
case MXC_CPU_IMX6UL:
ocotp_compat = "fsl,imx6ul-ocotp";
soc_id = "i.MX6UL";
break;
case MXC_CPU_IMX6ULL:
ocotp_compat = "fsl,imx6ull-ocotp";
soc_id = "i.MX6ULL";
break;
case MXC_CPU_IMX6ULZ:
ocotp_compat = "fsl,imx6ull-ocotp";
soc_id = "i.MX6ULZ";
break;
case MXC_CPU_IMX6SLL:
ocotp_compat = "fsl,imx6sll-ocotp";
soc_id = "i.MX6SLL";
break;
case MXC_CPU_IMX7D:
ocotp_compat = "fsl,imx7d-ocotp";
soc_id = "i.MX7D";
break;
case MXC_CPU_IMX7ULP:
ocotp_compat = "fsl,imx7ulp-ocotp";
soc_id = "i.MX7ULP";
break;
case MXC_CPU_VF500:
ocotp_compat = "fsl,vf610-ocotp";
soc_id = "VF500";
break;
case MXC_CPU_VF510:
ocotp_compat = "fsl,vf610-ocotp";
soc_id = "VF510";
break;
case MXC_CPU_VF600:
ocotp_compat = "fsl,vf610-ocotp";
soc_id = "VF600";
break;
case MXC_CPU_VF610:
ocotp_compat = "fsl,vf610-ocotp";
soc_id = "VF610";
break;
default:
soc_id = "Unknown";
}
soc_dev_attr->soc_id = soc_id;
if (ocotp_compat) {
ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
if (IS_ERR(ocotp))
pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
}
if (!IS_ERR_OR_NULL(ocotp)) {
if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
soc_uid = val & 0xffff;
regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
soc_uid <<= 16;
soc_uid |= val & 0xffff;
regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
soc_uid <<= 16;
soc_uid |= val & 0xffff;
regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
soc_uid <<= 16;
soc_uid |= val & 0xffff;
} else {
regmap_read(ocotp, OCOTP_UID_H, &val);
soc_uid = val;
regmap_read(ocotp, OCOTP_UID_L, &val);
soc_uid <<= 32;
soc_uid |= val;
}
}
soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
(imx_get_soc_revision() >> 4) & 0xf,
imx_get_soc_revision() & 0xf);
if (!soc_dev_attr->revision) {
ret = -ENOMEM;
goto free_soc;
}
soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
if (!soc_dev_attr->serial_number) {
ret = -ENOMEM;
goto free_rev;
}
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR(soc_dev)) {
ret = PTR_ERR(soc_dev);
goto free_serial_number;
}
return 0;
free_serial_number:
kfree(soc_dev_attr->serial_number);
free_rev:
kfree(soc_dev_attr->revision);
free_soc:
kfree(soc_dev_attr);
return ret;
}
device_initcall(imx_soc_device_init);
|
