]> Git Repo - linux.git/blob - drivers/soc/imx/soc-imx.c
Merge tag 'trace-v5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux.git] / drivers / soc / imx / soc-imx.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright 2020 NXP
4  */
5
6 #include <linux/mfd/syscon.h>
7 #include <linux/of.h>
8 #include <linux/of_address.h>
9 #include <linux/regmap.h>
10 #include <linux/slab.h>
11 #include <linux/sys_soc.h>
12
13 #include <soc/imx/cpu.h>
14 #include <soc/imx/revision.h>
15
16 #define IIM_UID         0x820
17
18 #define OCOTP_UID_H     0x420
19 #define OCOTP_UID_L     0x410
20
21 #define OCOTP_ULP_UID_1         0x4b0
22 #define OCOTP_ULP_UID_2         0x4c0
23 #define OCOTP_ULP_UID_3         0x4d0
24 #define OCOTP_ULP_UID_4         0x4e0
25
26 static int __init imx_soc_device_init(void)
27 {
28         struct soc_device_attribute *soc_dev_attr;
29         const char *ocotp_compat = NULL;
30         struct soc_device *soc_dev;
31         struct device_node *root;
32         struct regmap *ocotp = NULL;
33         const char *soc_id;
34         u64 soc_uid = 0;
35         u32 val;
36         int ret;
37         int i;
38
39         if (of_machine_is_compatible("fsl,ls1021a"))
40                 return 0;
41
42         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
43         if (!soc_dev_attr)
44                 return -ENOMEM;
45
46         soc_dev_attr->family = "Freescale i.MX";
47
48         root = of_find_node_by_path("/");
49         ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
50         of_node_put(root);
51         if (ret)
52                 goto free_soc;
53
54         switch (__mxc_cpu_type) {
55         case MXC_CPU_MX1:
56                 soc_id = "i.MX1";
57                 break;
58         case MXC_CPU_MX21:
59                 soc_id = "i.MX21";
60                 break;
61         case MXC_CPU_MX25:
62                 soc_id = "i.MX25";
63                 break;
64         case MXC_CPU_MX27:
65                 soc_id = "i.MX27";
66                 break;
67         case MXC_CPU_MX31:
68                 soc_id = "i.MX31";
69                 break;
70         case MXC_CPU_MX35:
71                 soc_id = "i.MX35";
72                 break;
73         case MXC_CPU_MX51:
74                 ocotp_compat = "fsl,imx51-iim";
75                 soc_id = "i.MX51";
76                 break;
77         case MXC_CPU_MX53:
78                 ocotp_compat = "fsl,imx53-iim";
79                 soc_id = "i.MX53";
80                 break;
81         case MXC_CPU_IMX6SL:
82                 ocotp_compat = "fsl,imx6sl-ocotp";
83                 soc_id = "i.MX6SL";
84                 break;
85         case MXC_CPU_IMX6DL:
86                 ocotp_compat = "fsl,imx6q-ocotp";
87                 soc_id = "i.MX6DL";
88                 break;
89         case MXC_CPU_IMX6SX:
90                 ocotp_compat = "fsl,imx6sx-ocotp";
91                 soc_id = "i.MX6SX";
92                 break;
93         case MXC_CPU_IMX6Q:
94                 ocotp_compat = "fsl,imx6q-ocotp";
95                 soc_id = "i.MX6Q";
96                 break;
97         case MXC_CPU_IMX6UL:
98                 ocotp_compat = "fsl,imx6ul-ocotp";
99                 soc_id = "i.MX6UL";
100                 break;
101         case MXC_CPU_IMX6ULL:
102                 ocotp_compat = "fsl,imx6ull-ocotp";
103                 soc_id = "i.MX6ULL";
104                 break;
105         case MXC_CPU_IMX6ULZ:
106                 ocotp_compat = "fsl,imx6ull-ocotp";
107                 soc_id = "i.MX6ULZ";
108                 break;
109         case MXC_CPU_IMX6SLL:
110                 ocotp_compat = "fsl,imx6sll-ocotp";
111                 soc_id = "i.MX6SLL";
112                 break;
113         case MXC_CPU_IMX7D:
114                 ocotp_compat = "fsl,imx7d-ocotp";
115                 soc_id = "i.MX7D";
116                 break;
117         case MXC_CPU_IMX7ULP:
118                 ocotp_compat = "fsl,imx7ulp-ocotp";
119                 soc_id = "i.MX7ULP";
120                 break;
121         case MXC_CPU_VF500:
122                 ocotp_compat = "fsl,vf610-ocotp";
123                 soc_id = "VF500";
124                 break;
125         case MXC_CPU_VF510:
126                 ocotp_compat = "fsl,vf610-ocotp";
127                 soc_id = "VF510";
128                 break;
129         case MXC_CPU_VF600:
130                 ocotp_compat = "fsl,vf610-ocotp";
131                 soc_id = "VF600";
132                 break;
133         case MXC_CPU_VF610:
134                 ocotp_compat = "fsl,vf610-ocotp";
135                 soc_id = "VF610";
136                 break;
137         default:
138                 soc_id = "Unknown";
139         }
140         soc_dev_attr->soc_id = soc_id;
141
142         if (ocotp_compat) {
143                 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
144                 if (IS_ERR(ocotp))
145                         pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
146         }
147
148         if (!IS_ERR_OR_NULL(ocotp)) {
149                 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
150                         regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
151                         soc_uid = val & 0xffff;
152                         regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
153                         soc_uid <<= 16;
154                         soc_uid |= val & 0xffff;
155                         regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
156                         soc_uid <<= 16;
157                         soc_uid |= val & 0xffff;
158                         regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
159                         soc_uid <<= 16;
160                         soc_uid |= val & 0xffff;
161                 } else if (__mxc_cpu_type == MXC_CPU_MX51 ||
162                            __mxc_cpu_type == MXC_CPU_MX53) {
163                         for (i=0; i < 8; i++) {
164                                 regmap_read(ocotp, IIM_UID + i*4, &val);
165                                 soc_uid <<= 8;
166                                 soc_uid |= (val & 0xff);
167                         }
168                 } else {
169                         regmap_read(ocotp, OCOTP_UID_H, &val);
170                         soc_uid = val;
171                         regmap_read(ocotp, OCOTP_UID_L, &val);
172                         soc_uid <<= 32;
173                         soc_uid |= val;
174                 }
175         }
176
177         soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
178                                            (imx_get_soc_revision() >> 4) & 0xf,
179                                            imx_get_soc_revision() & 0xf);
180         if (!soc_dev_attr->revision) {
181                 ret = -ENOMEM;
182                 goto free_soc;
183         }
184
185         soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
186         if (!soc_dev_attr->serial_number) {
187                 ret = -ENOMEM;
188                 goto free_rev;
189         }
190
191         soc_dev = soc_device_register(soc_dev_attr);
192         if (IS_ERR(soc_dev)) {
193                 ret = PTR_ERR(soc_dev);
194                 goto free_serial_number;
195         }
196
197         return 0;
198
199 free_serial_number:
200         kfree(soc_dev_attr->serial_number);
201 free_rev:
202         kfree(soc_dev_attr->revision);
203 free_soc:
204         kfree(soc_dev_attr);
205         return ret;
206 }
207 device_initcall(imx_soc_device_init);
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