1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/mfd/syscon.h>
8 #include <linux/of_address.h>
9 #include <linux/regmap.h>
10 #include <linux/slab.h>
11 #include <linux/sys_soc.h>
13 #include <soc/imx/cpu.h>
14 #include <soc/imx/revision.h>
18 #define OCOTP_UID_H 0x420
19 #define OCOTP_UID_L 0x410
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
26 static int __init imx_soc_device_init(void)
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;
39 if (of_machine_is_compatible("fsl,ls1021a"))
42 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
46 soc_dev_attr->family = "Freescale i.MX";
48 root = of_find_node_by_path("/");
49 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
54 switch (__mxc_cpu_type) {
77 ocotp_compat = "fsl,imx51-iim";
81 ocotp_compat = "fsl,imx53-iim";
85 ocotp_compat = "fsl,imx6sl-ocotp";
89 ocotp_compat = "fsl,imx6q-ocotp";
93 ocotp_compat = "fsl,imx6sx-ocotp";
97 ocotp_compat = "fsl,imx6q-ocotp";
101 ocotp_compat = "fsl,imx6ul-ocotp";
104 case MXC_CPU_IMX6ULL:
105 ocotp_compat = "fsl,imx6ull-ocotp";
108 case MXC_CPU_IMX6ULZ:
109 ocotp_compat = "fsl,imx6ull-ocotp";
112 case MXC_CPU_IMX6SLL:
113 ocotp_compat = "fsl,imx6sll-ocotp";
117 ocotp_compat = "fsl,imx7d-ocotp";
120 case MXC_CPU_IMX7ULP:
121 ocotp_compat = "fsl,imx7ulp-ocotp";
125 ocotp_compat = "fsl,vf610-ocotp";
129 ocotp_compat = "fsl,vf610-ocotp";
133 ocotp_compat = "fsl,vf610-ocotp";
137 ocotp_compat = "fsl,vf610-ocotp";
143 soc_dev_attr->soc_id = soc_id;
146 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
148 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
151 if (!IS_ERR_OR_NULL(ocotp)) {
152 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
153 regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
154 soc_uid = val & 0xffff;
155 regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
157 soc_uid |= val & 0xffff;
158 regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
160 soc_uid |= val & 0xffff;
161 regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
163 soc_uid |= val & 0xffff;
164 } else if (__mxc_cpu_type == MXC_CPU_MX51 ||
165 __mxc_cpu_type == MXC_CPU_MX53) {
166 for (i=0; i < 8; i++) {
167 regmap_read(ocotp, IIM_UID + i*4, &val);
169 soc_uid |= (val & 0xff);
172 regmap_read(ocotp, OCOTP_UID_H, &val);
174 regmap_read(ocotp, OCOTP_UID_L, &val);
180 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
181 (imx_get_soc_revision() >> 4) & 0xf,
182 imx_get_soc_revision() & 0xf);
183 if (!soc_dev_attr->revision) {
188 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
189 if (!soc_dev_attr->serial_number) {
194 soc_dev = soc_device_register(soc_dev_attr);
195 if (IS_ERR(soc_dev)) {
196 ret = PTR_ERR(soc_dev);
197 goto free_serial_number;
203 kfree(soc_dev_attr->serial_number);
205 kfree(soc_dev_attr->revision);
210 device_initcall(imx_soc_device_init);