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>
16 #define OCOTP_UID_H 0x420
17 #define OCOTP_UID_L 0x410
19 #define OCOTP_ULP_UID_1 0x4b0
20 #define OCOTP_ULP_UID_2 0x4c0
21 #define OCOTP_ULP_UID_3 0x4d0
22 #define OCOTP_ULP_UID_4 0x4e0
24 static int __init imx_soc_device_init(void)
26 struct soc_device_attribute *soc_dev_attr;
27 const char *ocotp_compat = NULL;
28 struct soc_device *soc_dev;
29 struct device_node *root;
30 struct regmap *ocotp = NULL;
36 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
40 soc_dev_attr->family = "Freescale i.MX";
42 root = of_find_node_by_path("/");
43 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
48 switch (__mxc_cpu_type) {
74 ocotp_compat = "fsl,imx6sl-ocotp";
78 ocotp_compat = "fsl,imx6q-ocotp";
82 ocotp_compat = "fsl,imx6sx-ocotp";
86 ocotp_compat = "fsl,imx6q-ocotp";
90 ocotp_compat = "fsl,imx6ul-ocotp";
94 ocotp_compat = "fsl,imx6ull-ocotp";
98 ocotp_compat = "fsl,imx6ull-ocotp";
101 case MXC_CPU_IMX6SLL:
102 ocotp_compat = "fsl,imx6sll-ocotp";
106 ocotp_compat = "fsl,imx7d-ocotp";
109 case MXC_CPU_IMX7ULP:
110 ocotp_compat = "fsl,imx7ulp-ocotp";
114 ocotp_compat = "fsl,vf610-ocotp";
118 ocotp_compat = "fsl,vf610-ocotp";
122 ocotp_compat = "fsl,vf610-ocotp";
126 ocotp_compat = "fsl,vf610-ocotp";
132 soc_dev_attr->soc_id = soc_id;
135 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
137 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
140 if (!IS_ERR_OR_NULL(ocotp)) {
141 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
142 regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
143 soc_uid = val & 0xffff;
144 regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
146 soc_uid |= val & 0xffff;
147 regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
149 soc_uid |= val & 0xffff;
150 regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
152 soc_uid |= val & 0xffff;
154 regmap_read(ocotp, OCOTP_UID_H, &val);
156 regmap_read(ocotp, OCOTP_UID_L, &val);
162 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
163 (imx_get_soc_revision() >> 4) & 0xf,
164 imx_get_soc_revision() & 0xf);
165 if (!soc_dev_attr->revision) {
170 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
171 if (!soc_dev_attr->serial_number) {
176 soc_dev = soc_device_register(soc_dev_attr);
177 if (IS_ERR(soc_dev)) {
178 ret = PTR_ERR(soc_dev);
179 goto free_serial_number;
185 kfree(soc_dev_attr->serial_number);
187 kfree(soc_dev_attr->revision);
192 device_initcall(imx_soc_device_init);