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 if (of_machine_is_compatible("fsl,ls1021a"))
39 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
43 soc_dev_attr->family = "Freescale i.MX";
45 root = of_find_node_by_path("/");
46 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
51 switch (__mxc_cpu_type) {
77 ocotp_compat = "fsl,imx6sl-ocotp";
81 ocotp_compat = "fsl,imx6q-ocotp";
85 ocotp_compat = "fsl,imx6sx-ocotp";
89 ocotp_compat = "fsl,imx6q-ocotp";
93 ocotp_compat = "fsl,imx6ul-ocotp";
97 ocotp_compat = "fsl,imx6ull-ocotp";
100 case MXC_CPU_IMX6ULZ:
101 ocotp_compat = "fsl,imx6ull-ocotp";
104 case MXC_CPU_IMX6SLL:
105 ocotp_compat = "fsl,imx6sll-ocotp";
109 ocotp_compat = "fsl,imx7d-ocotp";
112 case MXC_CPU_IMX7ULP:
113 ocotp_compat = "fsl,imx7ulp-ocotp";
117 ocotp_compat = "fsl,vf610-ocotp";
121 ocotp_compat = "fsl,vf610-ocotp";
125 ocotp_compat = "fsl,vf610-ocotp";
129 ocotp_compat = "fsl,vf610-ocotp";
135 soc_dev_attr->soc_id = soc_id;
138 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
140 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
143 if (!IS_ERR_OR_NULL(ocotp)) {
144 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
145 regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
146 soc_uid = val & 0xffff;
147 regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
149 soc_uid |= val & 0xffff;
150 regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
152 soc_uid |= val & 0xffff;
153 regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
155 soc_uid |= val & 0xffff;
157 regmap_read(ocotp, OCOTP_UID_H, &val);
159 regmap_read(ocotp, OCOTP_UID_L, &val);
165 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
166 (imx_get_soc_revision() >> 4) & 0xf,
167 imx_get_soc_revision() & 0xf);
168 if (!soc_dev_attr->revision) {
173 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
174 if (!soc_dev_attr->serial_number) {
179 soc_dev = soc_device_register(soc_dev_attr);
180 if (IS_ERR(soc_dev)) {
181 ret = PTR_ERR(soc_dev);
182 goto free_serial_number;
188 kfree(soc_dev_attr->serial_number);
190 kfree(soc_dev_attr->revision);
195 device_initcall(imx_soc_device_init);