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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 | // 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 IIM_UID 0x820 #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; int i; /* Return early if this is running on devices with different SoCs */ if (!__mxc_cpu_type) 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_MX50: soc_id = "i.MX50"; break; case MXC_CPU_MX51: ocotp_compat = "fsl,imx51-iim"; soc_id = "i.MX51"; break; case MXC_CPU_MX53: ocotp_compat = "fsl,imx53-iim"; 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 if (__mxc_cpu_type == MXC_CPU_MX51 || __mxc_cpu_type == MXC_CPU_MX53) { for (i=0; i < 8; i++) { regmap_read(ocotp, IIM_UID + i*4, &val); soc_uid <<= 8; soc_uid |= (val & 0xff); } } 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); |