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210 lines
4.5 KiB
210 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright 2020 NXP |
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*/ |
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#include <linux/mfd/syscon.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/sys_soc.h> |
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#include <soc/imx/cpu.h> |
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#include <soc/imx/revision.h> |
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#define IIM_UID 0x820 |
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#define OCOTP_UID_H 0x420 |
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#define OCOTP_UID_L 0x410 |
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#define OCOTP_ULP_UID_1 0x4b0 |
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#define OCOTP_ULP_UID_2 0x4c0 |
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#define OCOTP_ULP_UID_3 0x4d0 |
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#define OCOTP_ULP_UID_4 0x4e0 |
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static int __init imx_soc_device_init(void) |
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{ |
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struct soc_device_attribute *soc_dev_attr; |
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const char *ocotp_compat = NULL; |
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struct soc_device *soc_dev; |
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struct device_node *root; |
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struct regmap *ocotp = NULL; |
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const char *soc_id; |
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u64 soc_uid = 0; |
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u32 val; |
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int ret; |
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int i; |
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if (of_machine_is_compatible("fsl,ls1021a")) |
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return 0; |
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
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if (!soc_dev_attr) |
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return -ENOMEM; |
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soc_dev_attr->family = "Freescale i.MX"; |
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root = of_find_node_by_path("/"); |
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ret = of_property_read_string(root, "model", &soc_dev_attr->machine); |
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of_node_put(root); |
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if (ret) |
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goto free_soc; |
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switch (__mxc_cpu_type) { |
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case MXC_CPU_MX1: |
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soc_id = "i.MX1"; |
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break; |
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case MXC_CPU_MX21: |
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soc_id = "i.MX21"; |
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break; |
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case MXC_CPU_MX25: |
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soc_id = "i.MX25"; |
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break; |
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case MXC_CPU_MX27: |
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soc_id = "i.MX27"; |
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break; |
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case MXC_CPU_MX31: |
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soc_id = "i.MX31"; |
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break; |
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case MXC_CPU_MX35: |
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soc_id = "i.MX35"; |
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break; |
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case MXC_CPU_MX50: |
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soc_id = "i.MX50"; |
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break; |
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case MXC_CPU_MX51: |
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ocotp_compat = "fsl,imx51-iim"; |
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soc_id = "i.MX51"; |
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break; |
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case MXC_CPU_MX53: |
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ocotp_compat = "fsl,imx53-iim"; |
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soc_id = "i.MX53"; |
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break; |
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case MXC_CPU_IMX6SL: |
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ocotp_compat = "fsl,imx6sl-ocotp"; |
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soc_id = "i.MX6SL"; |
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break; |
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case MXC_CPU_IMX6DL: |
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ocotp_compat = "fsl,imx6q-ocotp"; |
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soc_id = "i.MX6DL"; |
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break; |
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case MXC_CPU_IMX6SX: |
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ocotp_compat = "fsl,imx6sx-ocotp"; |
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soc_id = "i.MX6SX"; |
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break; |
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case MXC_CPU_IMX6Q: |
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ocotp_compat = "fsl,imx6q-ocotp"; |
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soc_id = "i.MX6Q"; |
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break; |
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case MXC_CPU_IMX6UL: |
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ocotp_compat = "fsl,imx6ul-ocotp"; |
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soc_id = "i.MX6UL"; |
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break; |
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case MXC_CPU_IMX6ULL: |
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ocotp_compat = "fsl,imx6ull-ocotp"; |
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soc_id = "i.MX6ULL"; |
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break; |
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case MXC_CPU_IMX6ULZ: |
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ocotp_compat = "fsl,imx6ull-ocotp"; |
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soc_id = "i.MX6ULZ"; |
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break; |
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case MXC_CPU_IMX6SLL: |
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ocotp_compat = "fsl,imx6sll-ocotp"; |
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soc_id = "i.MX6SLL"; |
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break; |
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case MXC_CPU_IMX7D: |
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ocotp_compat = "fsl,imx7d-ocotp"; |
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soc_id = "i.MX7D"; |
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break; |
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case MXC_CPU_IMX7ULP: |
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ocotp_compat = "fsl,imx7ulp-ocotp"; |
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soc_id = "i.MX7ULP"; |
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break; |
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case MXC_CPU_VF500: |
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ocotp_compat = "fsl,vf610-ocotp"; |
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soc_id = "VF500"; |
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break; |
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case MXC_CPU_VF510: |
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ocotp_compat = "fsl,vf610-ocotp"; |
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soc_id = "VF510"; |
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break; |
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case MXC_CPU_VF600: |
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ocotp_compat = "fsl,vf610-ocotp"; |
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soc_id = "VF600"; |
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break; |
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case MXC_CPU_VF610: |
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ocotp_compat = "fsl,vf610-ocotp"; |
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soc_id = "VF610"; |
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break; |
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default: |
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soc_id = "Unknown"; |
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} |
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soc_dev_attr->soc_id = soc_id; |
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if (ocotp_compat) { |
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ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat); |
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if (IS_ERR(ocotp)) |
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pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat); |
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} |
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if (!IS_ERR_OR_NULL(ocotp)) { |
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if (__mxc_cpu_type == MXC_CPU_IMX7ULP) { |
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regmap_read(ocotp, OCOTP_ULP_UID_4, &val); |
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soc_uid = val & 0xffff; |
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regmap_read(ocotp, OCOTP_ULP_UID_3, &val); |
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soc_uid <<= 16; |
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soc_uid |= val & 0xffff; |
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regmap_read(ocotp, OCOTP_ULP_UID_2, &val); |
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soc_uid <<= 16; |
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soc_uid |= val & 0xffff; |
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regmap_read(ocotp, OCOTP_ULP_UID_1, &val); |
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soc_uid <<= 16; |
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soc_uid |= val & 0xffff; |
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} else if (__mxc_cpu_type == MXC_CPU_MX51 || |
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__mxc_cpu_type == MXC_CPU_MX53) { |
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for (i=0; i < 8; i++) { |
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regmap_read(ocotp, IIM_UID + i*4, &val); |
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soc_uid <<= 8; |
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soc_uid |= (val & 0xff); |
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} |
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} else { |
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regmap_read(ocotp, OCOTP_UID_H, &val); |
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soc_uid = val; |
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regmap_read(ocotp, OCOTP_UID_L, &val); |
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soc_uid <<= 32; |
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soc_uid |= val; |
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} |
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} |
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soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d", |
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(imx_get_soc_revision() >> 4) & 0xf, |
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imx_get_soc_revision() & 0xf); |
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if (!soc_dev_attr->revision) { |
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ret = -ENOMEM; |
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goto free_soc; |
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} |
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soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid); |
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if (!soc_dev_attr->serial_number) { |
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ret = -ENOMEM; |
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goto free_rev; |
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} |
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soc_dev = soc_device_register(soc_dev_attr); |
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if (IS_ERR(soc_dev)) { |
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ret = PTR_ERR(soc_dev); |
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goto free_serial_number; |
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} |
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return 0; |
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free_serial_number: |
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kfree(soc_dev_attr->serial_number); |
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free_rev: |
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kfree(soc_dev_attr->revision); |
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free_soc: |
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kfree(soc_dev_attr); |
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return ret; |
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} |
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device_initcall(imx_soc_device_init);
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