drivers/soc/qcom/socinfo.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
  * Copyright (c) 2017-2019, Linaro Ltd.
  */

 #include <linux/debugfs.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/random.h>
 #include <linux/slab.h>
 #include <linux/soc/qcom/smem.h>
 #include <linux/string.h>
 #include <linux/sys_soc.h>
 #include <linux/types.h>

 /*
  * SoC version type with major number in the upper 16 bits and minor
  * number in the lower 16 bits.
  */
 #define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
 #define SOCINFO_MINOR(ver) ((ver) & 0xffff)
 #define SOCINFO_VERSION(maj, min)  ((((maj) & 0xffff) << 16)|((min) & 0xffff))

 #define SMEM_SOCINFO_BUILD_ID_LENGTH           32
 #define SMEM_SOCINFO_CHIP_ID_LENGTH            32

 /*
  * SMEM item id, used to acquire handles to respective
  * SMEM region.
  */
 #define SMEM_HW_SW_BUILD_ID            137

 #ifdef CONFIG_DEBUG_FS
 #define SMEM_IMAGE_VERSION_BLOCKS_COUNT        32
 #define SMEM_IMAGE_VERSION_SIZE                4096
 #define SMEM_IMAGE_VERSION_NAME_SIZE           75
 #define SMEM_IMAGE_VERSION_VARIANT_SIZE        20
 #define SMEM_IMAGE_VERSION_OEM_SIZE            32

 /*
  * SMEM Image table indices
  */
 #define SMEM_IMAGE_TABLE_BOOT_INDEX     0
 #define SMEM_IMAGE_TABLE_TZ_INDEX       1
 #define SMEM_IMAGE_TABLE_RPM_INDEX      3
 #define SMEM_IMAGE_TABLE_APPS_INDEX     10
 #define SMEM_IMAGE_TABLE_MPSS_INDEX     11
 #define SMEM_IMAGE_TABLE_ADSP_INDEX     12
 #define SMEM_IMAGE_TABLE_CNSS_INDEX     13
 #define SMEM_IMAGE_TABLE_VIDEO_INDEX    14
 #define SMEM_IMAGE_VERSION_TABLE       469

 /*
  * SMEM Image table names
  */
 static const char *const socinfo_image_names[] = {
 	[SMEM_IMAGE_TABLE_ADSP_INDEX] = "adsp",
 	[SMEM_IMAGE_TABLE_APPS_INDEX] = "apps",
 	[SMEM_IMAGE_TABLE_BOOT_INDEX] = "boot",
 	[SMEM_IMAGE_TABLE_CNSS_INDEX] = "cnss",
 	[SMEM_IMAGE_TABLE_MPSS_INDEX] = "mpss",
 	[SMEM_IMAGE_TABLE_RPM_INDEX] = "rpm",
 	[SMEM_IMAGE_TABLE_TZ_INDEX] = "tz",
 	[SMEM_IMAGE_TABLE_VIDEO_INDEX] = "video",
 };

 static const char *const pmic_models[] = {
 	[0]  = "Unknown PMIC model",
 	[9]  = "PM8994",
 	[11] = "PM8916",
 	[13] = "PM8058",
 	[14] = "PM8028",
 	[15] = "PM8901",
 	[16] = "PM8027",
 	[17] = "ISL9519",
 	[18] = "PM8921",
 	[19] = "PM8018",
 	[20] = "PM8015",
 	[21] = "PM8014",
 	[22] = "PM8821",
 	[23] = "PM8038",
 	[24] = "PM8922",
 	[25] = "PM8917",
 };
 #endif /* CONFIG_DEBUG_FS */

 /* Socinfo SMEM item structure */
 struct socinfo {
 	__le32 fmt;
 	__le32 id;
 	__le32 ver;
 	char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
 	/* Version 2 */
 	__le32 raw_id;
 	__le32 raw_ver;
 	/* Version 3 */
 	__le32 hw_plat;
 	/* Version 4 */
 	__le32 plat_ver;
 	/* Version 5 */
 	__le32 accessory_chip;
 	/* Version 6 */
 	__le32 hw_plat_subtype;
 	/* Version 7 */
 	__le32 pmic_model;
 	__le32 pmic_die_rev;
 	/* Version 8 */
 	__le32 pmic_model_1;
 	__le32 pmic_die_rev_1;
 	__le32 pmic_model_2;
 	__le32 pmic_die_rev_2;
 	/* Version 9 */
 	__le32 foundry_id;
 	/* Version 10 */
 	__le32 serial_num;
 	/* Version 11 */
 	__le32 num_pmics;
 	__le32 pmic_array_offset;
 	/* Version 12 */
 	__le32 chip_family;
 	__le32 raw_device_family;
 	__le32 raw_device_num;
 	/* Version 13 */
 	__le32 nproduct_id;
 	char chip_id[SMEM_SOCINFO_CHIP_ID_LENGTH];
 	/* Version 14 */
 	__le32 num_clusters;
 	__le32 ncluster_array_offset;
 	__le32 num_defective_parts;
 	__le32 ndefective_parts_array_offset;
 	/* Version 15 */
 	__le32 nmodem_supported;
 };

 #ifdef CONFIG_DEBUG_FS
 struct socinfo_params {
 	u32 raw_device_family;
 	u32 hw_plat_subtype;
 	u32 accessory_chip;
 	u32 raw_device_num;
 	u32 chip_family;
 	u32 foundry_id;
 	u32 plat_ver;
 	u32 raw_ver;
 	u32 hw_plat;
 	u32 fmt;
 	u32 nproduct_id;
 	u32 num_clusters;
 	u32 ncluster_array_offset;
 	u32 num_defective_parts;
 	u32 ndefective_parts_array_offset;
 	u32 nmodem_supported;
 };

 struct smem_image_version {
 	char name[SMEM_IMAGE_VERSION_NAME_SIZE];
 	char variant[SMEM_IMAGE_VERSION_VARIANT_SIZE];
 	char pad;
 	char oem[SMEM_IMAGE_VERSION_OEM_SIZE];
 };
 #endif /* CONFIG_DEBUG_FS */

 struct qcom_socinfo {
 	struct soc_device *soc_dev;
 	struct soc_device_attribute attr;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *dbg_root;
 	struct socinfo_params info;
 #endif /* CONFIG_DEBUG_FS */
 };

 struct soc_id {
 	unsigned int id;
 	const char *name;
 };

 static const struct soc_id soc_id[] = {
 	{ 87, "MSM8960" },
 	{ 109, "APQ8064" },
 	{ 122, "MSM8660A" },
 	{ 123, "MSM8260A" },
 	{ 124, "APQ8060A" },
 	{ 126, "MSM8974" },
 	{ 130, "MPQ8064" },
 	{ 138, "MSM8960AB" },
 	{ 139, "APQ8060AB" },
 	{ 140, "MSM8260AB" },
 	{ 141, "MSM8660AB" },
 	{ 178, "APQ8084" },
 	{ 184, "APQ8074" },
 	{ 185, "MSM8274" },
 	{ 186, "MSM8674" },
 	{ 194, "MSM8974PRO" },
 	{ 206, "MSM8916" },
 	{ 207, "MSM8994" },
 	{ 208, "APQ8074-AA" },
 	{ 209, "APQ8074-AB" },
 	{ 210, "APQ8074PRO" },
 	{ 211, "MSM8274-AA" },
 	{ 212, "MSM8274-AB" },
 	{ 213, "MSM8274PRO" },
 	{ 214, "MSM8674-AA" },
 	{ 215, "MSM8674-AB" },
 	{ 216, "MSM8674PRO" },
 	{ 217, "MSM8974-AA" },
 	{ 218, "MSM8974-AB" },
 	{ 233, "MSM8936" },
 	{ 239, "MSM8939" },
 	{ 240, "APQ8036" },
 	{ 241, "APQ8039" },
 	{ 246, "MSM8996" },
 	{ 247, "APQ8016" },
 	{ 248, "MSM8216" },
 	{ 249, "MSM8116" },
 	{ 250, "MSM8616" },
 	{ 251, "MSM8992" },
 	{ 253, "APQ8094" },
 	{ 291, "APQ8096" },
 	{ 305, "MSM8996SG" },
 	{ 310, "MSM8996AU" },
 	{ 311, "APQ8096AU" },
 	{ 312, "APQ8096SG" },
 	{ 318, "SDM630" },
 	{ 321, "SDM845" },
 	{ 341, "SDA845" },
 	{ 356, "SM8250" },
 	{ 402, "IPQ6018" },
 	{ 425, "SC7180" },
 };

 static const char *socinfo_machine(struct device *dev, unsigned int id)
 {
 	int idx;

 	for (idx = 0; idx < ARRAY_SIZE(soc_id); idx++) {
 		if (soc_id[idx].id == id)
 			return soc_id[idx].name;
 	}

 	return NULL;
 }

 #ifdef CONFIG_DEBUG_FS

 #define QCOM_OPEN(name, _func)						\
 static int qcom_open_##name(struct inode *inode, struct file *file)	\
 {									\
 	return single_open(file, _func, inode->i_private);		\
 }									\
 									\
 static const struct file_operations qcom_ ##name## _ops = {		\
 	.open = qcom_open_##name,					\
 	.read = seq_read,						\
 	.llseek = seq_lseek,						\
 	.release = single_release,					\
 }

 #define DEBUGFS_ADD(info, name)						\
 	debugfs_create_file(__stringify(name), 0400,			\
 			    qcom_socinfo->dbg_root,			\
 			    info, &qcom_ ##name## _ops)


 static int qcom_show_build_id(struct seq_file *seq, void *p)
 {
 	struct socinfo *socinfo = seq->private;

 	seq_printf(seq, "%s\n", socinfo->build_id);

 	return 0;
 }

 static int qcom_show_pmic_model(struct seq_file *seq, void *p)
 {
 	struct socinfo *socinfo = seq->private;
 	int model = SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_model));

 	if (model < 0)
 		return -EINVAL;

 	if (model < ARRAY_SIZE(pmic_models) && pmic_models[model])
 		seq_printf(seq, "%s\n", pmic_models[model]);
 	else
 		seq_printf(seq, "unknown (%d)\n", model);

 	return 0;
 }

 static int qcom_show_pmic_die_revision(struct seq_file *seq, void *p)
 {
 	struct socinfo *socinfo = seq->private;

 	seq_printf(seq, "%u.%u\n",
 		   SOCINFO_MAJOR(le32_to_cpu(socinfo->pmic_die_rev)),
 		   SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_die_rev)));

 	return 0;
 }

 static int qcom_show_chip_id(struct seq_file *seq, void *p)
 {
 	struct socinfo *socinfo = seq->private;

 	seq_printf(seq, "%s\n", socinfo->chip_id);

 	return 0;
 }

 QCOM_OPEN(build_id, qcom_show_build_id);
 QCOM_OPEN(pmic_model, qcom_show_pmic_model);
 QCOM_OPEN(pmic_die_rev, qcom_show_pmic_die_revision);
 QCOM_OPEN(chip_id, qcom_show_chip_id);

 #define DEFINE_IMAGE_OPS(type)					\
 static int show_image_##type(struct seq_file *seq, void *p)		  \
 {								  \
 	struct smem_image_version *image_version = seq->private;  \
 	seq_puts(seq, image_version->type);			  \
 	seq_putc(seq, '\n');					  \
 	return 0;						  \
 }								  \
 static int open_image_##type(struct inode *inode, struct file *file)	  \
 {									  \
 	return single_open(file, show_image_##type, inode->i_private); \
 }									  \
 									  \
 static const struct file_operations qcom_image_##type##_ops = {	  \
 	.open = open_image_##type,					  \
 	.read = seq_read,						  \
 	.llseek = seq_lseek,						  \
 	.release = single_release,					  \
 }

 DEFINE_IMAGE_OPS(name);
 DEFINE_IMAGE_OPS(variant);
 DEFINE_IMAGE_OPS(oem);

 static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 				 struct socinfo *info)
 {
 	struct smem_image_version *versions;
 	struct dentry *dentry;
 	size_t size;
 	int i;

 	qcom_socinfo->dbg_root = debugfs_create_dir("qcom_socinfo", NULL);

 	qcom_socinfo->info.fmt = __le32_to_cpu(info->fmt);

 	debugfs_create_x32("info_fmt", 0400, qcom_socinfo->dbg_root,
 			   &qcom_socinfo->info.fmt);

 	switch (qcom_socinfo->info.fmt) {
 	case SOCINFO_VERSION(0, 15):
 		qcom_socinfo->info.nmodem_supported = __le32_to_cpu(info->nmodem_supported);

 		debugfs_create_u32("nmodem_supported", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.nmodem_supported);
 		fallthrough;
 	case SOCINFO_VERSION(0, 14):
 		qcom_socinfo->info.num_clusters = __le32_to_cpu(info->num_clusters);
 		qcom_socinfo->info.ncluster_array_offset = __le32_to_cpu(info->ncluster_array_offset);
 		qcom_socinfo->info.num_defective_parts = __le32_to_cpu(info->num_defective_parts);
 		qcom_socinfo->info.ndefective_parts_array_offset = __le32_to_cpu(info->ndefective_parts_array_offset);

 		debugfs_create_u32("num_clusters", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.num_clusters);
 		debugfs_create_u32("ncluster_array_offset", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.ncluster_array_offset);
 		debugfs_create_u32("num_defective_parts", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.num_defective_parts);
 		debugfs_create_u32("ndefective_parts_array_offset", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.ndefective_parts_array_offset);
 		fallthrough;
 	case SOCINFO_VERSION(0, 13):
 		qcom_socinfo->info.nproduct_id = __le32_to_cpu(info->nproduct_id);

 		debugfs_create_u32("nproduct_id", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.nproduct_id);
 		DEBUGFS_ADD(info, chip_id);
 		fallthrough;
 	case SOCINFO_VERSION(0, 12):
 		qcom_socinfo->info.chip_family =
 			__le32_to_cpu(info->chip_family);
 		qcom_socinfo->info.raw_device_family =
 			__le32_to_cpu(info->raw_device_family);
 		qcom_socinfo->info.raw_device_num =
 			__le32_to_cpu(info->raw_device_num);

 		debugfs_create_x32("chip_family", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.chip_family);
 		debugfs_create_x32("raw_device_family", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.raw_device_family);
 		debugfs_create_x32("raw_device_number", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.raw_device_num);
 		fallthrough;
 	case SOCINFO_VERSION(0, 11):
 	case SOCINFO_VERSION(0, 10):
 	case SOCINFO_VERSION(0, 9):
 		qcom_socinfo->info.foundry_id = __le32_to_cpu(info->foundry_id);

 		debugfs_create_u32("foundry_id", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.foundry_id);
 		fallthrough;
 	case SOCINFO_VERSION(0, 8):
 	case SOCINFO_VERSION(0, 7):
 		DEBUGFS_ADD(info, pmic_model);
 		DEBUGFS_ADD(info, pmic_die_rev);
 		fallthrough;
 	case SOCINFO_VERSION(0, 6):
 		qcom_socinfo->info.hw_plat_subtype =
 			__le32_to_cpu(info->hw_plat_subtype);

 		debugfs_create_u32("hardware_platform_subtype", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.hw_plat_subtype);
 		fallthrough;
 	case SOCINFO_VERSION(0, 5):
 		qcom_socinfo->info.accessory_chip =
 			__le32_to_cpu(info->accessory_chip);

 		debugfs_create_u32("accessory_chip", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.accessory_chip);
 		fallthrough;
 	case SOCINFO_VERSION(0, 4):
 		qcom_socinfo->info.plat_ver = __le32_to_cpu(info->plat_ver);

 		debugfs_create_u32("platform_version", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.plat_ver);
 		fallthrough;
 	case SOCINFO_VERSION(0, 3):
 		qcom_socinfo->info.hw_plat = __le32_to_cpu(info->hw_plat);

 		debugfs_create_u32("hardware_platform", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.hw_plat);
 		fallthrough;
 	case SOCINFO_VERSION(0, 2):
 		qcom_socinfo->info.raw_ver  = __le32_to_cpu(info->raw_ver);

 		debugfs_create_u32("raw_version", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.raw_ver);
 		fallthrough;
 	case SOCINFO_VERSION(0, 1):
 		DEBUGFS_ADD(info, build_id);
 		break;
 	}

 	versions = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_IMAGE_VERSION_TABLE,
 				 &size);

 	for (i = 0; i < ARRAY_SIZE(socinfo_image_names); i++) {
 		if (!socinfo_image_names[i])
 			continue;

 		dentry = debugfs_create_dir(socinfo_image_names[i],
 					    qcom_socinfo->dbg_root);
 		debugfs_create_file("name", 0400, dentry, &versions[i],
 				    &qcom_image_name_ops);
 		debugfs_create_file("variant", 0400, dentry, &versions[i],
 				    &qcom_image_variant_ops);
 		debugfs_create_file("oem", 0400, dentry, &versions[i],
 				    &qcom_image_oem_ops);
 	}
 }

 static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo)
 {
 	debugfs_remove_recursive(qcom_socinfo->dbg_root);
 }
 #else
 static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 				 struct socinfo *info)
 {
 }
 static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo) {  }
 #endif /* CONFIG_DEBUG_FS */

 static int qcom_socinfo_probe(struct platform_device *pdev)
 {
 	struct qcom_socinfo *qs;
 	struct socinfo *info;
 	size_t item_size;

 	info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
 			      &item_size);
 	if (IS_ERR(info)) {
 		dev_err(&pdev->dev, "Couldn't find socinfo\n");
 		return PTR_ERR(info);
 	}

 	qs = devm_kzalloc(&pdev->dev, sizeof(*qs), GFP_KERNEL);
 	if (!qs)
 		return -ENOMEM;

 	qs->attr.family = "Snapdragon";
 	qs->attr.machine = socinfo_machine(&pdev->dev,
 					   le32_to_cpu(info->id));
 	qs->attr.soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u",
 					 le32_to_cpu(info->id));
 	qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
 					   SOCINFO_MAJOR(le32_to_cpu(info->ver)),
 					   SOCINFO_MINOR(le32_to_cpu(info->ver)));
 	if (offsetof(struct socinfo, serial_num) <= item_size)
 		qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 							"%u",
 							le32_to_cpu(info->serial_num));

 	qs->soc_dev = soc_device_register(&qs->attr);
 	if (IS_ERR(qs->soc_dev))
 		return PTR_ERR(qs->soc_dev);

 	socinfo_debugfs_init(qs, info);

 	/* Feed the soc specific unique data into entropy pool */
 	add_device_randomness(info, item_size);

 	platform_set_drvdata(pdev, qs);

 	return 0;
 }

 static int qcom_socinfo_remove(struct platform_device *pdev)
 {
 	struct qcom_socinfo *qs = platform_get_drvdata(pdev);

 	soc_device_unregister(qs->soc_dev);

 	socinfo_debugfs_exit(qs);

 	return 0;
 }

 static struct platform_driver qcom_socinfo_driver = {
 	.probe = qcom_socinfo_probe,
 	.remove = qcom_socinfo_remove,
 	.driver  = {
 		.name = "qcom-socinfo",
 	},
 };

 module_platform_driver(qcom_socinfo_driver);

 MODULE_DESCRIPTION("Qualcomm SoCinfo driver");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:qcom-socinfo");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
	* Copyright (c) 2017-2019, Linaro Ltd.
	*/

	#include <linux/debugfs.h>
	#include <linux/err.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/random.h>
	#include <linux/slab.h>
	#include <linux/soc/qcom/smem.h>
	#include <linux/string.h>
	#include <linux/sys_soc.h>
	#include <linux/types.h>

	/*
	* SoC version type with major number in the upper 16 bits and minor
	* number in the lower 16 bits.
	*/
	#define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
	#define SOCINFO_MINOR(ver) ((ver) & 0xffff)
	#define SOCINFO_VERSION(maj, min) ((((maj) & 0xffff) << 16)\|((min) & 0xffff))

	#define SMEM_SOCINFO_BUILD_ID_LENGTH 32
	#define SMEM_SOCINFO_CHIP_ID_LENGTH 32

	/*
	* SMEM item id, used to acquire handles to respective
	* SMEM region.
	*/
	#define SMEM_HW_SW_BUILD_ID 137

	#ifdef CONFIG_DEBUG_FS
	#define SMEM_IMAGE_VERSION_BLOCKS_COUNT 32
	#define SMEM_IMAGE_VERSION_SIZE 4096
	#define SMEM_IMAGE_VERSION_NAME_SIZE 75
	#define SMEM_IMAGE_VERSION_VARIANT_SIZE 20
	#define SMEM_IMAGE_VERSION_OEM_SIZE 32

	/*
	* SMEM Image table indices
	*/
	#define SMEM_IMAGE_TABLE_BOOT_INDEX 0
	#define SMEM_IMAGE_TABLE_TZ_INDEX 1
	#define SMEM_IMAGE_TABLE_RPM_INDEX 3
	#define SMEM_IMAGE_TABLE_APPS_INDEX 10
	#define SMEM_IMAGE_TABLE_MPSS_INDEX 11
	#define SMEM_IMAGE_TABLE_ADSP_INDEX 12
	#define SMEM_IMAGE_TABLE_CNSS_INDEX 13
	#define SMEM_IMAGE_TABLE_VIDEO_INDEX 14
	#define SMEM_IMAGE_VERSION_TABLE 469

	/*
	* SMEM Image table names
	*/
	static const char *const socinfo_image_names[] = {
	[SMEM_IMAGE_TABLE_ADSP_INDEX] = "adsp",
	[SMEM_IMAGE_TABLE_APPS_INDEX] = "apps",
	[SMEM_IMAGE_TABLE_BOOT_INDEX] = "boot",
	[SMEM_IMAGE_TABLE_CNSS_INDEX] = "cnss",
	[SMEM_IMAGE_TABLE_MPSS_INDEX] = "mpss",
	[SMEM_IMAGE_TABLE_RPM_INDEX] = "rpm",
	[SMEM_IMAGE_TABLE_TZ_INDEX] = "tz",
	[SMEM_IMAGE_TABLE_VIDEO_INDEX] = "video",
	};

	static const char *const pmic_models[] = {
	[0] = "Unknown PMIC model",
	[9] = "PM8994",
	[11] = "PM8916",
	[13] = "PM8058",
	[14] = "PM8028",
	[15] = "PM8901",
	[16] = "PM8027",
	[17] = "ISL9519",
	[18] = "PM8921",
	[19] = "PM8018",
	[20] = "PM8015",
	[21] = "PM8014",
	[22] = "PM8821",
	[23] = "PM8038",
	[24] = "PM8922",
	[25] = "PM8917",
	};
	#endif /* CONFIG_DEBUG_FS */

	/* Socinfo SMEM item structure */
	struct socinfo {
	__le32 fmt;
	__le32 id;
	__le32 ver;
	char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
	/* Version 2 */
	__le32 raw_id;
	__le32 raw_ver;
	/* Version 3 */
	__le32 hw_plat;
	/* Version 4 */
	__le32 plat_ver;
	/* Version 5 */
	__le32 accessory_chip;
	/* Version 6 */
	__le32 hw_plat_subtype;
	/* Version 7 */
	__le32 pmic_model;
	__le32 pmic_die_rev;
	/* Version 8 */
	__le32 pmic_model_1;
	__le32 pmic_die_rev_1;
	__le32 pmic_model_2;
	__le32 pmic_die_rev_2;
	/* Version 9 */
	__le32 foundry_id;
	/* Version 10 */
	__le32 serial_num;
	/* Version 11 */
	__le32 num_pmics;
	__le32 pmic_array_offset;
	/* Version 12 */
	__le32 chip_family;
	__le32 raw_device_family;
	__le32 raw_device_num;
	/* Version 13 */
	__le32 nproduct_id;
	char chip_id[SMEM_SOCINFO_CHIP_ID_LENGTH];
	/* Version 14 */
	__le32 num_clusters;
	__le32 ncluster_array_offset;
	__le32 num_defective_parts;
	__le32 ndefective_parts_array_offset;
	/* Version 15 */
	__le32 nmodem_supported;
	};

	#ifdef CONFIG_DEBUG_FS
	struct socinfo_params {
	u32 raw_device_family;
	u32 hw_plat_subtype;
	u32 accessory_chip;
	u32 raw_device_num;
	u32 chip_family;
	u32 foundry_id;
	u32 plat_ver;
	u32 raw_ver;
	u32 hw_plat;
	u32 fmt;
	u32 nproduct_id;
	u32 num_clusters;
	u32 ncluster_array_offset;
	u32 num_defective_parts;
	u32 ndefective_parts_array_offset;
	u32 nmodem_supported;
	};

	struct smem_image_version {
	char name[SMEM_IMAGE_VERSION_NAME_SIZE];
	char variant[SMEM_IMAGE_VERSION_VARIANT_SIZE];
	char pad;
	char oem[SMEM_IMAGE_VERSION_OEM_SIZE];
	};
	#endif /* CONFIG_DEBUG_FS */

	struct qcom_socinfo {
	struct soc_device *soc_dev;
	struct soc_device_attribute attr;
	#ifdef CONFIG_DEBUG_FS
	struct dentry *dbg_root;
	struct socinfo_params info;
	#endif /* CONFIG_DEBUG_FS */
	};

	struct soc_id {
	unsigned int id;
	const char *name;
	};

	static const struct soc_id soc_id[] = {
	{ 87, "MSM8960" },
	{ 109, "APQ8064" },
	{ 122, "MSM8660A" },
	{ 123, "MSM8260A" },
	{ 124, "APQ8060A" },
	{ 126, "MSM8974" },
	{ 130, "MPQ8064" },
	{ 138, "MSM8960AB" },
	{ 139, "APQ8060AB" },
	{ 140, "MSM8260AB" },
	{ 141, "MSM8660AB" },
	{ 178, "APQ8084" },
	{ 184, "APQ8074" },
	{ 185, "MSM8274" },
	{ 186, "MSM8674" },
	{ 194, "MSM8974PRO" },
	{ 206, "MSM8916" },
	{ 207, "MSM8994" },
	{ 208, "APQ8074-AA" },
	{ 209, "APQ8074-AB" },
	{ 210, "APQ8074PRO" },
	{ 211, "MSM8274-AA" },
	{ 212, "MSM8274-AB" },
	{ 213, "MSM8274PRO" },
	{ 214, "MSM8674-AA" },
	{ 215, "MSM8674-AB" },
	{ 216, "MSM8674PRO" },
	{ 217, "MSM8974-AA" },
	{ 218, "MSM8974-AB" },
	{ 233, "MSM8936" },
	{ 239, "MSM8939" },
	{ 240, "APQ8036" },
	{ 241, "APQ8039" },
	{ 246, "MSM8996" },
	{ 247, "APQ8016" },
	{ 248, "MSM8216" },
	{ 249, "MSM8116" },
	{ 250, "MSM8616" },
	{ 251, "MSM8992" },
	{ 253, "APQ8094" },
	{ 291, "APQ8096" },
	{ 305, "MSM8996SG" },
	{ 310, "MSM8996AU" },
	{ 311, "APQ8096AU" },
	{ 312, "APQ8096SG" },
	{ 318, "SDM630" },
	{ 321, "SDM845" },
	{ 341, "SDA845" },
	{ 356, "SM8250" },
	{ 402, "IPQ6018" },
	{ 425, "SC7180" },
	};

	static const char socinfo_machine(struct device dev, unsigned int id)
	{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(soc_id); idx++) {
	if (soc_id[idx].id == id)
	return soc_id[idx].name;
	}

	return NULL;
	}

	#ifdef CONFIG_DEBUG_FS

	#define QCOM_OPEN(name, _func) \
	static int qcom_open_##name(struct inode inode, struct file file) \
	{ \
	return single_open(file, _func, inode->i_private); \
	} \
	\
	static const struct file_operations qcom_ ##name## _ops = { \
	.open = qcom_open_##name, \
	.read = seq_read, \
	.llseek = seq_lseek, \
	.release = single_release, \
	}

	#define DEBUGFS_ADD(info, name) \
	debugfs_create_file(__stringify(name), 0400, \
	qcom_socinfo->dbg_root, \
	info, &qcom_ ##name## _ops)


	static int qcom_show_build_id(struct seq_file seq, void p)
	{
	struct socinfo *socinfo = seq->private;

	seq_printf(seq, "%s\n", socinfo->build_id);

	return 0;
	}

	static int qcom_show_pmic_model(struct seq_file seq, void p)
	{
	struct socinfo *socinfo = seq->private;
	int model = SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_model));

	if (model < 0)
	return -EINVAL;

	if (model < ARRAY_SIZE(pmic_models) && pmic_models[model])
	seq_printf(seq, "%s\n", pmic_models[model]);
	else
	seq_printf(seq, "unknown (%d)\n", model);

	return 0;
	}

	static int qcom_show_pmic_die_revision(struct seq_file seq, void p)
	{
	struct socinfo *socinfo = seq->private;

	seq_printf(seq, "%u.%u\n",
	SOCINFO_MAJOR(le32_to_cpu(socinfo->pmic_die_rev)),
	SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_die_rev)));

	return 0;
	}

	static int qcom_show_chip_id(struct seq_file seq, void p)
	{
	struct socinfo *socinfo = seq->private;

	seq_printf(seq, "%s\n", socinfo->chip_id);

	return 0;
	}

	QCOM_OPEN(build_id, qcom_show_build_id);
	QCOM_OPEN(pmic_model, qcom_show_pmic_model);
	QCOM_OPEN(pmic_die_rev, qcom_show_pmic_die_revision);
	QCOM_OPEN(chip_id, qcom_show_chip_id);

	#define DEFINE_IMAGE_OPS(type) \
	static int show_image_##type(struct seq_file seq, void p) \
	{ \
	struct smem_image_version *image_version = seq->private; \
	seq_puts(seq, image_version->type); \
	seq_putc(seq, '\n'); \
	return 0; \
	} \
	static int open_image_##type(struct inode inode, struct file file) \
	{ \
	return single_open(file, show_image_##type, inode->i_private); \
	} \
	\
	static const struct file_operations qcom_image_##type##_ops = { \
	.open = open_image_##type, \
	.read = seq_read, \
	.llseek = seq_lseek, \
	.release = single_release, \
	}

	DEFINE_IMAGE_OPS(name);
	DEFINE_IMAGE_OPS(variant);
	DEFINE_IMAGE_OPS(oem);

	static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
	struct socinfo *info)
	{
	struct smem_image_version *versions;
	struct dentry *dentry;
	size_t size;
	int i;

	qcom_socinfo->dbg_root = debugfs_create_dir("qcom_socinfo", NULL);

	qcom_socinfo->info.fmt = __le32_to_cpu(info->fmt);

	debugfs_create_x32("info_fmt", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.fmt);

	switch (qcom_socinfo->info.fmt) {
	case SOCINFO_VERSION(0, 15):
	qcom_socinfo->info.nmodem_supported = __le32_to_cpu(info->nmodem_supported);

	debugfs_create_u32("nmodem_supported", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.nmodem_supported);
	fallthrough;
	case SOCINFO_VERSION(0, 14):
	qcom_socinfo->info.num_clusters = __le32_to_cpu(info->num_clusters);
	qcom_socinfo->info.ncluster_array_offset = __le32_to_cpu(info->ncluster_array_offset);
	qcom_socinfo->info.num_defective_parts = __le32_to_cpu(info->num_defective_parts);
	qcom_socinfo->info.ndefective_parts_array_offset = __le32_to_cpu(info->ndefective_parts_array_offset);

	debugfs_create_u32("num_clusters", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.num_clusters);
	debugfs_create_u32("ncluster_array_offset", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.ncluster_array_offset);
	debugfs_create_u32("num_defective_parts", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.num_defective_parts);
	debugfs_create_u32("ndefective_parts_array_offset", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.ndefective_parts_array_offset);
	fallthrough;
	case SOCINFO_VERSION(0, 13):
	qcom_socinfo->info.nproduct_id = __le32_to_cpu(info->nproduct_id);

	debugfs_create_u32("nproduct_id", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.nproduct_id);
	DEBUGFS_ADD(info, chip_id);
	fallthrough;
	case SOCINFO_VERSION(0, 12):
	qcom_socinfo->info.chip_family =
	__le32_to_cpu(info->chip_family);
	qcom_socinfo->info.raw_device_family =
	__le32_to_cpu(info->raw_device_family);
	qcom_socinfo->info.raw_device_num =
	__le32_to_cpu(info->raw_device_num);

	debugfs_create_x32("chip_family", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.chip_family);
	debugfs_create_x32("raw_device_family", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.raw_device_family);
	debugfs_create_x32("raw_device_number", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.raw_device_num);
	fallthrough;
	case SOCINFO_VERSION(0, 11):
	case SOCINFO_VERSION(0, 10):
	case SOCINFO_VERSION(0, 9):
	qcom_socinfo->info.foundry_id = __le32_to_cpu(info->foundry_id);

	debugfs_create_u32("foundry_id", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.foundry_id);
	fallthrough;
	case SOCINFO_VERSION(0, 8):
	case SOCINFO_VERSION(0, 7):
	DEBUGFS_ADD(info, pmic_model);
	DEBUGFS_ADD(info, pmic_die_rev);
	fallthrough;
	case SOCINFO_VERSION(0, 6):
	qcom_socinfo->info.hw_plat_subtype =
	__le32_to_cpu(info->hw_plat_subtype);

	debugfs_create_u32("hardware_platform_subtype", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.hw_plat_subtype);
	fallthrough;
	case SOCINFO_VERSION(0, 5):
	qcom_socinfo->info.accessory_chip =
	__le32_to_cpu(info->accessory_chip);

	debugfs_create_u32("accessory_chip", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.accessory_chip);
	fallthrough;
	case SOCINFO_VERSION(0, 4):
	qcom_socinfo->info.plat_ver = __le32_to_cpu(info->plat_ver);

	debugfs_create_u32("platform_version", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.plat_ver);
	fallthrough;
	case SOCINFO_VERSION(0, 3):
	qcom_socinfo->info.hw_plat = __le32_to_cpu(info->hw_plat);

	debugfs_create_u32("hardware_platform", 0400,
	qcom_socinfo->dbg_root,
	&qcom_socinfo->info.hw_plat);
	fallthrough;
	case SOCINFO_VERSION(0, 2):
	qcom_socinfo->info.raw_ver = __le32_to_cpu(info->raw_ver);

	debugfs_create_u32("raw_version", 0400, qcom_socinfo->dbg_root,
	&qcom_socinfo->info.raw_ver);
	fallthrough;
	case SOCINFO_VERSION(0, 1):
	DEBUGFS_ADD(info, build_id);
	break;
	}

	versions = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_IMAGE_VERSION_TABLE,
	&size);

	for (i = 0; i < ARRAY_SIZE(socinfo_image_names); i++) {
	if (!socinfo_image_names[i])
	continue;

	dentry = debugfs_create_dir(socinfo_image_names[i],
	qcom_socinfo->dbg_root);
	debugfs_create_file("name", 0400, dentry, &versions[i],
	&qcom_image_name_ops);
	debugfs_create_file("variant", 0400, dentry, &versions[i],
	&qcom_image_variant_ops);
	debugfs_create_file("oem", 0400, dentry, &versions[i],
	&qcom_image_oem_ops);
	}
	}

	static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo)
	{
	debugfs_remove_recursive(qcom_socinfo->dbg_root);
	}
	#else
	static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
	struct socinfo *info)
	{
	}
	static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo) { }
	#endif /* CONFIG_DEBUG_FS */

	static int qcom_socinfo_probe(struct platform_device *pdev)
	{
	struct qcom_socinfo *qs;
	struct socinfo *info;
	size_t item_size;

	info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
	&item_size);
	if (IS_ERR(info)) {
	dev_err(&pdev->dev, "Couldn't find socinfo\n");
	return PTR_ERR(info);
	}

	qs = devm_kzalloc(&pdev->dev, sizeof(*qs), GFP_KERNEL);
	if (!qs)
	return -ENOMEM;

	qs->attr.family = "Snapdragon";
	qs->attr.machine = socinfo_machine(&pdev->dev,
	le32_to_cpu(info->id));
	qs->attr.soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u",
	le32_to_cpu(info->id));
	qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
	SOCINFO_MAJOR(le32_to_cpu(info->ver)),
	SOCINFO_MINOR(le32_to_cpu(info->ver)));
	if (offsetof(struct socinfo, serial_num) <= item_size)
	qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
	"%u",
	le32_to_cpu(info->serial_num));

	qs->soc_dev = soc_device_register(&qs->attr);
	if (IS_ERR(qs->soc_dev))
	return PTR_ERR(qs->soc_dev);

	socinfo_debugfs_init(qs, info);

	/* Feed the soc specific unique data into entropy pool */
	add_device_randomness(info, item_size);

	platform_set_drvdata(pdev, qs);

	return 0;
	}

	static int qcom_socinfo_remove(struct platform_device *pdev)
	{
	struct qcom_socinfo *qs = platform_get_drvdata(pdev);

	soc_device_unregister(qs->soc_dev);

	socinfo_debugfs_exit(qs);

	return 0;
	}

	static struct platform_driver qcom_socinfo_driver = {
	.probe = qcom_socinfo_probe,
	.remove = qcom_socinfo_remove,
	.driver = {
	.name = "qcom-socinfo",
	},
	};

	module_platform_driver(qcom_socinfo_driver);

	MODULE_DESCRIPTION("Qualcomm SoCinfo driver");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("platform:qcom-socinfo");