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Commit 9c84c1e7 authored by Vaishali Thakkar's avatar Vaishali Thakkar Committed by Bjorn Andersson
Browse files

soc: qcom: socinfo: Expose custom attributes 



The Qualcomm socinfo provides a number of additional attributes,
add these to the socinfo driver and expose them via debugfs
functionality.

Tested-by: default avatarVinod Koul <vkoul@kernel.org>
Reviewed-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarVaishali Thakkar <vaishali.thakkar@linaro.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent efb448d0

drivers/soc/qcom/socinfo.c

+190 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 * Copyright (c) 2017-2019, Linaro Ltd.

 */



#include <linux/debugfs.h>

#include <linux/err.h>

#include <linux/module.h>

#include <linux/platform_device.h>
@@ -20,6 +21,7 @@ 
 */

#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
@@ -29,6 +31,27 @@ 
 */

#define SMEM_HW_SW_BUILD_ID            137



#ifdef CONFIG_DEBUG_FS

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;
@@ -67,9 +90,28 @@ struct socinfo { 
	__le32 raw_device_num;

};



#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;

};

#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 {
@@ -130,6 +172,150 @@ static const char *socinfo_machine(struct device *dev, unsigned int id) 
	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;



	seq_printf(seq, "%s\n", pmic_models[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;

}



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);



static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,

				 struct socinfo *info)

{

	size_t size;



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



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



	switch (qcom_socinfo->info.fmt) {

	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);

	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);

	case SOCINFO_VERSION(0, 8):

	case SOCINFO_VERSION(0, 7):

		DEBUGFS_ADD(info, pmic_model);

		DEBUGFS_ADD(info, pmic_die_rev);

	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);

	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);

	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);

	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);

	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);

	case SOCINFO_VERSION(0, 1):

		DEBUGFS_ADD(info, build_id);

		break;

	}

}



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;
@@ -162,6 +348,8 @@ static int qcom_socinfo_probe(struct platform_device *pdev) 
	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);
@@ -176,6 +364,8 @@ static int qcom_socinfo_remove(struct platform_device *pdev) 


	soc_device_unregister(qs->soc_dev);



	socinfo_debugfs_exit(qs);



	return 0;

}