[PATCH v6 0/5] soc: qcom: Add SoC info driver

[PATCH v6 0/5] soc: qcom: Add SoC info driver

[Vaishali Thakkar]

This patchset adds SoC info driver which can provide information
such as Chip ID, Chip family and serial number about Qualcomm SoCs
to user space via sysfs. Furthermore, it allows userspace to get
information about custom attributes and various image version
information via debugfs.

The patchset cleanly applies on top of v5.2-rc7.

Changes since v1:
        - Align ifdefs to left, remove unnecessary debugfs dir
          creation check and fix function signatures in patch 3
        - Fix comment for teh case when serial number is not
          available in patch 1

Changes since v2:
        - Reorder patches [patch five -> patch two]

Changes since v3:
        - Add reviewed-bys from Greg
        - Fix build warning when debugfs is disabled
        - Remove extra checks for dir creations in patch 5

Changes since v4:
	- Added Reviewed-bys in multiple patches
	- Bunch of nitpick fixes in patch 3
	- Major refactoring for using core debugfs functions and
	  eliminating duplicate code in patch 4 and 5 [detailed info
	  can be found under --- in each patch]

Changes since v5:
	- No code changes, fix diff.context setting for formatting
	  patches. Version 4 was adding context at the bottom of
	  the file with 'git am'. 

Vaishali Thakkar (5):
  base: soc: Add serial_number attribute to soc
  base: soc: Export soc_device_register/unregister APIs
  soc: qcom: Add socinfo driver
  soc: qcom: socinfo: Expose custom attributes
  soc: qcom: socinfo: Expose image information

 Documentation/ABI/testing/sysfs-devices-soc |   7 +
 drivers/base/soc.c                          |   9 +
 drivers/soc/qcom/Kconfig                    |   8 +
 drivers/soc/qcom/Makefile                   |   1 +
 drivers/soc/qcom/smem.c                     |   9 +
 drivers/soc/qcom/socinfo.c                  | 468 ++++++++++++++++++++
 include/linux/sys_soc.h                     |   1 +
 7 files changed, 503 insertions(+)
 create mode 100644 drivers/soc/qcom/socinfo.c

-- 
2.17.1

[PATCH v6 1/5] base: soc: Add serial_number attribute to soc

[Vaishali Thakkar]

From: Bjorn Andersson <bjorn.andersson@linaro.org>

Add new attribute named "serial_number" as a standard interface for
user space to acquire the serial number of the device.

For ST-Ericsson SoCs this is exposed by the cryptically named "soc_id"
attribute, but this provides a human readable standardized name for this
property.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
Changes since v5:
	- No code changes, fix diff.context setting for formatting
          patches. Version 5 was adding context at the bottom of
          the file with 'git am'.
Changes since v4:
	- Add Stephen's reviewed-by
Changes since v3:
        - Add Greg's Reviewed-by
Changes since v2:
        - None
Changes since v1:
	- Make comment more clear for the case when serial
	  number is not available
---
 Documentation/ABI/testing/sysfs-devices-soc | 7 +++++++
 drivers/base/soc.c                          | 7 +++++++
 include/linux/sys_soc.h                     | 1 +
 3 files changed, 15 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-devices-soc b/Documentation/ABI/testing/sysfs-devices-soc
index 6d9cc253f2b2..ba3a3fac0ee1 100644
--- a/Documentation/ABI/testing/sysfs-devices-soc
+++ b/Documentation/ABI/testing/sysfs-devices-soc
@@ -26,6 +26,13 @@ Description:
 		Read-only attribute common to all SoCs. Contains SoC family name
 		(e.g. DB8500).
 
+What:		/sys/devices/socX/serial_number
+Date:		January 2019
+contact:	Bjorn Andersson <bjorn.andersson@linaro.org>
+Description:
+		Read-only attribute supported by most SoCs. Contains the SoC's
+		serial number, if available.
+
 What:		/sys/devices/socX/soc_id
 Date:		January 2012
 contact:	Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 10b280f30217..b0933b9fe67f 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -33,6 +33,7 @@ static struct bus_type soc_bus_type = {
 
 static DEVICE_ATTR(machine,  S_IRUGO, soc_info_get,  NULL);
 static DEVICE_ATTR(family,   S_IRUGO, soc_info_get,  NULL);
+static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get,  NULL);
 static DEVICE_ATTR(soc_id,   S_IRUGO, soc_info_get,  NULL);
 static DEVICE_ATTR(revision, S_IRUGO, soc_info_get,  NULL);
 
@@ -57,6 +58,9 @@ static umode_t soc_attribute_mode(struct kobject *kobj,
 	if ((attr == &dev_attr_revision.attr)
 	    && (soc_dev->attr->revision != NULL))
 		return attr->mode;
+	if ((attr == &dev_attr_serial_number.attr)
+	    && (soc_dev->attr->serial_number != NULL))
+		return attr->mode;
 	if ((attr == &dev_attr_soc_id.attr)
 	    && (soc_dev->attr->soc_id != NULL))
 		return attr->mode;
@@ -77,6 +81,8 @@ static ssize_t soc_info_get(struct device *dev,
 		return sprintf(buf, "%s\n", soc_dev->attr->family);
 	if (attr == &dev_attr_revision)
 		return sprintf(buf, "%s\n", soc_dev->attr->revision);
+	if (attr == &dev_attr_serial_number)
+		return sprintf(buf, "%s\n", soc_dev->attr->serial_number);
 	if (attr == &dev_attr_soc_id)
 		return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
 
@@ -87,6 +93,7 @@ static ssize_t soc_info_get(struct device *dev,
 static struct attribute *soc_attr[] = {
 	&dev_attr_machine.attr,
 	&dev_attr_family.attr,
+	&dev_attr_serial_number.attr,
 	&dev_attr_soc_id.attr,
 	&dev_attr_revision.attr,
 	NULL,
diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h
index b7c70c3e953f..48ceea867dd6 100644
--- a/include/linux/sys_soc.h
+++ b/include/linux/sys_soc.h
@@ -12,6 +12,7 @@ struct soc_device_attribute {
 	const char *machine;
 	const char *family;
 	const char *revision;
+	const char *serial_number;
 	const char *soc_id;
 	const void *data;
 };
-- 
2.17.1

[PATCH v6 2/5] base: soc: Export soc_device_register/unregister APIs

[Vaishali Thakkar]

From: Vinod Koul <vkoul@kernel.org>

Qcom Socinfo driver can be built as a module, so
export these two APIs.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
Changes since v5:
        - No code changes, fix diff.context setting for formatting
          patches. Version 5 was adding context at the bottom of
          the file with 'git am'.
Changes since v4:
	- Add Bjorn and Stephen's Reviewed-by
Changes since v3:
        - Add Greg's Reviewed-by
Changes since v2:
        - None
Changes since v1:
        - Make comment more clear for the case when serial
          number is not available
---
 drivers/base/soc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index b0933b9fe67f..7c0c5ca5953d 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -164,6 +164,7 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
 out1:
 	return ERR_PTR(ret);
 }
+EXPORT_SYMBOL_GPL(soc_device_register);
 
 /* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
 void soc_device_unregister(struct soc_device *soc_dev)
@@ -173,6 +174,7 @@ void soc_device_unregister(struct soc_device *soc_dev)
 	device_unregister(&soc_dev->dev);
 	early_soc_dev_attr = NULL;
 }
+EXPORT_SYMBOL_GPL(soc_device_unregister);
 
 static int __init soc_bus_register(void)
 {
-- 
2.17.1

[PATCH v6 3/5] soc: qcom: Add socinfo driver

[Vaishali Thakkar]

From: Imran Khan <kimran@codeaurora.org>

The Qualcomm socinfo driver exposes information about the SoC, its
version and its serial number to user space.

Signed-off-by: Imran Khan <kimran@codeaurora.org>
[Bjorn: Extract code to platform_driver, split patch in multiple]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[Vaishali: Simplify declarations, introduce qcom_socinfo struct, Fix
           memory leak, Remove extra code and Misc code refactoring]
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
---
Changes since v5:
	-No code changes, fix diff.context setting for formatting
         patches. Version 5 was adding context at the bottom of
         the file with 'git am'.
Changes since v4:
	- Return PTR_ERR in qcom_socinfo_probe instead of error value
	- Return PTR_ERR in smem probe to print proper error message
	  when we fail to register the socinfo device
	- Use dev_dbg instead of dev_err in qcom_smem_probe
	- Use offset_of for exposing the value of serial_number
	- Unregister the platform device in smem remove function
	- Drop error message in socinfo_machine
	- Misc: Add spaces between brackets and strings/numbers in
	        soc_of_id, item ids->item id, socinfo->SoCinfo,
		soc_of_id->soc_id
Changes since v3:
        - None
Changes since v2:
        - Fix typo in the work log under signed off by s
Changes since v1:
        - None
---
 drivers/soc/qcom/Kconfig   |   8 ++
 drivers/soc/qcom/Makefile  |   1 +
 drivers/soc/qcom/smem.c    |   9 ++
 drivers/soc/qcom/socinfo.c | 194 +++++++++++++++++++++++++++++++++++++
 4 files changed, 212 insertions(+)
 create mode 100644 drivers/soc/qcom/socinfo.c

diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index a6d1bfb17279..661e47acc354 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -175,6 +175,14 @@ config QCOM_SMSM
 	  Say yes here to support the Qualcomm Shared Memory State Machine.
 	  The state machine is represented by bits in shared memory.
 
+config QCOM_SOCINFO
+	tristate "Qualcomm socinfo driver"
+	depends on QCOM_SMEM
+	select SOC_BUS
+	help
+	 Say yes here to support the Qualcomm socinfo driver, providing
+	 information about the SoC to user space.
+
 config QCOM_WCNSS_CTRL
 	tristate "Qualcomm WCNSS control driver"
 	depends on ARCH_QCOM || COMPILE_TEST
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index eeb088beb15f..162788701a77 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_QCOM_SMEM) +=	smem.o
 obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
 obj-$(CONFIG_QCOM_SMP2P)	+= smp2p.o
 obj-$(CONFIG_QCOM_SMSM)	+= smsm.o
+obj-$(CONFIG_QCOM_SOCINFO)	+= socinfo.o
 obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
 obj-$(CONFIG_QCOM_APR) += apr.o
 obj-$(CONFIG_QCOM_LLCC) += llcc-slice.o
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index f27c00d82ae4..0caf67e2f037 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -268,6 +268,7 @@ struct qcom_smem {
 	struct smem_partition_header *partitions[SMEM_HOST_COUNT];
 	size_t cacheline[SMEM_HOST_COUNT];
 	u32 item_count;
+	struct platform_device *socinfo;
 
 	unsigned num_regions;
 	struct smem_region regions[];
@@ -963,11 +964,19 @@ static int qcom_smem_probe(struct platform_device *pdev)
 
 	__smem = smem;
 
+	smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",
+						      PLATFORM_DEVID_NONE, NULL,
+						      0);
+	if (IS_ERR(smem->socinfo))
+		dev_dbg(&pdev->dev, "failed to register socinfo device\n");
+
 	return 0;
 }
 
 static int qcom_smem_remove(struct platform_device *pdev)
 {
+	platform_device_unregister(__smem->socinfo);
+
 	hwspin_lock_free(__smem->hwlock);
 	__smem = NULL;
 
diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
new file mode 100644
index 000000000000..1b9eb44df7fe
--- /dev/null
+++ b/drivers/soc/qcom/socinfo.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2019, Linaro Ltd.
+ */
+
+#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 SMEM_SOCINFO_BUILD_ID_LENGTH           32
+
+/*
+ * SMEM item id, used to acquire handles to respective
+ * SMEM region.
+ */
+#define SMEM_HW_SW_BUILD_ID            137
+
+/* 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;
+};
+
+struct qcom_socinfo {
+	struct soc_device *soc_dev;
+	struct soc_device_attribute attr;
+};
+
+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" },
+	{ 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" },
+	{ 246, "MSM8996" },
+	{ 247, "APQ8016" },
+	{ 248, "MSM8216" },
+	{ 249, "MSM8116" },
+	{ 250, "MSM8616" },
+	{ 291, "APQ8096" },
+	{ 305, "MSM8996SG" },
+	{ 310, "MSM8996AU" },
+	{ 311, "APQ8096AU" },
+	{ 312, "APQ8096SG" },
+};
+
+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;
+}
+
+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.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);
+
+	/* Feed the soc specific unique data into entropy pool */
+	add_device_randomness(info, item_size);
+
+	platform_set_drvdata(pdev, qs->soc_dev);
+
+	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);
+
+	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");
-- 
2.17.1

[PATCH v6 4/5] soc: qcom: socinfo: Expose custom attributes

[Vaishali Thakkar]

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

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
---
Changes since v5:
	- No code changes, fix my diff.context setting for formatting
          patches. Version 5 was adding context at the bottom of
          the file with 'git am'.
Changes since v4:
	- Introduce socinfo_params and use create_debugfs_{u32,x32}
	  instead of driver specific macros
	- Remove some unnecessary separate functions
	  [qcom_show_{platform_subtype,accessory_chip}] and use
	  debugfs core functions to expose their values
	- Use switch to expose custom attributes based on the
	  firmware version
	- Misc: Drop unnecessory comments, pmic_model->pmic_models,
		don't pass socinfo pointer in qcom_socinfo
	- Note: I didn't introduce any new debugfs core functions
	        for printing string values because it wasn't
		possible to cover both cases of string arrays in this
		file - pmic_model and build_id by introducing a single
		function. Morever, I still needed QCOM_OPEN and DEBUGFS_ADD
		to cover the case of pmic_die_rev so introducing the
		'debugfs create string array function' wasn't completely
		eliminating extra macro code. So, I'm just using the
		above mentioned macros to print string array values for
		now. Feel free to on this matter. Thanks!
Changes since v3:
	- Fix compilation error in function signatures when
          debugfs is disabled
Changes since v2:
	- None
Changes since v1:
	- Remove unnecessary debugfs dir creation check
        - Align ifdefs to left
        - Fix function signatures for debugfs init/exit
---
 drivers/soc/qcom/socinfo.c | 190 +++++++++++++++++++++++++++++++++++++
 1 file changed, 190 insertions(+)

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index 1b9eb44df7fe..6a4795433d57 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -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;
 }
 
-- 
2.17.1

[PATCH v6 5/5] soc: qcom: socinfo: Expose image information

[Vaishali Thakkar]

The socinfo driver provides information about version of the various
images loaded in the system. Expose this to user space for debugging
purpose.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
---
Changes since v5:
	- No code changes, fix diff.context setting for formatting
          patches. Version 5 was adding context at the bottom of
          the file with 'git am'.
Changes since v4:
	- Reduce number of duplicate image macros and functions
	- Introduce array for image info debugfs entries and use it
	  instead of open coding
Changes since v3:
        - Remove extra debugfs directory creation checks
Changes since v2:
        - None
Changes since v1:
        - None
---
 drivers/soc/qcom/socinfo.c | 84 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index 6a4795433d57..855353bed19e 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -32,6 +32,39 @@
 #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",
@@ -103,6 +136,13 @@ struct socinfo_params {
 	u32 hw_plat;
 	u32 fmt;
 };
+
+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 {
@@ -230,10 +270,37 @@ 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);
 
+#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_puts(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);
 
@@ -302,6 +369,23 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 		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)
-- 
2.17.1

Re: [PATCH v6 1/5] base: soc: Add serial_number attribute to soc

[Vinod Koul]

On 24-07-19, 04:05, Vaishali Thakkar wrote:
> From: Bjorn Andersson <bjorn.andersson@linaro.org>
> 
> Add new attribute named "serial_number" as a standard interface for
> user space to acquire the serial number of the device.
> 
> For ST-Ericsson SoCs this is exposed by the cryptically named "soc_id"
> attribute, but this provides a human readable standardized name for this
> property.

Reviewed-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod

Re: [PATCH v6 3/5] soc: qcom: Add socinfo driver

[Vinod Koul]

On 24-07-19, 04:05, Vaishali Thakkar wrote:
> From: Imran Khan <kimran@codeaurora.org>
> 
> The Qualcomm socinfo driver exposes information about the SoC, its
> version and its serial number to user space.

Reviewed-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod

Re: [PATCH v6 4/5] soc: qcom: socinfo: Expose custom attributes

[Vinod Koul]

On 24-07-19, 04:05, Vaishali Thakkar wrote:
> The Qualcomm socinfo provides a number of additional attributes,
> add these to the socinfo driver and expose them via debugfs
> functionality.

Reviewed-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod

Re: [PATCH v6 5/5] soc: qcom: socinfo: Expose image information

[Vinod Koul]

On 24-07-19, 04:05, Vaishali Thakkar wrote:
> The socinfo driver provides information about version of the various
> images loaded in the system. Expose this to user space for debugging
> purpose.

Reviewed-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod

Re: [PATCH v6 0/5] soc: qcom: Add SoC info driver

[Vinod Koul]

On 24-07-19, 04:05, Vaishali Thakkar wrote:
> This patchset adds SoC info driver which can provide information
> such as Chip ID, Chip family and serial number about Qualcomm SoCs
> to user space via sysfs. Furthermore, it allows userspace to get
> information about custom attributes and various image version
> information via debugfs.
> 
> The patchset cleanly applies on top of v5.2-rc7.

And on v5.3-rc1 :) and I have tested this on db845c, seems to work fine
for me

Tested-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod