linux-kernel - [PATCH 1/2] driver core:add device's platform

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <b03b374bc3adad275893e2ad60d4bf5a0ad358e3.1746662386.git.zhouzongmin@kylinos.cn>
Date: Thu,  8 May 2025 17:11:47 +0800
From: Zongmin Zhou <min_halo@....com>
To: gregkh@...uxfoundation.org,
	rafael@...nel.org,
	dakr@...nel.org,
	markgross@...nel.org,
	arnd@...db.de,
	eric.piel@...mplin-utc.net,
	valentina.manea.m@...il.com,
	shuah@...nel.org,
	i@...ithal.me
Cc: linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Zongmin Zhou <zhouzongmin@...inos.cn>
Subject: [PATCH 1/2] driver core:add device's platform_data set for faux device

From: Zongmin Zhou <zhouzongmin@...inos.cn>

Most drivers based on platform bus may have specific data
for the device.And will get this specific data to use
after device added.
So keep the setting for device's platform_data is necessary
for converting platform device to faux device.

Signed-off-by: Zongmin Zhou <zhouzongmin@...inos.cn>
---
 drivers/base/faux.c                | 9 +++++++--
 drivers/char/tlclk.c               | 2 +-
 drivers/misc/lis3lv02d/lis3lv02d.c | 2 +-
 include/linux/device/faux.h        | 3 ++-
 4 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/base/faux.c b/drivers/base/faux.c
index 407c1d1aad50..42ec843235cb 100644
--- a/drivers/base/faux.c
+++ b/drivers/base/faux.c
@@ -94,6 +94,8 @@ static void faux_device_release(struct device *dev)
  *		into, can be NULL.
  * @groups:	The set of sysfs attributes that will be created for this
  *		device when it is registered with the driver core.
+ * @plat_data:	The specific data that want to associated with this new device,
+ * 		can be NULL.Just call 'dev_get_platdata()' to get the data.
  *
  * Create a new faux device and register it in the driver core properly.
  * If present, callbacks in @faux_ops will be called with the device that
@@ -113,7 +115,8 @@ static void faux_device_release(struct device *dev)
 struct faux_device *faux_device_create_with_groups(const char *name,
 						   struct device *parent,
 						   const struct faux_device_ops *faux_ops,
-						   const struct attribute_group **groups)
+						   const struct attribute_group **groups,
+						   void *plat_data)
 {
 	struct faux_object *faux_obj;
 	struct faux_device *faux_dev;
@@ -141,6 +144,8 @@ struct faux_device *faux_device_create_with_groups(const char *name,
 	dev->groups = groups;
 	dev_set_name(dev, "%s", name);
 
+	dev->platform_data = plat_data;
+
 	ret = device_add(dev);
 	if (ret) {
 		pr_err("%s: device_add for faux device '%s' failed with %d\n",
@@ -191,7 +196,7 @@ struct faux_device *faux_device_create(const char *name,
 				       struct device *parent,
 				       const struct faux_device_ops *faux_ops)
 {
-	return faux_device_create_with_groups(name, parent, faux_ops, NULL);
+	return faux_device_create_with_groups(name, parent, faux_ops, NULL, NULL);
 }
 EXPORT_SYMBOL_GPL(faux_device_create);
 
diff --git a/drivers/char/tlclk.c b/drivers/char/tlclk.c
index b381ea7e85d2..9334880dec67 100644
--- a/drivers/char/tlclk.c
+++ b/drivers/char/tlclk.c
@@ -813,7 +813,7 @@ static int __init tlclk_init(void)
 		goto out3;
 	}
 
-	tlclk_device = faux_device_create_with_groups("telco_clock", NULL, NULL, tlclk_groups);
+	tlclk_device = faux_device_create_with_groups("telco_clock", NULL, NULL, tlclk_groups, NULL);
 	if (!tlclk_device) {
 		ret = -ENODEV;
 		goto out4;
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c
index 6957091ab6de..e63cb353f425 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d.c
+++ b/drivers/misc/lis3lv02d/lis3lv02d.c
@@ -864,7 +864,7 @@ ATTRIBUTE_GROUPS(lis3lv02d);
 
 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
 {
-	lis3->fdev = faux_device_create_with_groups(DRIVER_NAME, NULL, NULL, lis3lv02d_groups);
+	lis3->fdev = faux_device_create_with_groups(DRIVER_NAME, NULL, NULL, lis3lv02d_groups, NULL);
 	if (!lis3->fdev)
 		return -ENODEV;
 
diff --git a/include/linux/device/faux.h b/include/linux/device/faux.h
index 9f43c0e46aa4..36532288a09a 100644
--- a/include/linux/device/faux.h
+++ b/include/linux/device/faux.h
@@ -53,7 +53,8 @@ struct faux_device *faux_device_create(const char *name,
 struct faux_device *faux_device_create_with_groups(const char *name,
 						   struct device *parent,
 						   const struct faux_device_ops *faux_ops,
-						   const struct attribute_group **groups);
+						   const struct attribute_group **groups,
+						   void *plat_data);
 void faux_device_destroy(struct faux_device *faux_dev);
 
 static inline void *faux_device_get_drvdata(const struct faux_device *faux_dev)
-- 
2.25.1