linux-kernel - [PATCH v2 07/16] rpmsg: char: clean up rpmsg class

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Date:   Tue, 22 Dec 2020 11:57:17 +0100
From:   Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Andy Gross <agross@...nel.org>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-msm@...r.kernel.org>, <arnaud.pouliquen@...s.st.com>
Subject: [PATCH v2 07/16] rpmsg: char: clean up rpmsg class

Suppress the management of the rpmsg class as attribute. It is already
handled in /sys/bus rpmsg as specified in
documentation/ABI/testing/sysfs-bus-rpmsg.
This patch prepares the migration of the control device in rpmsg_ctrl.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
---
 drivers/rpmsg/rpmsg_char.c | 48 --------------------------------------
 1 file changed, 48 deletions(-)

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 4bbbacdbf3bb..732f5caf068a 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -27,7 +27,6 @@
 #define RPMSG_DEV_MAX	(MINORMASK + 1)
 
 static dev_t rpmsg_major;
-static struct class *rpmsg_class;
 
 static DEFINE_IDA(rpmsg_ctrl_ida);
 static DEFINE_IDA(rpmsg_ept_ida);
@@ -291,41 +290,6 @@ static const struct file_operations rpmsg_eptdev_fops = {
 	.compat_ioctl = compat_ptr_ioctl,
 };
 
-static ssize_t name_show(struct device *dev, struct device_attribute *attr,
-			 char *buf)
-{
-	struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%s\n", eptdev->chinfo.name);
-}
-static DEVICE_ATTR_RO(name);
-
-static ssize_t src_show(struct device *dev, struct device_attribute *attr,
-			 char *buf)
-{
-	struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%d\n", eptdev->chinfo.src);
-}
-static DEVICE_ATTR_RO(src);
-
-static ssize_t dst_show(struct device *dev, struct device_attribute *attr,
-			 char *buf)
-{
-	struct rpmsg_eptdev *eptdev = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%d\n", eptdev->chinfo.dst);
-}
-static DEVICE_ATTR_RO(dst);
-
-static struct attribute *rpmsg_eptdev_attrs[] = {
-	&dev_attr_name.attr,
-	&dev_attr_src.attr,
-	&dev_attr_dst.attr,
-	NULL
-};
-ATTRIBUTE_GROUPS(rpmsg_eptdev);
-
 static void rpmsg_eptdev_release_device(struct device *dev)
 {
 	struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
@@ -358,9 +322,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
 	init_waitqueue_head(&eptdev->readq);
 
 	device_initialize(dev);
-	dev->class = rpmsg_class;
 	dev->parent = &ctrldev->dev;
-	dev->groups = rpmsg_eptdev_groups;
 	dev_set_drvdata(dev, eptdev);
 
 	cdev_init(&eptdev->cdev, &rpmsg_eptdev_fops);
@@ -477,7 +439,6 @@ static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev)
 	dev = &ctrldev->dev;
 	device_initialize(dev);
 	dev->parent = &rpdev->dev;
-	dev->class = rpmsg_class;
 
 	cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops);
 	ctrldev->cdev.owner = THIS_MODULE;
@@ -553,17 +514,9 @@ static int rpmsg_char_init(void)
 		return ret;
 	}
 
-	rpmsg_class = class_create(THIS_MODULE, "rpmsg");
-	if (IS_ERR(rpmsg_class)) {
-		pr_err("failed to create rpmsg class\n");
-		unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
-		return PTR_ERR(rpmsg_class);
-	}
-
 	ret = register_rpmsg_driver(&rpmsg_chrdev_driver);
 	if (ret < 0) {
 		pr_err("rpmsgchr: failed to register rpmsg driver\n");
-		class_destroy(rpmsg_class);
 		unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
 	}
 
@@ -574,7 +527,6 @@ postcore_initcall(rpmsg_char_init);
 static void rpmsg_chrdev_exit(void)
 {
 	unregister_rpmsg_driver(&rpmsg_chrdev_driver);
-	class_destroy(rpmsg_class);
 	unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
 }
 module_exit(rpmsg_chrdev_exit);
-- 
2.17.1