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authorShaohua Li <shaohua.li@intel.com>2006-05-08 13:45:57 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 12:40:48 -0700
commit670dd90d81f60ef429cbba54ad235e9207f4d444 (patch)
tree817c62329690f69cb32439d00c25023dfe977402
parent[PATCH] Driver Core: remove unused exports (diff)
downloadlinux-dev-670dd90d81f60ef429cbba54ad235e9207f4d444.tar.xz
linux-dev-670dd90d81f60ef429cbba54ad235e9207f4d444.zip
[PATCH] Driver Core: Allow sysdev_class have attributes
allow sysdev_class adding attribute. Next patch will use the new API to add an attribute under /sys/device/system/cpu/. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/base/sys.c51
-rw-r--r--include/linux/sysdev.h18
2 files changed, 67 insertions, 2 deletions
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 6fc23ab127bd..6858178b3aff 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -80,10 +80,59 @@ void sysdev_remove_file(struct sys_device * s, struct sysdev_attribute * a)
EXPORT_SYMBOL_GPL(sysdev_create_file);
EXPORT_SYMBOL_GPL(sysdev_remove_file);
+#define to_sysdev_class(k) container_of(k, struct sysdev_class, kset.kobj)
+#define to_sysdev_class_attr(a) container_of(a, \
+ struct sysdev_class_attribute, attr)
+
+static ssize_t sysdev_class_show(struct kobject *kobj, struct attribute *attr,
+ char *buffer)
+{
+ struct sysdev_class * class = to_sysdev_class(kobj);
+ struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr);
+
+ if (class_attr->show)
+ return class_attr->show(class, buffer);
+ return -EIO;
+}
+
+static ssize_t sysdev_class_store(struct kobject *kobj, struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct sysdev_class * class = to_sysdev_class(kobj);
+ struct sysdev_class_attribute * class_attr = to_sysdev_class_attr(attr);
+
+ if (class_attr->store)
+ return class_attr->store(class, buffer, count);
+ return -EIO;
+}
+
+static struct sysfs_ops sysfs_class_ops = {
+ .show = sysdev_class_show,
+ .store = sysdev_class_store,
+};
+
+static struct kobj_type ktype_sysdev_class = {
+ .sysfs_ops = &sysfs_class_ops,
+};
+
+int sysdev_class_create_file(struct sysdev_class *c,
+ struct sysdev_class_attribute *a)
+{
+ return sysfs_create_file(&c->kset.kobj, &a->attr);
+}
+EXPORT_SYMBOL_GPL(sysdev_class_create_file);
+
+void sysdev_class_remove_file(struct sysdev_class *c,
+ struct sysdev_class_attribute *a)
+{
+ sysfs_remove_file(&c->kset.kobj, &a->attr);
+}
+EXPORT_SYMBOL_GPL(sysdev_class_remove_file);
+
/*
* declare system_subsys
*/
-static decl_subsys(system, &ktype_sysdev, NULL);
+static decl_subsys(system, &ktype_sysdev_class, NULL);
int sysdev_class_register(struct sysdev_class * cls)
{
diff --git a/include/linux/sysdev.h b/include/linux/sysdev.h
index 2a4b432e1176..166a2e58c287 100644
--- a/include/linux/sysdev.h
+++ b/include/linux/sysdev.h
@@ -37,11 +37,27 @@ struct sysdev_class {
struct kset kset;
};
+struct sysdev_class_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct sysdev_class *, char *);
+ ssize_t (*store)(struct sysdev_class *, const char *, size_t);
+};
+
+#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
+struct sysdev_class_attribute attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+};
+
extern int sysdev_class_register(struct sysdev_class *);
extern void sysdev_class_unregister(struct sysdev_class *);
-
+extern int sysdev_class_create_file(struct sysdev_class *,
+ struct sysdev_class_attribute *);
+extern void sysdev_class_remove_file(struct sysdev_class *,
+ struct sysdev_class_attribute *);
/**
* Auxillary system device drivers.
*/