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path: root/drivers/acpi/sysfs.c
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Diffstat (limited to 'drivers/acpi/sysfs.c')
-rw-r--r--drivers/acpi/sysfs.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 41c0504470db..fcae5fa2e1b3 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -7,6 +7,8 @@
#include <linux/moduleparam.h>
#include <acpi/acpi_drivers.h>
+#include "internal.h"
+
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("sysfs");
@@ -249,6 +251,7 @@ module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
static LIST_HEAD(acpi_table_attr_list);
static struct kobject *tables_kobj;
static struct kobject *dynamic_tables_kobj;
+static struct kobject *hotplug_kobj;
struct acpi_table_attr {
struct bin_attribute attr;
@@ -716,6 +719,67 @@ acpi_show_profile(struct device *dev, struct device_attribute *attr,
static const struct device_attribute pm_profile_attr =
__ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
+static ssize_t hotplug_enabled_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
+
+ return sprintf(buf, "%d\n", hotplug->enabled);
+}
+
+static ssize_t hotplug_enabled_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
+ unsigned int val;
+
+ if (kstrtouint(buf, 10, &val) || val > 1)
+ return -EINVAL;
+
+ acpi_scan_hotplug_enabled(hotplug, val);
+ return size;
+}
+
+static struct kobj_attribute hotplug_enabled_attr =
+ __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
+ hotplug_enabled_store);
+
+static struct attribute *hotplug_profile_attrs[] = {
+ &hotplug_enabled_attr.attr,
+ NULL
+};
+
+static struct kobj_type acpi_hotplug_profile_ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+ .default_attrs = hotplug_profile_attrs,
+};
+
+void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
+ const char *name)
+{
+ int error;
+
+ if (!hotplug_kobj)
+ goto err_out;
+
+ kobject_init(&hotplug->kobj, &acpi_hotplug_profile_ktype);
+ error = kobject_set_name(&hotplug->kobj, "%s", name);
+ if (error)
+ goto err_out;
+
+ hotplug->kobj.parent = hotplug_kobj;
+ error = kobject_add(&hotplug->kobj, hotplug_kobj, NULL);
+ if (error)
+ goto err_out;
+
+ kobject_uevent(&hotplug->kobj, KOBJ_ADD);
+ return;
+
+ err_out:
+ pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
+}
+
int __init acpi_sysfs_init(void)
{
int result;
@@ -723,6 +787,8 @@ int __init acpi_sysfs_init(void)
result = acpi_tables_sysfs_init();
if (result)
return result;
+
+ hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
return result;
}