Merge tag 'soc-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

[firefly-linux-kernel-4.4.55.git] / drivers / acpi / sysfs.c

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 41c0504470dbc8a09ebf79ae044963c70dface82..fcae5fa2e1b322481ec2b331c4df0430bff66d53 100644 (file)
--- 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;
 }