Register the ACPI subsystem with configfs.
Signed-off-by: Octavian Purdila <octavian.purdila@xxxxxxxxx>
---
Documentation/ABI/testing/configfs-acpi | 7 ++++++
MAINTAINERS | 1 +
drivers/acpi/Kconfig | 9 ++++++++
drivers/acpi/Makefile | 1 +
drivers/acpi/configfs.c | 39 +++++++++++++++++++++++++++++++++
5 files changed, 57 insertions(+)
create mode 100644 Documentation/ABI/testing/configfs-acpi
create mode 100644 drivers/acpi/configfs.c
diff --git a/Documentation/ABI/testing/configfs-acpi b/Documentation/ABI/testing/configfs-acpi
new file mode 100644
index 0000000..0c806aa
--- /dev/null
+++ b/Documentation/ABI/testing/configfs-acpi
@@ -0,0 +1,7 @@
+What: /config/acpi
+Date: April 2016
+KernelVersion: 4.6
+Contact: linux-acpi@xxxxxxxxxxxxxxx
+Description:
+ This represents the ACPI subsystem entry point directory. It
+ contains sub-groups corresponding to ACPI configurable options.
diff --git a/MAINTAINERS b/MAINTAINERS
index 1c32f8a..6695648 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -289,6 +289,7 @@ F: include/linux/acpi.h
F: include/acpi/
F: Documentation/acpi/
F: Documentation/ABI/testing/sysfs-bus-acpi
+F: Documentation/ABI/testing/configfs-acpi
F: drivers/pci/*acpi*
F: drivers/pci/*/*acpi*
F: drivers/pci/*/*/*acpi*
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 82b96ee..7d02816 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -521,4 +521,13 @@ config XPOWER_PMIC_OPREGION
endif
+config ACPI_CONFIGFS
+ tristate "ACPI configfs support"
+ select CONFIGFS_FS
+ default n
+ help
+ Select this option to enable support for ACPI configuration from
+ userspace. The configurable ACPI groups will be visible under
+ /config/acpi, assuming configfs is mounted under /config.
+
endif # ACPI
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index edeb2d1..319e63d 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -98,5 +98,6 @@ obj-$(CONFIG_ACPI_EXTLOG) += acpi_extlog.o
obj-$(CONFIG_PMIC_OPREGION) += pmic/intel_pmic.o
obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o
obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
+obj-$(CONFIG_ACPI_CONFIGFS) += configfs.o
video-objs += acpi_video.o video_detect.o
diff --git a/drivers/acpi/configfs.c b/drivers/acpi/configfs.c
new file mode 100644
index 0000000..96aa3d8
--- /dev/null
+++ b/drivers/acpi/configfs.c
@@ -0,0 +1,39 @@
+/*
+ * ACPI configfs support
+ *
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/configfs.h>
+#include <linux/acpi.h>
+
+static int __init acpi_configfs_init(void)
+{
+ int ret;
+ struct config_group *root = &acpi_configfs.su_group;
+
+ config_group_init(root);
+
+ ret = configfs_register_subsystem(&acpi_configfs);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+module_init(acpi_configfs_init);
+
+static void __exit acpi_configfs_exit(void)
+{
+ configfs_unregister_subsystem(&acpi_configfs);
+}
+module_exit(acpi_configfs_exit);
+
+MODULE_AUTHOR("Octavian Purdila <octavian.purdila@xxxxxxxxx>");
+MODULE_DESCRIPTION("ACPI configfs support");
+MODULE_LICENSE("GPL v2");
--
1.9.1
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