From 8261d961d1f397925d7a470864c14663d01ed714 Mon Sep 17 00:00:00 2001 From: Daniel Baluta Date: Mon, 9 Nov 2015 09:13:59 +0200 Subject: iio: core: Introduce IIO configfs support This patch creates the IIO configfs root group. The group will appear under /iio/, usually /config/iio. We introduce configfs support in IIO in order to be able to easily create IIO objects from userspace. The first supported IIO objects are triggers introduced with next patches. Signed-off-by: Daniel Baluta Tested-by: Matt Ranostay Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-configfs.c | 50 +++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 drivers/iio/industrialio-configfs.c (limited to 'drivers/iio/industrialio-configfs.c') diff --git a/drivers/iio/industrialio-configfs.c b/drivers/iio/industrialio-configfs.c new file mode 100644 index 000000000000..83563dd7fcf4 --- /dev/null +++ b/drivers/iio/industrialio-configfs.c @@ -0,0 +1,50 @@ +/* + * Industrial I/O configfs bits + * + * 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 +#include +#include +#include +#include + +#include + +static struct config_item_type iio_root_group_type = { + .ct_owner = THIS_MODULE, +}; + +struct configfs_subsystem iio_configfs_subsys = { + .su_group = { + .cg_item = { + .ci_namebuf = "iio", + .ci_type = &iio_root_group_type, + }, + }, + .su_mutex = __MUTEX_INITIALIZER(iio_configfs_subsys.su_mutex), +}; +EXPORT_SYMBOL(iio_configfs_subsys); + +static int __init iio_configfs_init(void) +{ + config_group_init(&iio_configfs_subsys.su_group); + + return configfs_register_subsystem(&iio_configfs_subsys); +} +module_init(iio_configfs_init); + +static void __exit iio_configfs_exit(void) +{ + configfs_unregister_subsystem(&iio_configfs_subsys); +} +module_exit(iio_configfs_exit); + +MODULE_AUTHOR("Daniel Baluta "); +MODULE_DESCRIPTION("Industrial I/O configfs support"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3