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cba57ed6f1
This adds ConfigFS support to USB4/Thunderbolt bus. By itself this just creates the subsystem but it exposes functions that can be used to register groups under it. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ConfigFS support
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*
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* Copyright (C) 2026, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*/
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#include <linux/configfs.h>
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#include <linux/export.h>
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#include "tb.h"
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static const struct config_item_type tb_root_group_type = {
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.ct_owner = THIS_MODULE,
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};
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static struct configfs_subsystem tb_configfs = {
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.su_group = {
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.cg_item = {
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.ci_namebuf = "thunderbolt",
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.ci_type = &tb_root_group_type,
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},
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},
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};
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/**
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* tb_configfs_register_group() - Register Thunderbolt ConfigFS group
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* @group: Group to register.
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*
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* Registers the new @group under Thunderbolt subsystem ConfigFS.
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*
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* Return: 0% in case of success, negative errno otherwise.
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*/
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int tb_configfs_register_group(struct config_group *group)
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{
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return configfs_register_group(&tb_configfs.su_group, group);
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}
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EXPORT_SYMBOL_GPL(tb_configfs_register_group);
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/**
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* tb_configfs_unregister_group() - Unregister previously registered group
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* @group: Group to unregister.
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*/
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void tb_configfs_unregister_group(struct config_group *group)
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{
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configfs_unregister_group(group);
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}
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EXPORT_SYMBOL_GPL(tb_configfs_unregister_group);
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int tb_configfs_init(void)
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{
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config_group_init(&tb_configfs.su_group);
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mutex_init(&tb_configfs.su_mutex);
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return configfs_register_subsystem(&tb_configfs);
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}
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void tb_configfs_exit(void)
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{
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configfs_unregister_subsystem(&tb_configfs);
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}
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