From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Baluta Subject: [PATCH v8 2/5] iio: core: Introduce IIO configfs support Date: Tue, 20 Oct 2015 13:53:43 +0300 Message-ID: <1445338426-4126-3-git-send-email-daniel.baluta@intel.com> References: <1445338426-4126-1-git-send-email-daniel.baluta@intel.com> Cc: knaack.h@gmx.de, linux-kernel@vger.kernel.org, octavian.purdila@intel.com, pebolle@tiscali.nl, patrick.porlan@intel.com, adriana.reus@intel.com, constantin.musca@intel.com, marten@intuitiveaerial.com, daniel.baluta@intel.com, cristina.opriceana@gmail.com, pmeerw@pmeerw.net, hch@lst.de, viro@zeniv.linux.org.uk, akpm@linux-foundation.org To: jic23@kernel.org, jlbec@evilplan.org, linux-iio@vger.kernel.org, linux-fsdevel@vger.kernel.org, lars@metafoo.de Return-path: Received: from mga01.intel.com ([192.55.52.88]:41015 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752570AbbJTKwJ (ORCPT ); Tue, 20 Oct 2015 06:52:09 -0400 In-Reply-To: <1445338426-4126-1-git-send-email-daniel.baluta@intel.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: This creates an IIO configfs subystem named "iio", with a default "triggers" group. Next patches will add trigger types support, allowing new triggers creation using configfs. Signed-off-by: Daniel Baluta --- drivers/iio/Kconfig | 8 +++++ drivers/iio/Makefile | 1 + drivers/iio/industrialio-configfs.c | 68 +++++++++++++++++++++++++++++++++++++ 3 files changed, 77 insertions(+) create mode 100644 drivers/iio/industrialio-configfs.c diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 66792e7..7a4815a 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -22,6 +22,14 @@ if IIO_BUFFER source "drivers/iio/buffer/Kconfig" endif # IIO_BUFFER +config IIO_CONFIGFS + bool "Enable IIO configuration via configfs" + select CONFIGFS_FS + help + This allows configuring various IIO bits through configfs + (e.g. software triggers). For more info see + Documentation/iio/iio_configfs.txt. + config IIO_TRIGGER bool "Enable triggered sampling support" help diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index aeca726..e109f95 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_IIO) += industrialio.o industrialio-y := industrialio-core.o industrialio-event.o inkern.o industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o +industrialio-$(CONFIG_IIO_CONFIGFS) += industrialio-configfs.o industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o obj-$(CONFIG_IIO_TRIGGERED_EVENT) += industrialio-triggered-event.o diff --git a/drivers/iio/industrialio-configfs.c b/drivers/iio/industrialio-configfs.c new file mode 100644 index 0000000..211b52e --- /dev/null +++ b/drivers/iio/industrialio-configfs.c @@ -0,0 +1,68 @@ +/* + * 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_triggers_group_type = { + .ct_owner = THIS_MODULE, +}; + +struct config_group iio_triggers_group = { + .cg_item = { + .ci_namebuf = "triggers", + .ci_type = &iio_triggers_group_type, + }, +}; +EXPORT_SYMBOL(iio_triggers_group); + +static struct config_group *iio_root_default_groups[] = { + &iio_triggers_group, + NULL +}; + +static struct config_item_type iio_root_group_type = { + .ct_owner = THIS_MODULE, +}; + +static struct configfs_subsystem iio_configfs_subsys = { + .su_group = { + .cg_item = { + .ci_namebuf = "iio", + .ci_type = &iio_root_group_type, + }, + .default_groups = iio_root_default_groups, + }, + .su_mutex = __MUTEX_INITIALIZER(iio_configfs_subsys.su_mutex), +}; + +static int __init iio_configfs_init(void) +{ + config_group_init(&iio_triggers_group); + 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"); -- 1.9.1