From: Daniel Baluta <daniel.baluta@intel.com>
To: jic23@kernel.org, jlbec@evilplan.org, linux-iio@vger.kernel.org,
linux-fsdevel@vger.kernel.org, lars@metafoo.de, hch@lst.de
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, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org
Subject: [PATCH v10 2/5] iio: core: Introduce IIO configfs support
Date: Fri, 23 Oct 2015 18:33:28 +0300 [thread overview]
Message-ID: <1445614411-533-3-git-send-email-daniel.baluta@intel.com> (raw)
In-Reply-To: <1445614411-533-1-git-send-email-daniel.baluta@intel.com>
This patch creates the IIO configfs root group. The group
will appear under <mount-point>/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 <daniel.baluta@intel.com>
---
drivers/iio/Kconfig | 8 ++++++
drivers/iio/Makefile | 1 +
drivers/iio/industrialio-configfs.c | 50 +++++++++++++++++++++++++++++++++++++
3 files changed, 59 insertions(+)
create mode 100644 drivers/iio/industrialio-configfs.c
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 66792e7..d0f1ddb 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
+ tristate "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..4e8ac82 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -7,6 +7,7 @@ industrialio-y := industrialio-core.o industrialio-event.o inkern.o
industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
+obj-$(CONFIG_IIO_CONFIGFS) += industrialio-configfs.o
obj-$(CONFIG_IIO_TRIGGERED_EVENT) += industrialio-triggered-event.o
obj-y += accel/
diff --git a/drivers/iio/industrialio-configfs.c b/drivers/iio/industrialio-configfs.c
new file mode 100644
index 0000000..83563dd
--- /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 <linux/configfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/slab.h>
+
+#include <linux/iio/iio.h>
+
+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 <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("Industrial I/O configfs support");
+MODULE_LICENSE("GPL v2");
--
1.9.1
next prev parent reply other threads:[~2015-10-23 15:31 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-23 15:33 [PATCH v10 0/5] Add initial configfs support for IIO Daniel Baluta
2015-10-23 15:33 ` [PATCH v10 1/5] configfs: Allow dynamic group creation Daniel Baluta
2015-11-06 7:50 ` Christoph Hellwig
2015-11-06 8:48 ` Daniel Baluta
2015-11-06 9:31 ` Lars-Peter Clausen
[not found] ` <A334FE9C-F187-4304-AA98-6A40347AF731@jic23.retrosnub.co.uk>
2015-11-07 13:09 ` Christoph Hellwig
2015-11-08 15:30 ` Jonathan Cameron
2015-11-10 6:51 ` Christoph Hellwig
2015-11-10 21:12 ` Andrew Morton
2015-11-11 6:43 ` Jonathan Cameron
2015-11-15 10:39 ` Jonathan Cameron
2015-11-17 23:47 ` Andrew Morton
2015-11-18 7:33 ` Jonathan Cameron
2015-11-29 17:27 ` Jonathan Cameron
2015-12-02 18:32 ` Jonathan Cameron
2015-11-11 23:08 ` Joel Becker
2015-10-23 15:33 ` Daniel Baluta [this message]
2015-10-24 9:11 ` [PATCH v10 2/5] iio: core: Introduce IIO configfs support Matt Ranostay
2015-10-23 15:33 ` [PATCH v10 3/5] iio: core: Introduce IIO software triggers Daniel Baluta
2015-10-23 16:38 ` [PATCH] iio: core: fix ptr_ret.cocci warnings kbuild test robot
2015-10-23 16:38 ` [PATCH v10 3/5] iio: core: Introduce IIO software triggers kbuild test robot
2015-10-23 15:33 ` [PATCH v10 4/5] iio: trigger: Introduce IIO hrtimer based trigger Daniel Baluta
2015-10-23 15:33 ` [PATCH v10 5/5] iio: Documentation: Add IIO configfs documentation Daniel Baluta
2015-10-27 8:35 ` Crt Mori
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1445614411-533-3-git-send-email-daniel.baluta@intel.com \
--to=daniel.baluta@intel.com \
--cc=adriana.reus@intel.com \
--cc=akpm@linux-foundation.org \
--cc=constantin.musca@intel.com \
--cc=cristina.opriceana@gmail.com \
--cc=hch@lst.de \
--cc=jic23@kernel.org \
--cc=jlbec@evilplan.org \
--cc=knaack.h@gmx.de \
--cc=lars@metafoo.de \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marten@intuitiveaerial.com \
--cc=octavian.purdila@intel.com \
--cc=patrick.porlan@intel.com \
--cc=pebolle@tiscali.nl \
--cc=pmeerw@pmeerw.net \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).