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 <daniel.baluta@xxxxxxxxx>
---
drivers/iio/Kconfig | 8 +++++
drivers/iio/Makefile | 1 +
drivers/iio/industrialio-configfs.c | 67 +++++++++++++++++++++++++++++++++++++
3 files changed, 76 insertions(+)
create mode 100644 drivers/iio/industrialio-configfs.c
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 4011eff..f2b0d77 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -18,6 +18,14 @@ config IIO_BUFFER
Provide core support for various buffer based data
acquisition methods.
+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.
+
if IIO_BUFFER
config IIO_BUFFER_CB
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 698afc2..dbf5f9a 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -9,6 +9,7 @@ industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
industrialio-$(CONFIG_IIO_BUFFER_CB) += buffer_cb.o
obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o
+obj-$(CONFIG_IIO_CONFIGFS) += industrialio-configfs.o
obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o
obj-y += accel/
diff --git a/drivers/iio/industrialio-configfs.c b/drivers/iio/industrialio-configfs.c
new file mode 100644
index 0000000..3edee90
--- /dev/null
+++ b/drivers/iio/industrialio-configfs.c
@@ -0,0 +1,67 @@
+/*
+ * 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_triggers_group_type = {
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group iio_triggers_group = {
+ .cg_item = {
+ .ci_namebuf = "triggers",
+ .ci_type = &iio_triggers_group_type,
+ },
+};
+
+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 <daniel.baluta@xxxxxxxxx>");
+MODULE_DESCRIPTION("Industrial I/O configfs support");
+MODULE_LICENSE("GPL v2");
--
2.1.4
--
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