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authorJonathan Cameron <jic23@kernel.org>2012-04-25 18:54:58 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-25 22:01:43 +0400
commit06458e277eac2b8761b0a04d3c808d57be281a2e (patch)
treecba55bcbdd101a3ab84bfe27fccdb9efd18d757e /include/linux/iio/sysfs.h
parent68284a12923f9f8f2741efca10c045e179f2e753 (diff)
downloadlinux-06458e277eac2b8761b0a04d3c808d57be281a2e.tar.xz
IIO: Move core headers to include/linux/iio
Step 1 in moving the IIO core out of staging. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/iio/sysfs.h')
-rw-r--r--include/linux/iio/sysfs.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h
new file mode 100644
index 000000000000..bfedb73b850e
--- /dev/null
+++ b/include/linux/iio/sysfs.h
@@ -0,0 +1,117 @@
+/* The industrial I/O core
+ *
+ *Copyright (c) 2008 Jonathan Cameron
+ *
+ * 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.
+ *
+ * General attributes
+ */
+
+#ifndef _INDUSTRIAL_IO_SYSFS_H_
+#define _INDUSTRIAL_IO_SYSFS_H_
+
+struct iio_chan_spec;
+
+/**
+ * struct iio_dev_attr - iio specific device attribute
+ * @dev_attr: underlying device attribute
+ * @address: associated register address
+ * @l: list head for maintaining list of dynamically created attrs.
+ */
+struct iio_dev_attr {
+ struct device_attribute dev_attr;
+ u64 address;
+ struct list_head l;
+ struct iio_chan_spec const *c;
+};
+
+#define to_iio_dev_attr(_dev_attr) \
+ container_of(_dev_attr, struct iio_dev_attr, dev_attr)
+
+ssize_t iio_read_const_attr(struct device *dev,
+ struct device_attribute *attr,
+ char *len);
+
+/**
+ * struct iio_const_attr - constant device specific attribute
+ * often used for things like available modes
+ * @string: attribute string
+ * @dev_attr: underlying device attribute
+ */
+struct iio_const_attr {
+ const char *string;
+ struct device_attribute dev_attr;
+};
+
+#define to_iio_const_attr(_dev_attr) \
+ container_of(_dev_attr, struct iio_const_attr, dev_attr)
+
+/* Some attributes will be hard coded (device dependent) and not require an
+ address, in these cases pass a negative */
+#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
+ { .dev_attr = __ATTR(_name, _mode, _show, _store), \
+ .address = _addr }
+
+#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
+ struct iio_dev_attr iio_dev_attr_##_name \
+ = IIO_ATTR(_name, _mode, _show, _store, _addr)
+
+#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
+ struct iio_dev_attr iio_dev_attr_##_vname \
+ = IIO_ATTR(_name, _mode, _show, _store, _addr)
+
+#define IIO_CONST_ATTR(_name, _string) \
+ struct iio_const_attr iio_const_attr_##_name \
+ = { .string = _string, \
+ .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
+
+#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
+ struct iio_const_attr iio_const_attr_##_vname \
+ = { .string = _string, \
+ .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
+
+/* Generic attributes of onetype or another */
+/**
+ * IIO_DEV_ATTR_RESET: resets the device
+ **/
+#define IIO_DEV_ATTR_RESET(_store) \
+ IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0)
+
+/**
+ * IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
+ * @_mode: sysfs file mode/permissions
+ * @_show: output method for the attribute
+ * @_store: input method for the attribute
+ **/
+#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
+ IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
+
+/**
+ * IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
+ * @_show: output method for the attribute
+ *
+ * May be mode dependent on some devices
+ **/
+#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
+ IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
+/**
+ * IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
+ * @_string: frequency string for the attribute
+ *
+ * Constant version
+ **/
+#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
+ IIO_CONST_ATTR(sampling_frequency_available, _string)
+
+#define IIO_DEV_ATTR_TEMP_RAW(_show) \
+ IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0)
+
+#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
+ IIO_CONST_ATTR(in_temp_offset, _string)
+
+#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
+ IIO_CONST_ATTR(in_temp_scale, _string)
+
+#endif /* _INDUSTRIAL_IO_SYSFS_H_ */