diff options
Diffstat (limited to 'drivers/staging/iio/Documentation')
| -rw-r--r-- | drivers/staging/iio/Documentation/generic_buffer.c | 8 | ||||
| -rw-r--r-- | drivers/staging/iio/Documentation/iio_utils.h | 26 | ||||
| -rw-r--r-- | drivers/staging/iio/Documentation/ring.txt | 10 | ||||
| -rw-r--r-- | drivers/staging/iio/Documentation/sysfs-bus-iio | 10 |
4 files changed, 40 insertions, 14 deletions
diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c index d58095321491..69a05b9456d6 100644 --- a/drivers/staging/iio/Documentation/generic_buffer.c +++ b/drivers/staging/iio/Documentation/generic_buffer.c @@ -28,6 +28,7 @@ #include <linux/types.h> #include <string.h> #include <poll.h> +#include <endian.h> #include "iio_utils.h" /** @@ -56,6 +57,13 @@ int size_from_channelarray(struct iio_channel_info *channels, int num_channels) void print2byte(int input, struct iio_channel_info *info) { + /* First swap if incorrect endian */ + + if (info->be) + input = be16toh((uint_16t)input); + else + input = le16toh((uint_16t)input); + /* shift before conversion to avoid sign extension of left aligned data */ input = input >> info->shift; diff --git a/drivers/staging/iio/Documentation/iio_utils.h b/drivers/staging/iio/Documentation/iio_utils.h index 75938b2412ff..6f3a392297ec 100644 --- a/drivers/staging/iio/Documentation/iio_utils.h +++ b/drivers/staging/iio/Documentation/iio_utils.h @@ -13,6 +13,7 @@ #include <ctype.h> #include <stdio.h> #include <stdint.h> +#include <dirent.h> #define IIO_MAX_NAME_LENGTH 30 @@ -73,6 +74,7 @@ struct iio_channel_info { unsigned bits_used; unsigned shift; uint64_t mask; + unsigned be; unsigned is_signed; unsigned enabled; unsigned location; @@ -83,6 +85,7 @@ struct iio_channel_info { * @is_signed: output whether channel is signed * @bytes: output how many bytes the channel storage occupies * @mask: output a bit mask for the raw data + * @be: big endian * @device_dir: the iio device directory * @name: the channel name * @generic_name: the channel type name @@ -92,6 +95,7 @@ inline int iioutils_get_type(unsigned *is_signed, unsigned *bits_used, unsigned *shift, uint64_t *mask, + unsigned *be, const char *device_dir, const char *name, const char *generic_name) @@ -100,7 +104,7 @@ inline int iioutils_get_type(unsigned *is_signed, int ret; DIR *dp; char *scan_el_dir, *builtname, *builtname_generic, *filename = 0; - char signchar; + char signchar, endianchar; unsigned padint; const struct dirent *ent; @@ -144,9 +148,18 @@ inline int iioutils_get_type(unsigned *is_signed, ret = -errno; goto error_free_filename; } - fscanf(sysfsfp, - "%c%u/%u>>%u", &signchar, bits_used, - &padint, shift); + + ret = fscanf(sysfsfp, + "%ce:%c%u/%u>>%u", + &endianchar, + &signchar, + bits_used, + &padint, shift); + if (ret < 0) { + printf("failed to pass scan type description\n"); + return ret; + } + *be = (endianchar == 'b'); *bytes = padint / 8; if (*bits_used == 64) *mask = ~0; @@ -156,6 +169,10 @@ inline int iioutils_get_type(unsigned *is_signed, *is_signed = 1; else *is_signed = 0; + fclose(sysfsfp); + free(filename); + + filename = 0; } error_free_filename: if (filename) @@ -386,6 +403,7 @@ inline int build_channel_array(const char *device_dir, ¤t->bits_used, ¤t->shift, ¤t->mask, + ¤t->be, device_dir, current->name, current->generic_name); diff --git a/drivers/staging/iio/Documentation/ring.txt b/drivers/staging/iio/Documentation/ring.txt index 7e99ef2b7bc0..e33807761cd7 100644 --- a/drivers/staging/iio/Documentation/ring.txt +++ b/drivers/staging/iio/Documentation/ring.txt @@ -23,10 +23,6 @@ The function pointers within here are used to allow the core to handle as much buffer functionality as possible. Note almost all of these are optional. -mark_in_use, unmark_in_use - Basically indicate that not changes should be made to the buffer state that - will effect the form of the data being captures (e.g. scan elements or length) - store_to If possible, push data to the buffer. @@ -39,8 +35,6 @@ rip_first_n The primary buffer reading function. Note that it may well not return as much data as requested. -mark_param_changed - Used to indicate that something has changed. Used in conjunction with request_update If parameters have changed that require reinitialization or configuration of the buffer this will trigger it. @@ -51,7 +45,3 @@ get_bytes_per_datum, set_bytes_per_datum get_length / set_length Get/set the number of complete scans that may be held by the buffer. -is_enabled - Query if ring buffer is in use -enable - Start the ring buffer. diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio index 0d6823d19b61..46a995d6d261 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio @@ -276,6 +276,16 @@ Description: If a discrete set of scale values are available, they are listed in this attribute. +What: /sys/.../in_accel_filter_low_pass_3db_frequency +What: /sys/.../in_magn_filter_low_pass_3db_frequency +What: /sys/.../in_anglvel_filter_low_pass_3db_frequency +KernelVersion: 3.2 +Contact: linux-iio@vger.kernel.org +Description: + If a known or controllable low pass filter is applied + to the underlying data channel, then this parameter + gives the 3dB frequency of the filter in Hz. + What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org |