TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iio: backend: add support for data size set

Browse Source 
Add backend support for setting the data size used.
This setting can be adjusted within the IP cores interfacing devices.

Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-3-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Antoniu Miclaus 2025-02-14 15:19:48 +02:00 committed by Jonathan Cameron
parent 4018ab4263
commit fc3fdb835e
2 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/iio/industrialio-backend.c
View File

@ -660,6 +660,27 @@ int iio_backend_interface_type_get(struct iio_backend *back,
}
EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, "IIO_BACKEND");
/**
* iio_backend_data_size_set - set the data width/size in the data bus.
* @back: Backend device
* @size: Size in bits
*
* Some frontend devices can dynamically control the word/data size on the
* interface/data bus. Hence, the backend device needs to be aware of it so
* data can be correctly transferred.
*
* Return:
* 0 on success, negative error number on failure.
*/
int iio_backend_data_size_set(struct iio_backend *back, unsigned int size)
{
if (!size)
return -EINVAL;
return iio_backend_op_call(back, data_size_set, size);
}
EXPORT_SYMBOL_NS_GPL(iio_backend_data_size_set, "IIO_BACKEND");
/**
* iio_backend_extend_chan_spec - Extend an IIO channel
* @back: Backend device

3
include/linux/iio/backend.h
View File

@ -95,6 +95,7 @@ enum iio_backend_interface_type {
* @ext_info_set: Extended info setter.
* @ext_info_get: Extended info getter.
* @interface_type_get: Interface type.
* @data_size_set: Data size.
* @read_raw: Read a channel attribute from a backend device
* @debugfs_print_chan_status: Print channel status into a buffer.
* @debugfs_reg_access: Read or write register value of backend.
@ -137,6 +138,7 @@ struct iio_backend_ops {
const struct iio_chan_spec *chan, char *buf);
int (*interface_type_get)(struct iio_backend *back,
enum iio_backend_interface_type *type);
int (*data_size_set)(struct iio_backend *back, unsigned int size);
int (*read_raw)(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);
@ -197,6 +199,7 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private,
const struct iio_chan_spec *chan, char *buf);
int iio_backend_interface_type_get(struct iio_backend *back,
enum iio_backend_interface_type *type);
int iio_backend_data_size_set(struct iio_backend *back, unsigned int size);
int iio_backend_read_raw(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);