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iio: backend: add API for oversampling

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Add backend support for setting oversampling ratio.

Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-4-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Antoniu Miclaus 2025-02-14 15:19:49 +02:00 committed by Jonathan Cameron
parent fc3fdb835e
commit 22894e0be9
2 changed files with 20 additions and 0 deletions
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15
drivers/iio/industrialio-backend.c
View File

@ -681,6 +681,21 @@ int iio_backend_data_size_set(struct iio_backend *back, unsigned int size)
}
EXPORT_SYMBOL_NS_GPL(iio_backend_data_size_set, "IIO_BACKEND");
/**
* iio_backend_oversampling_ratio_set - set the oversampling ratio
* @back: Backend device
* @ratio: The oversampling ratio - value 1 corresponds to no oversampling.
*
* Return:
* 0 on success, negative error number on failure.
*/
int iio_backend_oversampling_ratio_set(struct iio_backend *back,
unsigned int ratio)
{
return iio_backend_op_call(back, oversampling_ratio_set, ratio);
}
EXPORT_SYMBOL_NS_GPL(iio_backend_oversampling_ratio_set, "IIO_BACKEND");
/**
* iio_backend_extend_chan_spec - Extend an IIO channel
* @back: Backend device

5
include/linux/iio/backend.h
View File

@ -96,6 +96,7 @@ enum iio_backend_interface_type {
* @ext_info_get: Extended info getter.
* @interface_type_get: Interface type.
* @data_size_set: Data size.
* @oversampling_ratio_set: Set Oversampling ratio.
* @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.
@ -139,6 +140,8 @@ struct iio_backend_ops {
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 (*oversampling_ratio_set)(struct iio_backend *back,
unsigned int ratio);
int (*read_raw)(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);
@ -200,6 +203,8 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private,
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_oversampling_ratio_set(struct iio_backend *back,
unsigned int ratio);
int iio_backend_read_raw(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);