Commit 22894e0b authored by Antoniu Miclaus's avatar Antoniu Miclaus Committed by Jonathan Cameron
Browse files

iio: backend: add API for oversampling 



Add backend support for setting oversampling ratio.

Reviewed-by: default avatarDavid Lechner <dlechner@baylibre.com>
Signed-off-by: default avatarAntoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-4-antoniu.miclaus@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent fc3fdb83

drivers/iio/industrialio-backend.c

+15 −0
Original line number Diff line number Diff line
@@ -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

include/linux/iio/backend.h

+5 −0
Original line number Diff line number Diff line
@@ -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);