Commit 4018ab42 authored by Antoniu Miclaus's avatar Antoniu Miclaus Committed by Jonathan Cameron
Browse files

iio: backend: add API for interface get 



Add backend support for obtaining the interface type used.

Reviewed-by: default avatarNuno Sa <nuno.sa@analog.com>
Reviewed-by: default avatarDavid Lechner <dlechner@baylibre.com>
Signed-off-by: default avatarAntoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-2-antoniu.miclaus@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent ac856912

drivers/iio/industrialio-backend.c

+24 −0
Original line number Diff line number Diff line
@@ -636,6 +636,30 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, 
}

EXPORT_SYMBOL_NS_GPL(iio_backend_ext_info_set, "IIO_BACKEND");



/**

 * iio_backend_interface_type_get - get the interface type used.

 * @back: Backend device

 * @type: Interface type

 *

 * RETURNS:

 * 0 on success, negative error number on failure.

 */

int iio_backend_interface_type_get(struct iio_backend *back,

				   enum iio_backend_interface_type *type)

{

	int ret;



	ret = iio_backend_op_call(back, interface_type_get, type);

	if (ret)

		return ret;



	if (*type >= IIO_BACKEND_INTERFACE_MAX)

		return -EINVAL;



	return 0;

}

EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, "IIO_BACKEND");



/**

 * iio_backend_extend_chan_spec - Extend an IIO channel

 * @back: Backend device

include/linux/iio/backend.h

+11 −0
Original line number Diff line number Diff line
@@ -70,6 +70,12 @@ enum iio_backend_sample_trigger { 
	IIO_BACKEND_SAMPLE_TRIGGER_MAX

};



enum iio_backend_interface_type {

	IIO_BACKEND_INTERFACE_SERIAL_LVDS,

	IIO_BACKEND_INTERFACE_SERIAL_CMOS,

	IIO_BACKEND_INTERFACE_MAX

};



/**

 * struct iio_backend_ops - operations structure for an iio_backend

 * @enable: Enable backend.
@@ -88,6 +94,7 @@ enum iio_backend_sample_trigger { 
 * @extend_chan_spec: Extend an IIO channel.

 * @ext_info_set: Extended info setter.

 * @ext_info_get: Extended info getter.

 * @interface_type_get: Interface type.

 * @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.
@@ -128,6 +135,8 @@ struct iio_backend_ops { 
			    const char *buf, size_t len);

	int (*ext_info_get)(struct iio_backend *back, uintptr_t private,

			    const struct iio_chan_spec *chan, char *buf);

	int (*interface_type_get)(struct iio_backend *back,

				  enum iio_backend_interface_type *type);

	int (*read_raw)(struct iio_backend *back,

			struct iio_chan_spec const *chan, int *val, int *val2,

			long mask);
@@ -186,6 +195,8 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, 
				 const char *buf, size_t len);

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_read_raw(struct iio_backend *back,

			 struct iio_chan_spec const *chan, int *val, int *val2,

			 long mask);