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iio: backend: add API for interface get

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Add backend support for obtaining the interface type used.

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/20250214131955.31973-2-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Antoniu Miclaus
2025-02-14 15:19:47 +02:00
committed by Jonathan Cameron
parent ac856912f2
commit 4018ab4263
2 changed files with 35 additions and 0 deletions
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24
drivers/iio/industrialio-backend.c
View File

@@ -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

11
include/linux/iio/backend.h
View File

@@ -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);