Add backend support for obtaining the interface type used.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
---
changes in v2:
- add IIO_BACKEND_INTERFACE_COUNT in enum.
- add trailing commas where applies.
drivers/iio/industrialio-backend.c | 24 ++++++++++++++++++++++++
include/linux/iio/backend.h | 11 +++++++++++
2 files changed, 35 insertions(+)
diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index efe05be284b6..a322b0be7b2c 100644
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -449,6 +449,30 @@ 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 interace 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_COUNT)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, IIO_BACKEND);
+
/**
* iio_backend_extend_chan_spec - Extend an IIO channel
* @indio_dev: IIO device
diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h
index 8099759d7242..34fc76c99d8a 100644
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -63,6 +63,12 @@ enum iio_backend_sample_trigger {
IIO_BACKEND_SAMPLE_TRIGGER_MAX
};
+enum iio_backend_interface_type {
+ IIO_BACKEND_INTERFACE_LVDS,
+ IIO_BACKEND_INTERFACE_CMOS,
+ IIO_BACKEND_INTERFACE_COUNT,
+};
+
/**
* struct iio_backend_ops - operations structure for an iio_backend
* @enable: Enable backend.
@@ -81,6 +87,7 @@ 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.
**/
struct iio_backend_ops {
int (*enable)(struct iio_backend *back);
@@ -113,6 +120,8 @@ 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 iio_backend_chan_enable(struct iio_backend *back, unsigned int chan);
@@ -142,6 +151,8 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private,
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_extend_chan_spec(struct iio_dev *indio_dev,
struct iio_backend *back,
struct iio_chan_spec *chan);
--
2.46.2
