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iio: backend: add support for data alignment

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Add backend support for staring the capture synchronization.
When activated, it initates a proccess that aligns the sample's most
significant bit (MSB) based solely on the captured data, without
considering any other external signals.

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250516082630.8236-3-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Antoniu Miclaus 2025-05-16 11:26:22 +03:00 committed by Jonathan Cameron
parent dc38441890
commit 995fd6e002
2 changed files with 26 additions and 0 deletions
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23
drivers/iio/industrialio-backend.c
View File

@ -826,6 +826,29 @@ int iio_backend_filter_type_set(struct iio_backend *back,
}
EXPORT_SYMBOL_NS_GPL(iio_backend_filter_type_set, "IIO_BACKEND");
/**
* iio_backend_interface_data_align - Perform the data alignment process.
* @back: Backend device
* @timeout_us: Timeout value in us.
*
* When activated, it initates a proccess that aligns the sample's most
* significant bit (MSB) based solely on the captured data, without
* considering any other external signals.
*
* The timeout_us value must be greater than 0.
*
* RETURNS:
* 0 on success, negative error number on failure.
*/
int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us)
{
if (!timeout_us)
return -EINVAL;
return iio_backend_op_call(back, interface_data_align, timeout_us);
}
EXPORT_SYMBOL_NS_GPL(iio_backend_interface_data_align, "IIO_BACKEND");
/**
* iio_backend_ddr_enable - Enable interface DDR (Double Data Rate) mode
* @back: Backend device

3
include/linux/iio/backend.h
View File

@ -110,6 +110,7 @@ enum iio_backend_filter_type {
* @debugfs_print_chan_status: Print channel status into a buffer.
* @debugfs_reg_access: Read or write register value of backend.
* @filter_type_set: Set filter type.
* @interface_data_align: Perform the data alignment process.
* @ddr_enable: Enable interface DDR (Double Data Rate) mode.
* @ddr_disable: Disable interface DDR (Double Data Rate) mode.
* @data_stream_enable: Enable data stream.
@ -164,6 +165,7 @@ struct iio_backend_ops {
unsigned int writeval, unsigned int *readval);
int (*filter_type_set)(struct iio_backend *back,
enum iio_backend_filter_type type);
int (*interface_data_align)(struct iio_backend *back, u32 timeout_us);
int (*ddr_enable)(struct iio_backend *back);
int (*ddr_disable)(struct iio_backend *back);
int (*data_stream_enable)(struct iio_backend *back);
@ -208,6 +210,7 @@ int devm_iio_backend_request_buffer(struct device *dev,
struct iio_dev *indio_dev);
int iio_backend_filter_type_set(struct iio_backend *back,
enum iio_backend_filter_type type);
int iio_backend_interface_data_align(struct iio_backend *back, u32 timeout_us);
int iio_backend_ddr_enable(struct iio_backend *back);
int iio_backend_ddr_disable(struct iio_backend *back);
int iio_backend_data_stream_enable(struct iio_backend *back);