Re: [PATCH] iio: adc: ad4000: Avoid potential double data word read

[David Lechner]

On 4/15/25 7:21 AM, Marcelo Schmitt wrote:
> Currently, SPI-Engine offload module always sends 32-bit data elements to
> DMA engine. Appropriately, when set for SPI offloading, the IIO driver uses
> 32 storagebits for IIO ADC channel buffer elements. However, setting SPI
> transfer length according to storagebits (32-bits in case of offload) can
> lead to unnecessarily long transfers for ADCs that are 16-bit or less
> precision. Adjust AD4000 single-shot read to run transfers of 2 bytes when
> that is enough to get all ADC data bits.
> 
> Fixes: d0dba3df842f ("iio: adc: ad4000: Add support for SPI offload")
> Suggested-by: David Lechner <dlechner@xxxxxxxxxxxx>
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
> ---

Reviewed-by: David Lechner <dlechner@xxxxxxxxxxxx>