Re: [PATCH 09/12] iio: dac: ad5686: implement new sync() op for the spi bus

[Rodrigo Alencar]

On 26/06/02 10:14PM, Andy Shevchenko wrote:
> On Tue, Jun 02, 2026 at 05:33:56PM +0100, Rodrigo Alencar via B4 Relay wrote:
> 
> > Use of local SPI bus data to manage a collection of SPI transfers and
> > flush them to the SPI platform driver with the sync() operation. This
> > allows for faster handling of multiple channel DAC writes, avoiding kernel
> > overhead per spi_sync() call, which will be helpful when enabling
> > triggered buffer support.
> 
> Why spi_message_alloc() can't be used instead of manual handling?
> (Seems no current users, so you even can modify it for your needs.)

I need to manually call spi_message_add_tail() to append messages.
I suppose that such function is a bit weird and no wonder why it
is not being used. struct spi_message_with_transfers might need
to be properly declared so that users can populate the transfer
array without manually moving pointers or having to redefine the type.
 
-- 
Kind regards,

Rodrigo Alencar