Re: [PATCH 3/3] iio: adc: ad4130: add new supported parts

[Jonathan Cameron]

On Sat, 7 Mar 2026 10:27:41 -0600
David Lechner <dlechner@xxxxxxxxxxxx> wrote:

> On 3/2/26 6:51 AM, Andy Shevchenko wrote:
> > On Sat, Feb 28, 2026 at 09:39:04AM -0300, Jonathan Santos wrote:  
> >> Add support for AD4129-4/8, AD4130-4, and AD4131-4/8 variants.
> >>  
> 
> ...
> 
> >   
> >> +	/* Triggered buffer data structure */
> >> +	struct {
> >> +		u32 channels[AD4130_MAX_CHANNELS];
> >> +		s64 timestamp;  
> > 
> > Use aligned_s64 type...
> >   
> >> +	} scan __aligned(8);  
> > 
> > ...instead of this.
> >   
> 
> This is used with SPI, so it actually needs to be:
> 
> 	IIO_DECLARE_DMA_BUFFER_WITH_TS(u32, channels, AD4130_MAX_CHANNELS);
Whilst you are correct, that reasoning is partial.

We could have marked it as sufficiently aligned.
The buffer part make sense because we may have only a few channels enabled
so the timestamp may be much earlier in memory than the structure suggests.

Thanks,

J