Re: [PATCH v2 2/3] iio: industrialio-backend: support backend capabilities

[Andy Shevchenko <andriy.shevchenko@intel.com>]

On Tue, Jan 13, 2026 at 12:12:48PM +0000, Tomas Melin wrote:
> Not all backends support the full set of capabilities provided by the
> industrialio-backend framework. Capability bits can be used in frontends
> and backends for checking for a certain feature set, or if using
> related functions can be expected to fail.
> 
> Capability bits should be set by a compatible backend and provided when
> registering the backend.

...

> struct iio_backend {

>  	u8 idx;
> +	u32 caps;

Please, run `pahole` to see if there is a better place for a new member.
(I bet there is.)

>  };

...

> +enum iio_backend_capabilities {
> +	IIO_BACKEND_CAP_TEST_PATTERNS = BIT(0),
> +	IIO_BACKEND_CAP_BUFFERING = BIT(1),
> +	IIO_BACKEND_CAP_CALIBRATION = BIT(2)

Add trailing comma, it will allow to avoid unneeded churn in the future.

> +};


-- 
With Best Regards,
Andy Shevchenko