Re: [PATCH v4 10/17] staging: iio: resolver: ad2s1210: convert DOS mismatch threshold to event attr

[Jonathan Cameron]

On Thu,  5 Oct 2023 19:50:27 -0500
David Lechner <dlechner@xxxxxxxxxxxx> wrote:

> The AD2S1210 has a programmable threshold for the degradation of signal
> (DOS) mismatch fault. This fault is triggered when the difference in
> voltage between the sine and cosine inputs exceeds the threshold. In
> other words, when the magnitude of sine and cosine inputs are equal,
> the AC component of the monitor signal is zero and when the magnitudes
> of the sine and cosine inputs are not equal, the AC component of the
> monitor signal is the difference between the sine and cosine inputs.
> So the fault occurs when the magnitude of the AC component of the
> monitor signal exceeds the DOS mismatch threshold voltage.
> 
> This patch converts the custom device DOS mismatch threshold attribute
> to an event magnitude attribute on the monitor signal channel.
> 
> The attribute now uses millivolts instead of the raw register value in
> accordance with the IIO ABI.
> 
> Emitting the event will be implemented in a later patch.
> 
> Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>

Applied,

Thanks,

Jonathan