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Date:   Tue, 10 Oct 2023 16:56:24 +0100
From:   Jonathan Cameron <jic23@kernel.org>
To:     David Lechner <dlechner@baylibre.com>
Cc:     linux-iio@vger.kernel.org, linux-staging@lists.linux.dev,
        Michael Hennerich <Michael.Hennerich@analog.com>,
        Nuno =?UTF-8?B?U8Oh?= <nuno.sa@analog.com>,
        Axel Haslam <ahaslam@baylibre.com>,
        Philip Molloy <pmolloy@baylibre.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 10/17] staging: iio: resolver: ad2s1210: convert DOS
 mismatch threshold to event attr
Message-ID: <20231010165624.3c1b1341@jic23-huawei>
In-Reply-To: <20231005-ad2s1210-mainline-v4-10-ec00746840fc@baylibre.com>
References: <20231005-ad2s1210-mainline-v4-0-ec00746840fc@baylibre.com>
        <20231005-ad2s1210-mainline-v4-10-ec00746840fc@baylibre.com>
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On Thu,  5 Oct 2023 19:50:27 -0500
David Lechner <dlechner@baylibre.com> 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@baylibre.com>

Applied,

Thanks,

Jonathan