linux-kernel - Re: [PATCH 0/2] add AD8460 DAC driver

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Message-ID: <CAMknhBHd2XCJH4rgYDq=vbCL5E_tM3FxFPWbNy9PvxLCJL4tcA@mail.gmail.com>
Date: Fri, 10 May 2024 12:30:46 -0500
From: David Lechner <dlechner@...libre.com>
To: Mariel Tinaco <Mariel.Tinaco@...log.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>, 
	Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Michael Hennerich <Michael.Hennerich@...log.com>, Marcelo Schmitt <marcelo.schmitt1@...il.com>, 
	Dimitri Fedrau <dima.fedrau@...il.com>, Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH 0/2] add AD8460 DAC driver

On Fri, May 10, 2024 at 1:42 AM Mariel Tinaco <Mariel.Tinaco@...logcom> wrote:
>
> The AD8460 is a 14-bit, high power +-40V 1A, high-speed DAC,
> with dual digital input modes, programmable supply current and
> fault monitoring and protection settings for output current,
> output voltage and junction temperature.
>
> The fault monitoring and shutdown protection features were
> supported in the earlier versions of the IIO driver but was
> scrapped due to uncertainties if the functionalities belong to
> the IIO driver. However, it would be best to implement it for
> the device's quality of life. I'd like to know if it's better
> suited as a stand-alone HWMON driver.
>
> The following are the configurable and readable parameters
> through SPI that could be implemented on the HWMON driver:
>   * An enable bit to arm/protect the device on overcurrent,
> overvoltage or overtemperature events. The device is shut down
> upon detection.
>   * A configurable range/threshold for voltage, current and
> temperature that raises alarm when exceeded while the device is
> armed.
>   * Flags that can be polled to raise alarm upon detection of
> overcurrent, overvoltage or overtemperature events, and apply
> additional protective measures.
>   * Programmable quiescent current (optional)
>   * Thermal monitoring is done by measuring voltage on TMP pin
> (unlikely to be included)
>

Adding myself to the cc: here since I'm interested to see what
Jonathan (or anyone else) has to say about the fault monitoring.