linux-kernel - Re: [PATCH v4 0/2] iio: adc: add new ad7380 driver

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Date: Sat, 13 Jan 2024 16:14:03 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org, Rob Herring
 <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 Michael Hennerich <michael.hennerich@...log.com>, Nuno Sá
 <nuno.sa@...log.com>, Liam Girdwood <lgirdwood@...il.com>, Mark Brown
 <broonie@...nel.org>, linux-kernel@...r.kernel.org, Stefan Popa
 <stefan.popa@...log.com>
Subject: Re: [PATCH v4 0/2] iio: adc: add new ad7380 driver

On Wed, 10 Jan 2024 14:28:39 -0600
David Lechner <dlechner@...libre.com> wrote:

> This series is adding a new driver for the Analog Devices Inc. AD7380,
> AD7381, AD7383, and AD7384 ADCs. These chips are part of a family of
> simultaneous sampling SAR ADCs.
> 
> One quirk of these chips is that since they are simultaneous sampling,
> they have multiple SPI data output lines that allow transferring two
> data words (one for each input channel) at the same time. So a new
> generic devicetree binding is added to describe this sort of SPI bus
> configuration.
> 
> To keep things simple, the initial driver implementation only supports
> the 2-channel differential chips listed above. There are also 4-channel
> differential chips and 4-channel single-ended chips in the family that
> can be added later.
> 
> Furthermore, the driver is just implementing basic support for capturing
> data. Additional features like interrupts, CRC, etc. can be added later.
> 
> Also, FYI, this driver will also be used as the base for an upcoming
> series adding AXI SPI Engine offload support for these chips along with
> [1].
> 
> This work is being done by BayLibre and on behalf of Analog Devices Inc.
> hence the maintainers are @analog.com.
> 
> [1]: https://lore.kernel.org/linux-spi/20231204-axi-spi-engine-series-2-v1-0-063672323fce@baylibre.com/
Series applied to the togreg branch of iio.git though that is only pushed
out as testing for now as I'll be rebasing it on rc1 once available.

Jonathan