linux-kernel - Re: [PATCH v8 8/8] iio: adc: ad4030: Support common-mode channels with SPI offloading

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Message-ID: <a38f418d-a73e-4f9d-9c58-92566c3db0d4@baylibre.com>
Date: Sat, 7 Feb 2026 12:35:28 -0600
From: David Lechner <dlechner@...libre.com>
To: Marcelo Schmitt <marcelo.schmitt@...log.com>, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Cc: jic23@...nel.org, michael.hennerich@...log.com, nuno.sa@...log.com,
 eblanc@...libre.com, andy@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, corbet@....net, marcelo.schmitt1@...il.com
Subject: Re: [PATCH v8 8/8] iio: adc: ad4030: Support common-mode channels
 with SPI offloading

On 2/6/26 1:02 PM, Marcelo Schmitt wrote:
> AD4030 and similar devices can read common-mode voltage together with
> ADC sample data. When enabled, common-mode voltage data is provided in a
> separate IIO channel since it measures something other than the primary
> ADC input signal and requires separate scaling to convert to voltage
> units. The initial SPI offload support patch for AD4030 only provided
> differential channels. Now, extend the AD4030 driver to also provide
> common-mode IIO channels when setup with SPI offloading capability.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@...log.com>
> ---
Reviewed-by: David Lechner <dlechner@...lible.com>