linux-kernel - Re: [PATCH 0/4] iio: adc: ad4695: implement calibration support

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Message-ID: <20240826114650.7c006113@jic23-huawei>
Date: Mon, 26 Aug 2024 11:46:50 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Michael Hennerich <Michael.Hennerich@...log.com>, Nuno Sá
 <nuno.sa@...log.com>, Jonathan Corbet <corbet@....net>,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org
Subject: Re: [PATCH 0/4] iio: adc: ad4695: implement calibration support

On Tue, 20 Aug 2024 10:58:34 -0500
David Lechner <dlechner@...libre.com> wrote:

> This series adds calibration support to the ad4695 driver.
> 
> This has the same "odd" gain and offset registers that are being used
> for calibration as discussed recently in the ad4030 series [1]. So if
> the ranges in the *_available attributes seem a bit big for calibration,
> that is why. The official datasheet explanation for this feature is,
> "The AD4695/AD4696 include offset and gain error correction
> functionality to correct for first-order nonidealities in a full
> [analog front end] signal chain."
> 
> [1]: https://lore.kernel.org/linux-iio/20240814193814.78fe45cc@jic23-huawei/
Series LGTM
Applied to the togreg branch of iio.git and pushed out as testing.
Note I'll be rebasing after the previous pull request (hopefully)
gets picked up by Greg.

Jonathan

> 
> ---
> David Lechner (4):
>       iio: adc: ad4695: add 2nd regmap for 16-bit registers
>       iio: adc: ad4695: implement calibration support
>       doc: iio: ad4695: update for calibration support
>       iio: ABI: document ad4695 new attributes
> 
>  Documentation/ABI/testing/sysfs-bus-iio |   3 +
>  Documentation/iio/ad4695.rst            |   7 +-
>  drivers/iio/adc/ad4695.c                | 242 +++++++++++++++++++++++++++++---
>  3 files changed, 234 insertions(+), 18 deletions(-)
> ---
> base-commit: 0f718e10da81446df0909c9939dff2b77e3b4e95
> change-id: 20240819-ad4695-gain-offset-c748d7addf27
> 
> Best regards,