From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Kirill Kapranov <kirill.kapranov@compulab.co.il>
Cc: a.zummo@towertech.it, phdm@macqel.be, linux-rtc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] rtc:abx80x: Enable distributed digital calibration
Date: Sun, 28 Mar 2021 23:14:03 +0200 [thread overview]
Message-ID: <YGDxm/zJSETUMY4B@piout.net> (raw)
In-Reply-To: <20210328210232.10395-1-kirill.kapranov@compulab.co.il>
Hello,
Thank you for working on that!
On 29/03/2021 00:02:28+0300, Kirill Kapranov wrote:
> This patch series enables a Distributed Digital Calibration function for
> the RTC of the family. This feature allows to improve the RTC accuracy by
> means of compensation an XT oscillator drift. To learn more, see:
> AB08XX Series Ultra Low Power RTC IC User's Guide
> https://abracon.com/realtimeclock/AB08XX-Application-Manual.pdf
>
> The patches 1 and 2 enable SQW output, that is necessary for subsequent
> measurement and computation. However, this feature may be enabled and used
> independently, as is.
>
Please use the common clock framework for this part. You will need a
dummy userspace user for this to work but I know Stephen is open to that
as we discussed that use case multiple times already.
> The patches 3 and 4 enable the XT calibration feature per se. The SQW
> output must be enabled for usage of this feature.
Please use the .set_offset and .get_offset rtc_ops for this part.
--
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
prev parent reply other threads:[~2021-03-28 21:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-28 21:02 [PATCH 0/4] rtc:abx80x: Enable distributed digital calibration Kirill Kapranov
2021-03-28 21:02 ` [PATCH 1/4] dt-bindings: rtc: abracon,abx80x: Add sqw property Kirill Kapranov
2021-03-28 21:02 ` [PATCH 2/4] rtc: abx80x: Enable SQW output Kirill Kapranov
2021-03-29 0:34 ` kernel test robot
2021-03-29 0:34 ` kernel test robot
2021-03-29 6:19 ` Dan Carpenter
2021-03-29 6:19 ` Dan Carpenter
2021-03-29 6:19 ` Dan Carpenter
2021-03-30 15:28 ` Kirill Kapranov
2021-03-30 15:28 ` Kirill Kapranov
2021-03-28 21:02 ` [PATCH 3/4] dt-bindings: rtc: abracon,abx80x: Add xt-frequency property Kirill Kapranov
2021-03-28 21:02 ` [PATCH 4/4] rtc:abx80x: Enable xt digital calibration Kirill Kapranov
2021-04-09 10:46 ` Pavel Machek
2021-04-09 16:56 ` Kirill Kapranov
2021-03-28 21:14 ` Alexandre Belloni [this message]
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