linux-kernel - Re: [PATCH v3 1/2] drivers: rtc: add max313xx series rtc driver

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Date:   Mon, 13 Mar 2023 02:15:26 +0000
From:   Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To:     "Tilki, Ibrahim" <Ibrahim.Tilki@...log.com>,
        "a.zummo@...ertech.it" <a.zummo@...ertech.it>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "jdelvare@...e.com" <jdelvare@...e.com>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
CC:     "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "Arslanbenzer, Zeynep" <Zeynep.Arslanbenzer@...log.com>
Subject: Re: [PATCH v3 1/2] drivers: rtc: add max313xx series rtc driver

Hi Ibrahim,

On 18/02/23 04:17, Tilki, Ibrahim wrote:
>> Hi Ibrahim,
>>
>> On 9/11/22 01:22, Ibrahim Tilki wrote:
>>> Adding support for Analog Devices MAX313XX series RTCs.
>>>
>>> Signed-off-by: Ibrahim Tilki <Ibrahim.Tilki@...log.com>
>>> Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
>>> ---
>>>    drivers/rtc/Kconfig        |   11 +
>>>    drivers/rtc/Makefile       |    1 +
>>>    drivers/rtc/rtc-max313xx.c | 1070 ++++++++++++++++++++++++++++++++++++
>>>    3 files changed, 1082 insertions(+)
>>>    create mode 100644 drivers/rtc/rtc-max313xx.c
>> What is the current state of this work? I see there are some comments on
>> this v3 iteration from late last year and I couldn't find any newer
>> iteration on any mailing list. We've got some new hardware arriving soon
>> that will have the MAX31331 RTC and I'm keen to see this patch series
>> land. Is there anything I can do to help it along? I can't be very
>> specific about when I'll see the new hardware (who can these days), the
>> last update was "boards are due in March".
>>
>> For the maintainers on the Cc list once the dust settles how would I get
>> this supported in a LTS kernel (we're currently using the 5.15 series)?
>> Or is totally out of the question because it's not just a new device id?
> Hi Chris,
>
> Patch v4 is on the way, I will be sending it in a few weeks.
> It is hard to tell when it is going to land but I expect to be more responsive
> to reviews after patch v4.

FYI I've now got some boards with a MAX31331. I've given v3 a quick test 
and it works for me.

Are you also looking at a u-boot driver? If not I can port your driver 
across reasonably easily.