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

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Date:   Mon, 13 Mar 2023 03:20:17 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc:     "Tilki, Ibrahim" <Ibrahim.Tilki@...log.com>,
        "a.zummo@...ertech.it" <a.zummo@...ertech.it>,
        "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>,
        "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

Hello,

On 13/03/2023 02:15:26+0000, Chris Packham wrote:
> 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.
> 

I'm curious why would you need an RTC driver for u-boot?


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com