linux-kernel - Re: [PATCH v2 1/3] dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC

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Date: Sun, 17 Dec 2023 21:16:39 +0800
From: jingbao qiu <qiujingbao.dlmu@...il.com>
To: Conor Dooley <conor@...nel.org>
Cc: a.zummo@...ertech.it, alexandre.belloni@...tlin.com, robh+dt@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, chao.wei@...hgo.com, 
	unicorn_wang@...look.com, paul.walmsley@...ive.com, palmer@...belt.com, 
	aou@...s.berkeley.edu, linux-rtc@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, dlan@...too.org
Subject: Re: [PATCH v2 1/3] dt-bindings: rtc: sophgo: add RTC support for
 Sophgo CV1800 series SoC

On Sun, Dec 17, 2023 at 8:26 PM Conor Dooley <conor@...nel.org> wrote:
>
> On Sun, Dec 17, 2023 at 07:09:50PM +0800, Jingbao Qiu wrote:
>
> > +  reg:
> > +    items:
> > +      - description: data register
> > +      - description: control register
>
> > +    rtc@...5000{
> > +      compatible = "sophgo,cv1800-rtc";
> > +      reg = <0x5025000 0x1000>, <0x5026000 0x1000>;
>
> Why are these two regions rather than just one, given they are located
> next to one another?
> Are they separate on one of the other devices in this family?
>
> Thanks,
> Conor.
>

I think there are two reasons, the first one is to distinguish
different logical ,
REG_ CTRL (base on 0x5025000) controls clock calibration, sleep,and other
functions, RTC_ CORE (base on 0x5026000) has basic RTC functionality,
The second is the maximum address used by RTC_CTRL (base on 0x5025000)
is 0x0ac,which is much smaller than 0x1000. Therefore, the datasheet divides
it into two parts for introduction, and I also divide it into two
parts based on this
introduction.So do you suggest that I merge them together？

Best regards,
Jingbao Qiu






> > +      clocks = <&osc>;
> > +      interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> > +    };
>