linux-kernel - Re: [PATCH v2 1/2] gpio: dt-bindings: add parsing of loongson gpio offset

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Message-ID: <20230802-bunkbed-siamese-57ee53bdf273@wendy>
Date:   Wed, 2 Aug 2023 08:50:45 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Yinbo Zhu <zhuyinbo@...ngson.cn>
CC:     Conor Dooley <conor@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Jianmin Lv <lvjianmin@...ngson.cn>,
        <wanghongliang@...ngson.cn>, Liu Peibao <liupeibao@...ngson.cn>,
        <loongson-kernel@...ts.loongnix.cn>
Subject: Re: [PATCH v2 1/2] gpio: dt-bindings: add parsing of loongson gpio
 offset

On Wed, Aug 02, 2023 at 03:44:17PM +0800, Yinbo Zhu wrote:
> 在 2023/8/2 下午3:22, Conor Dooley 写道:
> > On Wed, Aug 02, 2023 at 09:38:34AM +0800, Yinbo Zhu wrote:
> > > 在 2023/8/1 下午11:54, Conor Dooley 写道:
> > > > On Tue, Aug 01, 2023 at 04:34:30PM +0800, Yinbo Zhu wrote:

> > > > > Sorry, I may not have described it clearly before, the ls2k500 was only
> > > > > as a example, actually, Loongson GPIO controllers (2k500,2k1000,eg)come
> > > > > in multiple variants that are compatible except for certain register
> > > > > offset values.  So above all offset device property was used to in all
> > > > > loongson gpio controller.
> > > > 
> > > > But it would be good to know why they are different. Do they each
> > > > support some different features, or was there some other reason for
> > > > making controllers like this?
> > > 
> > > 
> > > There are no other reasons, just differences in these offset addresses.
> > 
> > Huh. Do you have a link to a devicetree for the ls2k500?
> 
> 
> Yes,  there was a link about ls2k500 dts,  but that ls2k500 dts has not
> yet added a gpio node.  this gpio node will be added later.

You must have something that you used to test with, no? I don't mind if
it is not a patch, but rather is some WIP - I'd just like to see user of
the binding :)

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