linux-kernel - Re: [PATCH v2] ARM: dts: aspeed: tyan-s7106: Update nct7802 config

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Date:   Thu, 4 Nov 2021 21:46:57 -0400
From:   Oskar Senft <osk@...gle.com>
To:     Joel Stanley <joel@....id.au>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed <linux-aspeed@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andrew Jeffery <andrew@...id.au>
Subject: Re: [PATCH v2] ARM: dts: aspeed: tyan-s7106: Update nct7802 config

Hi Joel

Oh man, this is embarrassing!

> I applied this and tried comple testing, and got this warning:
>
>   DTC     arch/arm/boot/dts/aspeed-bmc-tyan-s7106.dtb
> ../arch/arm/boot/dts/aspeed-bmc-tyan-s7106.dts:217.4-14: Warning
> (reg_format): /ahb/apb/bus@...8a000/i2c-bus@...nct7802@...channel@0:reg:
> property has invalid length (4 bytes) (#address-cells == 2,
> #size-cells == 1)
> [...]
> You need to add this to the nct node:
>
> #address-cells = <1>;
> #size-cells = <0>;
Oh yeah, of course. It's even in the example in the binding that I wrote.

> Did you see this with your testing? I'm building on top of v5.15 and
> my distro's dtc is 1.6.0.
I built (as part of OpenBMC) and ran (on actual HW), but these
warnings don't make it out to the console. In my "defense", I did run
checkpatch.pl, though.

Is there an easy way for me to see these types of warnings? Or should
they really come out as errors?

I'll fix and send a PATCH v3.

I'm really sorry, this shouldn't be so much work for you!

Oskar.