Re: Excluded List for "#size-cells" warning

[Stan Johnson <userm57@yahoo.com>]

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Attached are the dtc output files for a PB Lombard and a PB 3400c. If 
you need any other information, please let me know.

Thanks for looking into this.

-Stan Johnson

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On 10/29/25 11:00 AM, Stan Johnson wrote:
> On 10/29/25 1:29 AM, Segher Boessenkool wrote:
>> On Tue, Oct 28, 2025 at 08:17:27PM -0500, Rob Herring wrote:
>>> On Tue, Oct 28, 2025 at 7:05 PM Stan Johnson <userm57@yahoo.com> wrote:
>>>>
>>>> -------- Forwarded Message --------
>>>> Subject: Excluded List for "#size-cells" warning
>>>> Date: Tue, 28 Oct 2025 10:00:25 -0600
>>>> From: Stan Johnson <userm57@yahoo.com>
>>>> To: debian-powerpc@lists.debian.org
>>>> CC: Finn Thain <fthain@linux-m68k.org>, Christophe Leroy
>>>> <christophe.leroy@csgroup.eu>
>>>>
>>>> Hello,
>>>>
>>>> On a PowerBook G3 Pismo running the latest Debian SID, dmesg reports 
>>>> the
>>>> warning shown below. I've also seen the warning on PowerBook Lombard 
>>>> and
>>>> Wallstreet systems. I haven't checked PowerBook 3400c or Kanga.
>>>
>>> Can you send me a dump of the device tree on these systems:
>>>
>>> dtc -O dts /proc/device-tree
> 
> Please see the attached compressed files containing dtc output for a 
> Wallstreet (dtc_wallstreet.txt) and a Pismo (dtc_pismo.txt).
> 
>>>
>>> We've been fixing up these cases such as in commit 7e67ef889c9a
>>> ("powerpc/prom_init: Fixup missing #size-cells on PowerBook6,7")
>>
>> And of course it is perfectly fine for an actual Open Firmware to *not*
>> repeat the defaults.  As the documentation (the main IEEE 1275 thing)
>> says: "A missing “#size-cells” property signifies the default value of
>> one."  There are many other places in OF geared towards this default
>> btw, take for example the "reg" word, that silently assumes your node's
>> #size-cells is 1, and does completely the wrong thing if not.
>>
>> Flattened device trees are a fine thing, but the gratuitous ways it
>> differs from OF, are not.
>>
>>
>> Segher

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