[PATCH] ARM: dts: aspeed: Add device tree for Ampere's Mt. Jefferson BMC

[Chanh Nguyen]

On 15/10/2024 07:44, Andrew Jeffery wrote:
> Hi Chanh,
> 
> On Mon, 2024-10-14 at 09:05 -0500, Rob Herring (Arm) wrote:
>> On Mon, 14 Oct 2024 10:50:31 +0000, Chanh Nguyen wrote:
>>> The Mt. Jefferson BMC is an ASPEED AST2600-based BMC for the Mt. Jefferson
>>> hardware reference platform with AmpereOne(TM)M processor.
>>>
>>> Signed-off-by: Chanh Nguyen <chanh at os.amperecomputing.com>
>>> ---
>>>   arch/arm/boot/dts/aspeed/Makefile             |   1 +
>>>   .../aspeed/aspeed-bmc-ampere-mtjefferson.dts  | 646 ++++++++++++++++++
>>>   2 files changed, 647 insertions(+)
>>>   create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjefferson.dts
>>>
>>
>>
>> My bot found new DTB warnings on the .dts files added or changed in this
>> series.
>>
>> Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
>> are fixed by another series. Ultimately, it is up to the platform
>> maintainer whether these warnings are acceptable or not. No need to reply
>> unless the platform maintainer has comments.
>>
>> If you already ran DT checks and didn't see these error(s), then
>> make sure dt-schema is up to date:
>>
>>    pip3 install dtschema --upgrade
>>
>>
>> New warnings running 'make CHECK_DTBS=y aspeed/aspeed-bmc-ampere-mtjefferson.dtb' for 20241014105031.1963079-1-chanh at os.amperecomputing.com:
>>
>> arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjefferson.dtb: /: compatible: 'oneOf' conditional failed, one must be fixed:
>> 	'ampere,mtjefferson-bmc' is not one of ['delta,ahe50dc-bmc', 'facebook,galaxy100-bmc', 'facebook,wedge100-bmc', 'facebook,wedge40-bmc', 'microsoft,olympus-bmc', 'quanta,q71l-bmc', 'tyan,palmetto-bmc', 'yadro,vesnin-bmc']
>> 	'ampere,mtjefferson-bmc' is not one of ['amd,daytonax-bmc', 'amd,ethanolx-bmc', 'ampere,mtjade-bmc', 'aspeed,ast2500-evb', 'asrock,e3c246d4i-bmc', 'asrock,e3c256d4i-bmc', 'asrock,romed8hm3-bmc', 'asrock,spc621d8hm3-bmc', 'asrock,x570d4u-bmc', 'bytedance,g220a-bmc', 'facebook,cmm-bmc', 'facebook,minipack-bmc', 'facebook,tiogapass-bmc', 'facebook,yamp-bmc', 'facebook,yosemitev2-bmc', 'facebook,wedge400-bmc', 'hxt,stardragon4800-rep2-bmc', 'ibm,mihawk-bmc', 'ibm,mowgli-bmc', 'ibm,romulus-bmc', 'ibm,swift-bmc', 'ibm,witherspoon-bmc', 'ingrasys,zaius-bmc', 'inspur,fp5280g2-bmc', 'inspur,nf5280m6-bmc', 'inspur,on5263m5-bmc', 'intel,s2600wf-bmc', 'inventec,lanyang-bmc', 'lenovo,hr630-bmc', 'lenovo,hr855xg2-bmc', 'portwell,neptune-bmc', 'qcom,centriq2400-rep-bmc', 'supermicro,x11spi-bmc', 'tyan,s7106-bmc', 'tyan,s8036-bmc', 'yadro,nicole-bmc', 'yadro,vegman-n110-bmc', 'yadro,vegman-rx20-bmc', 'yadro,vegman-sx20-bmc']
>> 	'ampere,mtjefferson-bmc' is not one of ['ampere,mtmitchell-bmc', 'aspeed,ast2600-evb', 'aspeed,ast2600-evb-a1', 'asus,x4tf-bmc', 'facebook,bletchley-bmc', 'facebook,catalina-bmc', 'facebook,cloudripper-bmc', 'facebook,elbert-bmc', 'facebook,fuji-bmc', 'facebook,greatlakes-bmc', 'facebook,harma-bmc', 'facebook,minerva-cmc', 'facebook,yosemite4-bmc', 'ibm,blueridge-bmc', 'ibm,everest-bmc', 'ibm,fuji-bmc', 'ibm,rainier-bmc', 'ibm,system1-bmc', 'ibm,tacoma-bmc', 'inventec,starscream-bmc', 'inventec,transformer-bmc', 'jabil,rbp-bmc', 'qcom,dc-scm-v1-bmc', 'quanta,s6q-bmc', 'ufispace,ncplite-bmc']
>> 	'aspeed,ast2400' was expected
>> 	'aspeed,ast2500' was expected
>> 	from schema $id: http://devicetree.org/schemas/arm/aspeed/aspeed.yaml#
>>
> 
> This needs to be fixed as pointed out by Krzysztof.
> 

Thank Andrew, I'll update that in patch v2

> *snip*
> 
>> arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjefferson.dtb: /ahb/apb/bus at 1e78a000/i2c at 180/i2c-mux at 70/i2c at 0/psu at 58: failed to match any schema with compatible: ['pmbus']
>> arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjefferson.dtb: /ahb/apb/bus at 1e78a000/i2c at 180/i2c-mux at 70/i2c at 0/psu at 59: failed to match any schema with compatible: ['pmbus']
> 
> These two should also be fixed. The compatible must describe the
> physical device, not the communication/application protocol. It may be
> necessary to add a binding if there's not one already for the device.
> 

Hi Andrew, My device is following the pmbus specification. So I'm using 
the generic pmbus driver 
(https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/hwmon/pmbus/pmbus.c#n237) 
to probe my device. In arch/arm/boot/dts/aspeed/ directory, many boards 
are also using this compatible to probe our devices.

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm/boot/dts/aspeed/aspeed-bmc-lenovo-hr855xg2.dts#n219
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm/boot/dts/aspeed/aspeed-bmc-inventec-transformers.dts#n263
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm/boot/dts/aspeed/aspeed-bmc-tyan-s8036.dts#n260

Andrew, Recently I saw the ASPEED platform's maintainer accept the 
"pmbus" compatible with a warning log. You can see in the below list 
that patches were merged recently.

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=bb3776e564d2190db0ef45609e66f13c60ce5b48
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=28cfb03afcb20a841e96e821ba20870a7c437034
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=36d96827f480e90037d162098061333e279ea35f

Regards,
Chanh Ng


> Andrew
>