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

From: Chanh Nguyen
Date: Tue Oct 15 2024 - 02:39:47 EST




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@xxxxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxxxxxxxxxxx:

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@1e78a000/i2c@180/i2c-mux@70/i2c@0/psu@58: failed to match any schema with compatible: ['pmbus']
arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtjefferson.dtb: /ahb/apb/bus@1e78a000/i2c@180/i2c-mux@70/i2c@0/psu@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