linux-kernel - Re: [PATCH v3 3/4] dt-bindings: Add post-init-providers property

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Date: Thu, 22 Feb 2024 10:07:50 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Saravana Kannan <saravanak@...gle.com>, Rob Herring <robh@...nel.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
 Rob Herring <robh+dt@...nel.org>, Daniel Scally <djrscally@...il.com>,
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>, kernel-team@...roid.com,
 linux-efi@...r.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
 devicetree@...r.kernel.org, Frank Rowand <frowand.list@...il.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-acpi@...r.kernel.org,
 Conor Dooley <conor+dt@...nel.org>,
 Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [PATCH v3 3/4] dt-bindings: Add post-init-providers property

On 22/02/2024 04:41, Saravana Kannan wrote:
> On Wed, Feb 21, 2024 at 4:23 PM Rob Herring <robh@...nel.org> wrote:
>>
>>
>> On Wed, 21 Feb 2024 15:30:23 -0800, Saravana Kannan wrote:
>>> The post-init-providers property can be used to break a dependency cycle by
>>> marking some provider(s) as a post device initialization provider(s). This
>>> allows an OS to do a better job at ordering initialization and
>>> suspend/resume of the devices in a dependency cycle.
>>>
>>> Signed-off-by: Saravana Kannan <saravanak@...gle.com>
>>> ---
>>>  .../bindings/post-init-providers.yaml         | 105 ++++++++++++++++++
>>>  MAINTAINERS                                   |  13 ++-
>>>  2 files changed, 112 insertions(+), 6 deletions(-)
>>>  create mode 100644 Documentation/devicetree/bindings/post-init-providers.yaml
>>>
>>
>> My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
>> on your patch (DT_CHECKER_FLAGS is new in v5.13):
>>
>> yamllint warnings/errors:
>>
>> dtschema/dtc warnings/errors:
>> Documentation/devicetree/bindings/post-init-providers.example.dtb: /example-0/clock-controller@...0: failed to match any schema with compatible: ['vendor,soc4-gcc', 'vendor,soc1-gcc']
>> Documentation/devicetree/bindings/post-init-providers.example.dtb: /example-0/clock-controller@...0: failed to match any schema with compatible: ['vendor,soc4-gcc', 'vendor,soc1-gcc']
>> Documentation/devicetree/bindings/post-init-providers.example.dtb: /example-0/clock-controller@...0: failed to match any schema with compatible: ['vendor,soc4-dispcc', 'vendor,soc1-dispcc']
>> Documentation/devicetree/bindings/post-init-providers.example.dtb: /example-0/clock-controller@...0: failed to match any schema with compatible: ['vendor,soc4-dispcc', 'vendor,soc1-dispcc']
> 
> I'm assuming it's okay to ignore these warnings about made up
> compatible string names.

No, unfortunately not. I think you need to come with a real example or
just drop compatibles.

BTW, I still don't see any users of this binding.

Best regards,
Krzysztof