linux-kernel - Re: [PATCH v10 2/4] dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings

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Message-ID: <20240213223130.GA2504650-robh@kernel.org>
Date: Tue, 13 Feb 2024 16:31:30 -0600
From: Rob Herring <robh@...nel.org>
To: Tanmay Shah <tanmay.shah@....com>
Cc: andersson@...nel.org, devicetree@...r.kernel.org,
	krzysztof.kozlowski+dt@...aro.org, linux-remoteproc@...r.kernel.org,
	michal.simek@....com,
	Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
	ben.levinsky@....com, linux-kernel@...r.kernel.org,
	mathieu.poirier@...aro.org, conor+dt@...nel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v10 2/4] dt-bindings: remoteproc: add Tightly Coupled
 Memory (TCM) bindings

On Tue, Feb 13, 2024 at 02:37:49PM -0600, Tanmay Shah wrote:
> Hello,
> 
> Thanks for reviews please find my comments below.
> 
> On 2/13/24 1:20 PM, Rob Herring wrote:
> > On Tue, 13 Feb 2024 09:54:48 -0800, Tanmay Shah wrote:
> > > From: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> > > 
> > > Introduce bindings for TCM memory address space on AMD-xilinx Zynq
> > > UltraScale+ platform. It will help in defining TCM in device-tree
> > > and make it's access platform agnostic and data-driven.
> > > 
> > > Tightly-coupled memories(TCMs) are low-latency memory that provides
> > > predictable instruction execution and predictable data load/store
> > > timing. Each Cortex-R5F processor contains two 64-bit wide 64 KB memory
> > > banks on the ATCM and BTCM ports, for a total of 128 KB of memory.
> > > 
> > > The TCM resources(reg, reg-names and power-domain) are documented for
> > > each TCM in the R5 node. The reg and reg-names are made as required
> > > properties as we don't want to hardcode TCM addresses for future
> > > platforms and for zu+ legacy implementation will ensure that the
> > > old dts w/o reg/reg-names works and stable ABI is maintained.
> > > 
> > > It also extends the examples for TCM split and lockstep modes.
> > > 
> > > Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
> > > Signed-off-by: Tanmay Shah <tanmay.shah@....com>
> > > ---
> > > 
> > > Changes in v10:
> > >   - modify number of "reg", "reg-names" and "power-domains" entries
> > >     based on cluster mode
> > >   - Add extra optional atcm and btcm in "reg" property for lockstep mode
> > >   - Add "reg-names" for extra optional atcm and btcm for lockstep mode
> > >   - Drop previous Ack as bindings has new change
> > > 
> > > Changes in v9:
> > >   - None
> > > Changes in v8:
> > >   - None
> > > Changes in v7:
> > >   - None
> > > Changes in v6:
> > >   - None
> > > Changes in v5:
> > >   - None
> > > 
> > > Changes in v4:
> > >   - Use address-cells and size-cells value 2
> > >   - Modify ranges property as per new value of address-cells
> > >     and size-cells
> > >   - Modify child node "reg" property accordingly
> > >   - Remove previous ack for further review
> > > 
> > > v4 link: https://lore.kernel.org/all/20230829181900.2561194-2-tanmay.shah@amd.com/
> > > 
> > >  .../remoteproc/xlnx,zynqmp-r5fss.yaml         | 192 ++++++++++++++++--
> > >  1 file changed, 170 insertions(+), 22 deletions(-)
> > > 
> >
> > 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:
> > ./Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml:118:13: [warning] wrong indentation: expected 10 but found 12 (indentation)
> Ack. I will fix this.
> 
> However, can I still get reviews on patch itself so if something else needs to be fixed I can fix in next revision as well.
> 
> Also, I tried to run yamllint with following command:
> 
> make DT_CHECKER_FLAGS=-m dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml O=../build/zynqmp/linux-next/
> 
> 
> However, I see following logs without any error on bindings:
> 
>   LINT    Documentation/devicetree/bindings
> invalid config: unknown option "required" for rule "quoted-strings"
> *xargs: /usr/bin/yamllint: exited with status 255; aborting*
>   CHKDT   Documentation/devicetree/bindings/processed-schema.json
>   SCHEMA  Documentation/devicetree/bindings/processed-schema.json
>   DTEX    Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.example.dts
>   DTC_CHK Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.example.dtb
> 
> I am not sure if my system is missing something but, yamllint tool is failing.

"unknown option" means old version of yamllint.

Rob