linux-kernel - RE: [PATCH v2 1/2] dt-bindings: edac: Add bindings for Xilinx ZynqMP OCM

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Date:   Thu, 25 Aug 2022 08:50:15 +0000
From:   "Potthuri, Sai Krishna" <sai.krishna.potthuri@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michal Simek <michal.simek@...inx.com>,
        Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        James Morse <james.morse@....com>,
        Robert Richter <rric@...nel.org>
CC:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "saikrishna12468@...il.com" <saikrishna12468@...il.com>,
        "git (AMD-Xilinx)" <git@....com>,
        Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
Subject: RE: [PATCH v2 1/2] dt-bindings: edac: Add bindings for Xilinx ZynqMP
 OCM

Hi Krzysztof,

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Tuesday, August 23, 2022 6:17 PM
> To: Potthuri, Sai Krishna <sai.krishna.potthuri@....com>; Rob Herring
> <robh+dt@...nel.org>; Krzysztof Kozlowski
> <krzysztof.kozlowski+dt@...aro.org>; Michal Simek
> <michal.simek@...inx.com>; Borislav Petkov <bp@...en8.de>; Mauro
> Carvalho Chehab <mchehab@...nel.org>; Tony Luck <tony.luck@...el.com>;
> James Morse <james.morse@....com>; Robert Richter <rric@...nel.org>
> Cc: devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org; linux-edac@...r.kernel.org;
> saikrishna12468@...il.com; git (AMD-Xilinx) <git@....com>; Shubhrajyoti
> Datta <shubhrajyoti.datta@...inx.com>
> Subject: Re: [PATCH v2 1/2] dt-bindings: edac: Add bindings for Xilinx ZynqMP
> OCM
> 
> On 22/08/2022 14:58, Sai Krishna Potthuri wrote:
> > From: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
> >
> > Add bindings for Xilinx ZynqMP OCM controller.
> >
> > Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
> > Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
> > ---
> >  .../bindings/edac/xlnx,zynqmp-ocmc.yaml       | 45 +++++++++++++++++++
> >  1 file changed, 45 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/edac/xlnx,zynqmp-ocmc.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/edac/xlnx,zynqmp-ocmc.yaml
> > b/Documentation/devicetree/bindings/edac/xlnx,zynqmp-ocmc.yaml
> > new file mode 100644
> > index 000000000000..6389fcb7ed69
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/edac/xlnx,zynqmp-ocmc.yaml
> > @@ -0,0 +1,45 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/edac/xlnx,zynqmp-ocmc.yaml#
> 
> Filename should be based on compatible, so xlnx,zynqmp-ocmc-1.0.yaml
I will fix in v3, Just want to know in case if we have multiple compatibles, 
how to handle such cases?
> 
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xilinx Zynqmp OCM(On-Chip Memory) Controller
> 
> So this is a memory controller, then please put the bindings in the memory-
> controllers directory.
I will fix in v3.
> 
> > +
> > +maintainers:
> > +  - Shubhrajyoti Datta <shubhrajyoti.datta@....com>
> > +  - Sai Krishna Potthuri <sai.krishna.potthuri@....com>
> > +
> > +description: |
> > +  The OCM supports 64-bit wide ECC functionality to detect multi-bit
> > +errors
> > +  and recover from a single-bit memory fault.On a write, if all bytes
> > +are
> > +  being written, the ECC is generated and written into the ECC RAM
> > +along with
> > +  the write-data that is written into the data RAM. If one or more
> > +bytes are
> > +  not written, then the read operation results in an correctable
> > +error or
> > +  uncorrectable error.
> > +
> > +properties:
> > +  compatible:
> > +    const: xlnx,zynqmp-ocmc-1.0
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +
> > +unevaluatedProperties: false
> 
> Instead this should be:
> additionalProperties: false
I will fix in v3.
> 
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    memory-controller@...60000 {
> > +      compatible = "xlnx,zynqmp-ocmc-1.0";
> > +      reg = <0xff960000 0x1000>;
> > +      interrupts = <0 10 IRQ_TYPE_LEVEL_HIGH>;
> 
> What does 0 stand for? I commented about it already.
I will fix in v3.

Regards
Sai krishna
> 
> 
> > +    };
> 
> 
> Best regards,
> Krzysztof