linux-kernel - Re: [PATCH v4 1/2] dt-bindings: edac: al-mc-edac: Amazon's Annapurna Labs Memory Controller EDAC

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Date:   Tue, 22 Oct 2019 11:14:05 +0300
From:   "Shenhar, Talel" <talel@...zon.com>
To:     Rob Herring <robh@...nel.org>
CC:     <maz@...nel.org>, <mark.rutland@....com>, <arnd@...db.de>,
        <bp@...en8.de>, <mchehab@...nel.org>, <james.morse@....com>,
        <davem@...emloft.net>, <gregkh@...uxfoundation.org>,
        <paulmck@...ux.ibm.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-edac@...r.kernel.org>,
        <dwmw@...zon.co.uk>, <benh@...nel.crashing.org>,
        <hhhawa@...zon.com>, <ronenk@...zon.com>, <jonnyc@...zon.com>,
        <hanochu@...zon.com>, <amirkl@...zon.com>, <barakw@...zon.com>
Subject: Re: [PATCH v4 1/2] dt-bindings: edac: al-mc-edac: Amazon's Annapurna
 Labs Memory Controller EDAC

Thanks Rob,

On 10/11/2019 4:29 PM, Rob Herring wrote:
> On Thu, Oct 10, 2019 at 02:54:13PM +0300, Talel Shenhar wrote:
>> Document Amazon's Annapurna Labs Memory Controller EDAC SoC binding.
>>
>> Signed-off-by: Talel Shenhar <talel@...zon.com>
>> ---
>>   .../bindings/edac/amazon,al-mc-edac.yaml           | 50 ++++++++++++++++++++++
>>   1 file changed, 50 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml b/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml
>> new file mode 100644
>> index 00000000..f66b094
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml
>> @@ -0,0 +1,50 @@
>> +# SPDX-License-Identifier: GPL-2.0
> Forgot to mention, please make new bindings (GPL-2.0-only OR BSD-2-Clause).
ack, shall be part of v5
> + interrupts:
>> +    maxItems: 2
>> +    items:
>> +      - description: uncorrectable error interrupt
>> +      - description: correctable error interrupt
>> +
>> +  interrupt-names:
>> +    maxItems: 2
>> +    items:
>> +      - const: ue
>> +      - const: ce
> Now the example fails to build:
>
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.example.dt.yaml:
> edac@...80000: interrupt-names: ['ue'] is too short
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.example.dt.yaml:
> edac@...80000: interrupts: [[20, 4]] is too short
>
> You either need to always have the CE irq or add 'minItems: 1' to both.

Indeed adding the minItems to 1 solves this.

However, shouldn't it really be 0? interrupts are not mandatory?

What is the way to capture this in the new binding?

> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    edac@...80000 {
> +      compatible = "amazon,al-mc-edac";
> +      reg = <0x0 0xf0080000 0x0 0x00010000>;
> +      interrupt-parent = <&amazon_al_system_fabric>;
> +      interrupt-names = "ue";
> +      interrupts = <20 IRQ_TYPE_LEVEL_HIGH>;
> +    };
> -- 
> 2.7.4
>