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

Document Amazon's Annapurna Labs Memory Controller EDAC SoC binding.

Signed-off-by: Talel Shenhar <talel@amazon.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

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@amazon.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).

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/edac/amazon,al-mc-edac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Amazon's Annapurna Labs Memory Controller EDAC
> +
> +maintainers:
> +  - Talel Shenhar <talel@amazon.com>
> +  - Talel Shenhar <talelshenhar@gmail.com>
> +
> +description: |
> +  EDAC node is defined to describe on-chip error detection and correction for
> +  Amazon's Annapurna Labs Memory Controller.
> +
> +properties:
> +
> +  compatible:
> +    const: amazon,al-mc-edac
> +
> +  reg:
> +    maxItems: 1
> +
> +  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@f0080000: interrupt-names: ['ue'] is too short
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.example.dt.yaml: 
edac@f0080000: interrupts: [[20, 4]] is too short

You either need to always have the CE irq or add 'minItems: 1' to both. 

> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    edac@f0080000 {
> +      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
>

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@amazon.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@f0080000: interrupt-names: ['ue'] is too short
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/edac/amazon,al-mc-edac.example.dt.yaml:
> edac@f0080000: 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@f0080000 {
> +      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
>