Re: [PATCH v4 02/11] dt-bindings: spi: Add Aspeed SMC controllers device tree binding

["Cédric Le Goater" <clg@kaod.org>]

Hello Pratyush,

On 3/30/22 21:19, Pratyush Yadav wrote:
> On 25/03/22 11:08AM, Cédric Le Goater wrote:
>> The "interrupt" property is optional because it is only necessary for
>> controllers supporting DMAs (Not implemented yet in the new driver).
>>
>> Cc: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
>> Tested-by: Joel Stanley <joel@jms.id.au>
>> Tested-by: Tao Ren <rentao.bupt@gmail.com>
>> Reviewed-by: Joel Stanley <joel@jms.id.au>
>> Reviewed-by: Rob Herring <robh@kernel.org>
>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>> ---
>>   .../bindings/spi/aspeed,ast2600-fmc.yaml      | 87 +++++++++++++++++++
>>   MAINTAINERS                                   |  9 ++
>>   2 files changed, 96 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml b/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
>> new file mode 100644
>> index 000000000000..e16bbcd38560
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
>> @@ -0,0 +1,87 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/aspeed,ast2600-fmc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Aspeed SMC controllers bindings
>> +
>> +maintainers:
>> +  - Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
>> +  - Cédric Le Goater <clg@kaod.org>
>> +
>> +description: |
>> +  This binding describes the Aspeed Static Memory Controllers (FMC and
>> +  SPI) of the AST2400, AST2500 and AST2600 SOCs.
>> +
>> +allOf:
>> +  - $ref: "spi-controller.yaml#"
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - aspeed,ast2600-fmc
>> +      - aspeed,ast2600-spi
>> +      - aspeed,ast2500-fmc
>> +      - aspeed,ast2500-spi
>> +      - aspeed,ast2400-fmc
>> +      - aspeed,ast2400-spi
>> +
>> +  reg:
>> +    items:
>> +      - description: registers
>> +      - description: memory mapping
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +patternProperties:
>> +  "@[0-9a-f]+":
>> +    type: object
>> +
>> +    properties:
>> +      spi-rx-bus-width:
>> +        enum: [1, 2, 4]
> 
> No need for this. It should already be taken care of by
> spi-peripheral-props.yaml

So we could drop the whole 'patternProperties' section ?

> 
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    #include <dt-bindings/interrupt-controller/aspeed-scu-ic.h>
>> +    #include <dt-bindings/clock/ast2600-clock.h>
>> +
>> +    spi@1e620000 {
>> +        reg = <0x1e620000 0xc4>, <0x20000000 0x10000000>;
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +        compatible = "aspeed,ast2600-fmc";
>> +        clocks = <&syscon ASPEED_CLK_AHB>;
>> +        interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
> 
> Nitpick: Add a blank line here
> 
>> +        flash@0 {
>> +                reg = < 0 >;
>> +                compatible = "jedec,spi-nor";
>> +                spi-max-frequency = <50000000>;
>> +                spi-rx-bus-width = <2>;
>> +        };
> 
> and here
> 
>> +        flash@1 {
>> +                reg = < 1 >;
>> +                compatible = "jedec,spi-nor";
>> +                spi-max-frequency = <50000000>;
>> +                spi-rx-bus-width = <2>;
>> +        };
> 
> and here. Looks a bit nicer.

Thanks for the comments, I will provide the cleanups in v5.

C.



> 
>> +        flash@2 {
>> +                reg = < 2 >;
>> +                compatible = "jedec,spi-nor";
>> +                spi-max-frequency = <50000000>;
>> +                spi-rx-bus-width = <2>;
>> +        };
>> +    };
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index ea9d74b6236f..7d5f81dcd837 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -3021,6 +3021,15 @@ S:	Maintained
>>   F:	Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
>>   F:	drivers/mmc/host/sdhci-of-aspeed*
>>   
>> +ASPEED SMC SPI DRIVER
>> +M:	Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
>> +M:	Cédric Le Goater <clg@kaod.org>
>> +L:	linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
>> +L:	openbmc@lists.ozlabs.org (moderated for non-subscribers)
>> +L:	linux-spi@vger.kernel.org
>> +S:	Maintained
>> +F:	Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
>> +
>>   ASPEED VIDEO ENGINE DRIVER
>>   M:	Eddie James <eajames@linux.ibm.com>
>>   L:	linux-media@vger.kernel.org
>> -- 
>> 2.34.1
>>
>