linux-kernel - Re: [PATCH 4/5] dt-bindings: crypto: add documentation for aspeed hace

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Message-ID: <dca283db-0b2e-1fc1-bc76-811c4c918fb5@linaro.org>
Date:   Wed, 1 Jun 2022 09:44:50 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Neal Liu <neal_liu@...eedtech.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Johnny Huang <johnny_huang@...eedtech.com>
Cc:     linux-aspeed@...ts.ozlabs.org, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] dt-bindings: crypto: add documentation for aspeed
 hace

On 01/06/2022 07:42, Neal Liu wrote:
> Add device tree binding documentation for the Aspeed Hash
> and Crypto Engines (HACE) Controller.
> 
> Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
> Signed-off-by: Johnny Huang <johnny_huang@...eedtech.com>
> ---
>  .../bindings/crypto/aspeed,hace.yaml          | 58 +++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/crypto/aspeed,hace.yaml
> 
> diff --git a/Documentation/devicetree/bindings/crypto/aspeed,hace.yaml b/Documentation/devicetree/bindings/crypto/aspeed,hace.yaml
> new file mode 100644
> index 000000000000..36b4ad0dc7fa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/crypto/aspeed,hace.yaml

Filename should be rather from the first compatible, so
"aspeed,ast2500-hace.yaml"

> @@ -0,0 +1,58 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/crypto/aspeed,hace.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ASPEED HACE hash and crypto Hardware Accelerator Device Tree Bindings

s/Device Tree Bindings//

> +
> +maintainers:
> +  - Neal Liu <neal_liu@...eedtech.com>
> +
> +description: |
> +  The Hash and Crypto Engine (HACE) is designed to accelerate the throughput
> +  of hash data digest, encryption, and decryption. Basically, HACE can be
> +  divided into two independently engines - Hash Engine and Crypto Engine.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - aspeed,ast2500-hace
> +      - aspeed,ast2600-hace
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    maxItems: 1

You need to list clock names, however usually it does not make sense to
have names for just one main device clock.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - resets
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/ast2600-clock.h>
> +    hace: hace@...d0000 {

Generic node names so "crypto".

> +        compatible = "aspeed,ast2600-hace";
> +        reg = <0x1e6d0000 0x200>;
> +        interrupts = <4>;
> +        clocks = <&syscon ASPEED_CLK_GATE_YCLK>;
> +        clock-names = "yclk";
> +        resets = <&syscon ASPEED_RESET_HACE>;
> +    };


Best regards,
Krzysztof