linux-kernel - Re: [PATCH] dt-bindings: nvmem: stm32: new property for data access

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Date:   Mon, 11 May 2020 20:51:19 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Etienne Carriere <etienne.carriere@...aro.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-stm32@...md-mailman.stormreply.com,
        devicetree@...r.kernel.org,
        Fabrice Gasnier <fabrice.gasnier@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Etienne Carriere <etienne.carriere@...com>
Subject: Re: [PATCH] dt-bindings: nvmem: stm32: new property for data access

On Fri, May 8, 2020 at 8:47 AM Etienne Carriere
<etienne.carriere@...aro.org> wrote:
>
> From: Etienne Carriere <etienne.carriere@...com>
>
> Introduce boolean property st,non-secure-otp for OTP data located
> in a factory programmed area that only secure firmware can access
> by default and that shall be reachable from the non-secure world.
>
> Signed-off-by: Etienne Carriere <etienne.carriere@...com>
> ---
>  .../bindings/nvmem/st,stm32-romem.yaml          | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
> index d84deb4774a4..c11c99f085d7 100644
> --- a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
> +++ b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
> @@ -24,6 +24,18 @@ properties:
>        - st,stm32f4-otp
>        - st,stm32mp15-bsec
>
> +patternProperties:
> +  "^.*@[0-9a-f]+$":
> +    type: object
> +
> +    properties:
> +      st,non-secure-otp:
> +        description: |
> +          This property explicits a factory programmed area that both secure
> +          and non-secure worlds can access. It is needed when, by default, the
> +          related area can only be reached by the secure world.
> +        type: boolean
> +
>  required:
>    - "#address-cells"
>    - "#size-cells"
> @@ -41,6 +53,11 @@ examples:
>        calib@22c {
>          reg = <0x22c 0x2>;
>        };
> +
> +      mac_addr@e4 {
> +        reg = <0xe4 0x8>;
> +        st,non-secure-otp;

This fails validation. You need to drop 'additionalProperties' in nvmem.yaml.

Rob