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

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Message-ID: <CAN5uoS8GzbFyQq=kjZuxNwBDJ8cn9q-sq8C=VLN5UWWD0HXWaA@mail.gmail.com>
Date:   Tue, 12 May 2020 11:58:50 +0200
From:   Etienne Carriere <etienne.carriere@...aro.org>
To:     Rob Herring <robh+dt@...nel.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

Hello Rob,


On Tue, 12 May 2020 at 03:51, Rob Herring <robh+dt@...nel.org> wrote:
>
> 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.

My apologies. I guess I did not test `dt_binding_check` on this change.
I'll send a v2.

Regards,
Etienne

>
> Rob