linux-kernel - Re: [EXT] Re: [PATCH v3 2/5] dt-bindings: arm: fsl: add imx-se-fw binding doc

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Message-ID: <20240618-antonym-tabloid-8f721ee752a5@wendy>
Date: Tue, 18 Jun 2024 12:19:53 +0100
From: Conor Dooley <conor.dooley@...rochip.com>
To: Pankaj Gupta <pankaj.gupta@....com>
CC: Conor Dooley <conor@...nel.org>, Jonathan Corbet <corbet@....net>, Rob
 Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor
 Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
	<s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [EXT] Re: [PATCH v3 2/5] dt-bindings: arm: fsl: add imx-se-fw
 binding doc

On Tue, Jun 18, 2024 at 10:58:47AM +0000, Pankaj Gupta wrote:
> > From: Conor Dooley <conor@...nel.org>
> > On Mon, Jun 17, 2024 at 12:59:40PM +0530, Pankaj Gupta wrote:
> > > The NXP security hardware IP(s) like: i.MX EdgeLock Enclave, V2X etc.,
> > > creates an embedded secure enclave within the SoC boundary to enable
> > > features like:
> > > - HSM
> > > - SHE
> > > - V2X
> > >
> > > Secure-Enclave(s) communication interface are typically via message
> > > unit, i.e., based on mailbox linux kernel driver. This driver enables
> > > communication ensuring well defined message sequence protocol between
> > > Application Core and enclave's firmware.
> > >
> > > Driver configures multiple misc-device on the MU, for multiple
> > > user-space applications, to be able to communicate over single MU.
> > >
> > > It exists on some i.MX processors. e.g. i.MX8ULP, i.MX93 etc.
> > >
> > > Signed-off-by: Pankaj Gupta <pankaj.gupta@....com>
> > > ---
> > >  .../devicetree/bindings/firmware/fsl,imx-se.yaml   | 160
> > +++++++++++++++++++++
> > >  1 file changed, 160 insertions(+)
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml
> > > b/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml
> > > new file mode 100644
> > > index 000000000000..60ad1c4a3dfa
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/firmware/fsl,imx-se.yaml
> > > @@ -0,0 +1,160 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/firmware/fsl,imx-se.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: NXP i.MX HW Secure Enclave(s) EdgeLock Enclave
> > > +
> > > +maintainers:
> > > +  - Pankaj Gupta <pankaj.gupta@....com>
> > > +
> > > +description: |
> > > +  NXP's SoC may contain one or multiple embedded secure-enclave HW
> > > +  IP(s) like i.MX EdgeLock Enclave, V2X etc. These NXP's HW IP(s)
> > > +  enables features like
> > > +    - Hardware Security Module (HSM),
> > > +    - Security Hardware Extension (SHE), and
> > > +    - Vehicular to Anything (V2X)
> > > +
> > > +  Communication interface to the secure-enclaves is based on the
> > > + messaging unit(s).
> > > +
> > > +properties:
> > > +  $nodename:
> > > +    pattern: "^[0-9a-z]*-if@[0-9a-f]+$"
> > 
> > Just "firmware@<hex>" please.
> > 
> 
> Modified as per your suggestion, 
> -    pattern: "^[0-9a-z]*-if@[0-9a-f]+$"
> +    pattern: "^[0-9a-z]*-if@<hex>"

Firstly, that's not even what I said verbatim, which I could
understand. <hex> isn't even a valid bit of regex for this. 
What I want to see is something like: "^firmware@[0-9a-f]+$"

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