linux-kernel - Re: [PATCH v2 2/9] dt-bindings: fsl,fpga-qixis-i2c: extend support to also cover the LX2160ARDB FPGA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aMmNwurzsaPXDs4t@lizhi-Precision-Tower-5810>
Date: Tue, 16 Sep 2025 12:18:10 -0400
From: Frank Li <Frank.li@....com>
To: Ioana Ciornei <ioana.ciornei@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Shawn Guo <shawnguo@...nel.org>, Michael Walle <mwalle@...nel.org>,
	Lee Jones <lee@...nel.org>, devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/9] dt-bindings: fsl,fpga-qixis-i2c: extend support
 to also cover the LX2160ARDB FPGA

On Mon, Sep 15, 2025 at 03:23:47PM +0300, Ioana Ciornei wrote:

subject:
dt-bindings: fsl,fpga-qixis-i2c: add support for LX2160ARDB FPGA

> Extend the list of supported compatible strings with fsl,lx2160ardb-fpga.
>
> Since the register map exposed by the LX2160ARDB's FPGA also contains
> two GPIO controllers, accept the necessary GPIO pattern property.
> At the same time, add the #address-cells and #size-cells properties as
> valid ones so that the child nodes of the fsl,lx2160ardb-fpga node are
> addressable.
>
> This is needed because when defining child devices such as the GPIO
> controller described in the added example, the child device needs a the
> reg property to properly identify its register location.

These are neccesary because reg of child gpio controller nodes is in I2C
device's address space.

need empty line here.

> Impose this restriction for the new compatible through an if-statement.
>
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> ---
> Changes in v2:
> - Enforce a unit address on the child gpios nodes (remove the ?)
> - Enforce the use of unit addresses by having #address-size and
>   #size-cells only for the newly added fsl,lx2160ardb-fpga compatible
>
>  .../bindings/board/fsl,fpga-qixis-i2c.yaml    | 47 +++++++++++++++++++
>  1 file changed, 47 insertions(+)
>
...

>
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - fsl,lx2160ardb-fpga
> +    then:
> +      required:
> +        - "#address-cells"
> +        - "#size-cells"
> +
       else:
         properties:
           '#address-cells': false
           'size-cells': false

Frank
>  additionalProperties: false
>
>  examples:
> @@ -68,3 +91,27 @@ examples:
>          };
>      };
>
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        board-control@66 {
> +            compatible = "fsl,lx2160ardb-fpga";
> +            reg = <0x66>;
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            gpio@19 {
> +                compatible = "fsl,lx2160ardb-fpga-gpio-sfp";
> +                reg = <0x19>;
> +                gpio-controller;
> +                #gpio-cells = <2>;
> +                gpio-line-names =
> +                    "SFP2_TX_EN", "",
> +                    "", "",
> +                    "SFP2_RX_LOS", "SFP2_TX_FAULT",
> +                    "", "SFP2_MOD_ABS";
> +            };
> +        };
> +    };
> --
> 2.25.1
>