linux-kernel - Re: [PATCH 1/5] dt-bindings: Add compatible string opencores,gpio to gpio-mmio

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Message-ID: <20251215-skillet-perceive-2b564a29ed71@spud>
Date: Mon, 15 Dec 2025 16:57:45 +0000
From: Conor Dooley <conor@...nel.org>
To: Stafford Horne <shorne@...il.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Linux OpenRISC <linux-openrisc@...r.kernel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 1/5] dt-bindings: Add compatible string opencores,gpio to
 gpio-mmio

On Sun, Dec 14, 2025 at 06:01:41PM +0000, Stafford Horne wrote:
> In FPGA Development boards with GPIOs we use the opencores gpio verilog
> rtl.  This is compatible with the gpio-mmio.  Add the compatible string
> to allow as below.
> 
> Example:
> 
>         gpio0: gpio@...00000 {
>                 compatible = "opencores,gpio", "brcm,bcm6345-gpio";

What you have done below does not permit this, it only permits
opencores,gpio in isolation.
pw-bot: changes-requested

>                 reg = <0x91000000 0x1>, <0x91000001 0x1>;
>                 reg-names = "dat", "dirout";
>                 gpio-controller;
>                 #gpio-cells = <2>;
>                 status = "okay";
>         };
> 
> Link: https://opencores.org/projects/gpio
> Signed-off-by: Stafford Horne <shorne@...il.com>
> ---
>  Documentation/devicetree/bindings/gpio/gpio-mmio.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml b/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml
> index b4d55bf6a285..0490580df19e 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml
> +++ b/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml
> @@ -23,6 +23,7 @@ properties:
>        - ni,169445-nand-gpio
>        - wd,mbl-gpio # Western Digital MyBook Live memory-mapped GPIO controller
>        - intel,ixp4xx-expansion-bus-mmio-gpio
> +      - opencores,gpio
>  
>    big-endian: true
>  
> -- 
> 2.51.0
> 

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