linux-kernel - Re: [PATCH v2 3/6] dt-bindings: gpio: gpio-cdns: convert to YAML

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Message-ID: <67b1a8d3-e695-4ea6-8405-1a8563cbf5f2@kernel.org>
Date: Mon, 16 Jun 2025 08:05:05 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Harshit Shah <hshah@...ado.com>, 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>, Arnd Bergmann <arnd@...db.de>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
 soc@...ts.linux.dev
Subject: Re: [PATCH v2 3/6] dt-bindings: gpio: gpio-cdns: convert to YAML

On 16/06/2025 06:31, Harshit Shah wrote:
> Convert Cadence family GPIO controller bindings to DT schema.
> 
> Changes during conversion:
>    - update the naming as per the other files.

You made it entirely different than every other file and review.

>    - add gpio maintainers

Not really, you need to find someone interested in that hardware, not
subsystem maintainers.

> 
> Signed-off-by: Harshit Shah <hshah@...ado.com>
> ---
>  .../devicetree/bindings/gpio/cdns,gpio.txt         | 43 ------------
>  .../devicetree/bindings/gpio/gpio-cdns.yaml        | 81 ++++++++++++++++++++++

Previous filename was correct.

>  2 files changed, 81 insertions(+), 43 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/cdns,gpio.txt b/Documentation/devicetree/bindings/gpio/cdns,gpio.txt
> deleted file mode 100644
> index 706ef00f5c64951bb29c79a5541db4397e8b2733..0000000000000000000000000000000000000000
> --- a/Documentation/devicetree/bindings/gpio/cdns,gpio.txt
> +++ /dev/null
> @@ -1,43 +0,0 @@
> -Cadence GPIO controller bindings
> -


...

> diff --git a/Documentation/devicetree/bindings/gpio/gpio-cdns.yaml b/Documentation/devicetree/bindings/gpio/gpio-cdns.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..e71f0137912f88e69fb3fa20f096e1572211591c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-cdns.yaml
> @@ -0,0 +1,81 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/gpio-cdns.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cadence GPIO Controller
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@...aro.org>
> +  - Bartosz Golaszewski <brgl@...ev.pl>
> +
> +properties:
> +  compatible:
> +    const: cdns,gpio-r1p02
> +
> +  reg:
> +    minItems: 1

Why this is min and unconstrained...

> +
> +  clocks:
> +    maxItems: 1

But this is max?

maxItems: 1 in both cases (so clocks are correct, but why writing
similar things entirely different?).

> +
> +  ngpios:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: Number of GPIO lines supported, maximum 32.
> +
> +  gpio-controller: true
> +
> +  "#gpio-cells":
> +    const: 2
> +    description: |
> +      - First cell is the GPIO line number.
> +      - Second cell is flags as defined in <dt-bindings/gpio/gpio.h>,
> +        only GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW supported.
> +
> +  interrupt-controller: true
> +
> +  "#interrupt-cells":
> +    const: 2
> +    description: |
> +      - First cell is the GPIO line number used as IRQ.
> +      - Second cell is the trigger type, as defined in
> +        <dt-bindings/interrupt-controller/irq.h>.
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - gpio-controller
> +  - "#gpio-cells"
> +
> +if:
> +  required: [interrupt-controller]
> +then:
> +  required:
> +    - interrupts
> +    - "#interrupt-cells"

Drop last one, core schema requires it.


Best regards,
Krzysztof