linux-kernel - Re: [PATCH 4/5] dt-bindings: gpio: convert Atmel GPIO to json-schema

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Date: Mon, 24 Jun 2024 17:22:04 +0100
From: Conor Dooley <conor@...nel.org>
To: Manikandan Muralidharan <manikandan.m@...rochip.com>
Cc: linus.walleij@...aro.org, brgl@...ev.pl, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org,
	nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
	claudiu.beznea@...on.dev, arnd@...db.de,
	durai.manickamkr@...rochip.com, linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Hari.PrasathGE@...rochip.com,
	Balamanikandan.Gunasundar@...rochip.com,
	Nayabbasha.Sayed@...rochip.com, Dharma.B@...rochip.com,
	Varshini.Rajendran@...rochip.com, Balakrishnan.S@...rochip.com,
	Charan.Pedumuru@...rochip.com
Subject: Re: [PATCH 4/5] dt-bindings: gpio: convert Atmel GPIO to json-schema

On Mon, Jun 24, 2024 at 03:34:30PM +0530, Manikandan Muralidharan wrote:
> Convert the Atmel GPIO controller binding document to DT schema format
> using json-schema.

This should mention that there are additional compatible strings added.
> 
> Signed-off-by: Manikandan Muralidharan <manikandan.m@...rochip.com>
> ---
>  .../bindings/gpio/atmel,at91rm9200-gpio.yaml  | 78 +++++++++++++++++++
>  .../devicetree/bindings/gpio/gpio_atmel.txt   | 31 --------
>  2 files changed, 78 insertions(+), 31 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/gpio/atmel,at91rm9200-gpio.yaml
>  delete mode 100644 Documentation/devicetree/bindings/gpio/gpio_atmel.txt
> 
> diff --git a/Documentation/devicetree/bindings/gpio/atmel,at91rm9200-gpio.yaml b/Documentation/devicetree/bindings/gpio/atmel,at91rm9200-gpio.yaml
> new file mode 100644
> index 000000000000..3ace7ba687fc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/atmel,at91rm9200-gpio.yaml
> @@ -0,0 +1,78 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/atmel,at91rm9200-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip GPIO controller (PIO)
> +
> +maintainers:
> +  - Manikandan Muralidharan <manikandan.m@...rochip.com>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - atmel,at91sam9x5-gpio
> +              - microchip,sam9x60-gpio
> +          - const: atmel,at91rm9200-gpio

This is definitely wrong, cos it disallows having
"atmel,at91rm9200-gpio" on it's own.

> +      - items:
> +          - enum:
> +              - microchip,sam9x7-gpio
> +          - const: microchip,sam9x60-gpio
> +          - const: atmel,at91rm9200-gpio
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  "#interrupt-cells":
> +    const: 2
> +
> +  gpio-controller: true
> +  gpio-line-names: true
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  clocks:
> +    maxItems: 1
> +
> +  "#gpio-lines":
> +    description:
> +      Number of gpio, 32 by default if absent

default: 32

> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-controller
> +  - "#interrupt-cells"
> +  - gpio-controller
> +  - "#gpio-cells"
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/at91.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    pioA: gpio@...ff400 {

The label here isn't needed.

Thanks,
Conor.

> +            compatible = "atmel,at91rm9200-gpio";
> +            reg = <0xfffff400 0x200>;
> +            interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
> +            #gpio-cells = <2>;
> +            gpio-controller;
> +            interrupt-controller;
> +            #interrupt-cells = <2>;
> +            clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
> +    };
> +...
> diff --git a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt
> deleted file mode 100644
> index 29416f9c3220..000000000000
> --- a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt
> +++ /dev/null
> @@ -1,31 +0,0 @@
> -* Atmel GPIO controller (PIO)
> -
> -Required properties:
> -- compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5.
> -- reg: Should contain GPIO controller registers location and length
> -- interrupts: Should be the port interrupt shared by all the pins.
> -- #gpio-cells: Should be two.  The first cell is the pin number and
> -  the second cell is used to specify optional parameters to declare if the GPIO
> -  is active high or low. See gpio.txt.
> -- gpio-controller: Marks the device node as a GPIO controller.
> -- interrupt-controller: Marks the device node as an interrupt controller.
> -- #interrupt-cells: Should be two. The first cell is the pin number and the
> -  second cell is used to specify irq type flags, see the two cell description
> -  in interrupt-controller/interrupts.txt for details.
> -
> -optional properties:
> -- #gpio-lines: Number of gpio if absent 32.
> -
> -
> -Example:
> -	pioA: gpio@...ff200 {
> -		compatible = "atmel,at91rm9200-gpio";
> -		reg = <0xfffff200 0x100>;
> -		interrupts = <2 4>;
> -		#gpio-cells = <2>;
> -		gpio-controller;
> -		#gpio-lines = <19>;
> -		interrupt-controller;
> -		#interrupt-cells = <2>;
> -	};
> -
> -- 
> 2.25.1
> 

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