linux-kernel - Re: [PATCH v2 1/2] dt-bindings: gpio: add SAMA5D2 PIOBU support

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Date:   Tue, 4 Dec 2018 09:58:10 +0000
From:   <Andrei.Stefanescu@...rochip.com>
To:     <robh+dt@...nel.org>
CC:     <linus.walleij@...aro.org>, <gregkh@...uxfoundation.org>,
        <Nicolas.Ferre@...rochip.com>, <mark.rutland@....com>,
        <Ludovic.Desroches@...rochip.com>, <Cristian.Birsan@...rochip.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: gpio: add SAMA5D2 PIOBU support

Hello Rob,

Could you please tell me if there are any improvements
to be made to the patch?

Best regards,
Andrei

On 20.11.2018 10:08, Andrei Stefanescu - M50506 wrote:
> This patch describes the compatible and the device tree
> bindings necessary for the SAMA5D2 PIOBU GPIO.
>
> Signed-off-by: Andrei Stefanescu <andrei.stefanescu@...rochip.com>
> ---
>   .../bindings/gpio/gpio-sama5d2-piobu.txt           | 31 ++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt b/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
> new file mode 100644
> index 0000000..2e260e1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
> @@ -0,0 +1,31 @@
> +GPIO controller for SAMA5D2 PIOBU pins.
> +
> +These pins have the property of not losing their voltage
> +during Backup/Self-refresh mode.
> +
> +These bindings should be set to a node in the dtsi file.
> +
> +Required properties:
> +- compatible:		"syscon", "microchip,sama5d2-piobu"
> +- #gpio-cells:		There are 2. The pin number is the
> +			first, the second represents additional
> +			parameters such as GPIO_ACTIVE_HIGH/LOW.
> +- gpio-controller:	Marks the port as GPIO controller.
> +
> +Note that the driver uses syscon and should be the child of
> +the syscon node.
> +
> +Example:
> +
> +	secumod@...40000 {
> +		compatible = "atmel,sama5d2-secumod", "syscon", "simple-mfd";
> +		status = "okay";
> +		reg = <0xfc040000 0x100>;
> +
> +		pioBU: piobu {
> +			status = "okay";
> +			compatible = "microchip,sama5d2-piobu";
> +			gpio-controller;
> +			#gpio-cells = <2>;
> +		};
> +	};