linux-kernel - Re: [PATCH 1/2] dt-bindings: gpio: brcm: Add bindings for xgs-iproc

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Date:   Tue, 15 Oct 2019 14:23:28 -0500
From:   Rob Herring <robh@...nel.org>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        mark.rutland@....com, rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, f.fainelli@...il.com,
        richard.laing@...iedtelesis.co.nz, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: gpio: brcm: Add bindings for xgs-iproc

On Fri, Oct 04, 2019 at 02:25:24PM +1300, Chris Packham wrote:
> This GPIO controller is present on a number of Broadcom switch ASICs
> with integrated SoCs. It is similar to the nsp-gpio and iproc-gpio
> blocks but different enough to require a separate driver.
> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> ---
>  .../bindings/gpio/brcm,xgs-iproc.txt          | 41 +++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.txt

Please make this a DT schema.

> 
> diff --git a/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.txt b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.txt
> new file mode 100644
> index 000000000000..328b844c82dc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.txt
> @@ -0,0 +1,41 @@
> +Broadcom XGS iProc GPIO controller
> +
> +This controller is the Chip Common A GPIO present on a number of Broadcom
> +switch ASICs with integrated SoCs.
> +
> +Required properties:
> +- compatible:
> +    Must be "brcm,iproc-gpio-cca"
> +
> +- reg:
> +    The first region defines the base I/O address containing
> +    the GPIO controller registers. The second region defines
> +    the I/O address containing the Chip Common A interrupt
> +    registers.
> +
> +Optional properties:
> +
> +- interrupts:
> +    The interrupt shared by all GPIO lines for this controller.
> +
> +- #interrupt-cells:
> +    Should be <2>.  The first cell is the GPIO number, the second should specify
> +    flags.
> +
> +    See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
> +
> +- interrupt-controller:
> +    Marks the device node as an interrupt controller
> +
> +Example:
> +	gpioa: gpio@...00060 {
> +		compatible = "brcm,iproc-gpio-cca";
> +		#gpio-cells = <2>;

Not documented...

> +		reg = <0x18000060 0x50>,
> +		      <0x18000000 0x50>;
> +		ngpios = <12>;

Not documented. 

> +		gpio-controller;

Not documented.

> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
> +	};
> -- 
> 2.23.0
>