linux-kernel - Re: [PATCH v3 1/2] dt-bindings: gpio: brcm: Add bindings for xgs-iproc

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Message-ID: <db6d6cc7-6844-7079-7115-da1eb9c1feac@broadcom.com>
Date:   Thu, 24 Oct 2019 09:39:27 -0700
From:   Scott Branden <scott.branden@...adcom.com>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        robh+dt@...nel.org, mark.rutland@....com, rjui@...adcom.com,
        sbranden@...adcom.com, bcm-kernel-feedback-list@...adcom.com
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: gpio: brcm: Add bindings for
 xgs-iproc

Hi Chris,

On 2019-10-23 5:48 p.m., 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>
> ---
>
> Notes:
>      Changes in v3:
>      - incorporate review comments from Rob and Bart
>      
>      Changes in v2:
>      - Document as DT schema
>      - Include ngpios, #gpio-cells and gpio-controller properties
>
>   .../bindings/gpio/brcm,xgs-iproc.yaml         | 70 +++++++++++++++++++
>   1 file changed, 70 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.yaml
>
> diff --git a/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.yaml b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.yaml
> new file mode 100644
> index 000000000000..ec1fd3a64aa2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.yaml
This doc needs to have gpio in the name to make all other gpio binding 
documents.
ie.
brcm,xgs-iproc-gpio.yaml.
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/brcm,xgs-iproc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom XGS iProc GPIO controller
> +
> +maintainers:
> +  - Chris Packham <chris.packham@...iedtelesis.co.nz>
> +
> +description: |
> +  This controller is the Chip Common A GPIO present on a number of Broadcom
> +  switch ASICs with integrated SoCs.
> +
> +properties:
> +  compatible:
> +    const: brcm,iproc-gpio-cca
> +
> +  reg:
> +    items:
> +      - description: the I/O address containing the GPIO controller
> +                     registers.
> +      - description: the I/O address containing the Chip Common A interrupt
> +                     registers.
> +
> +  gpio-controller: true
> +
> +  '#gpio-cells':
> +      const: 2
> +
> +  ngpios:
> +    minimum: 0
> +    maximum: 32
> +
> +  interrupt-controller: true
> +
> +  '#interrupt-cells':
> +    const: 2
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#gpio-cells"
> +  - gpio-controller
> +
> +dependencies:
> +  interrupt-controller: [ interrupts ]
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    gpio@...00060 {
> +        compatible = "brcm,iproc-gpio-cca";
> +        #gpio-cells = <2>;
> +        reg = <0x18000060 0x50>,
> +              <0x18000000 0x50>;
> +        ngpios = <12>;
> +        gpio-controller;
> +        interrupt-controller;
> +        #interrupt-cells = <2>;
> +        interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
> +    };
> +
> +
> +...