linux-kernel - Re: [PATCH v4 03/12] dt-bindings: PCI: Add bindings for more Brcmstb chips

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Date:   Mon, 15 Jun 2020 11:48:48 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jim Quinlan <james.quinlan@...adcom.com>
Cc:     linux-pci@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        bcm-kernel-feedback-list@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 03/12] dt-bindings: PCI: Add bindings for more Brcmstb
 chips

On Fri, Jun 05, 2020 at 05:26:43PM -0400, Jim Quinlan wrote:
> From: Jim Quinlan <jquinlan@...adcom.com>
> 
> - Add compatible strings for three more Broadcom STB chips: 7278, 7216,
>   7211 (STB version of RPi4).
> - add new property 'brcm,scb-sizes'
> - add new property 'resets'
> - add new property 'reset-names' for 7216 only
> - allow 'ranges' and 'dma-ranges' to have more than one item and update
>   the example to show this.
> 
> Signed-off-by: Jim Quinlan <jquinlan@...adcom.com>
> ---
>  .../bindings/pci/brcm,stb-pcie.yaml           | 58 ++++++++++++++++---
>  1 file changed, 51 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> index 8680a0f86c5a..4a012d77513f 100644
> --- a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> @@ -9,12 +9,15 @@ title: Brcmstb PCIe Host Controller Device Tree Bindings
>  maintainers:
>    - Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
>  
> -allOf:
> -  - $ref: /schemas/pci/pci-bus.yaml#
> -
>  properties:
>    compatible:
> -    const: brcm,bcm2711-pcie # The Raspberry Pi 4
> +    items:
> +      - enum:
> +          - brcm,bcm2711-pcie # The Raspberry Pi 4
> +          - brcm,bcm7211-pcie # Broadcom STB version of RPi4
> +          - brcm,bcm7278-pcie # Broadcom 7278 Arm
> +          - brcm,bcm7216-pcie # Broadcom 7216 Arm
> +          - brcm,bcm7445-pcie # Broadcom 7445 Arm
>  
>    reg:
>      maxItems: 1
> @@ -34,10 +37,12 @@ properties:
>        - const: msi
>  
>    ranges:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 4
>  
>    dma-ranges:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 6
>  
>    clocks:
>      maxItems: 1
> @@ -58,8 +63,33 @@ properties:
>  
>    aspm-no-l0s: true
>  
> +  resets:
> +    description: for "brcm,bcm7216-pcie", must be a valid reset
> +      phandle pointing to the RESCAL reset controller provider node.
> +    $ref: "/schemas/types.yaml#/definitions/phandle"
> +
> +  reset-names:
> +    items:
> +      - const: rescal
> +
> +  brcm,scb-sizes:
> +    description: u64 giving the 64bit PCIe memory
> +      viewport size of a memory controller.  There may be up to
> +      three controllers, and each size must be a power of two
> +      with a size greater or equal to the amount of memory the
> +      controller supports.  Note that each memory controller
> +      may have two component regions -- base and extended -- so
> +      this information cannot be deduced from the dma-ranges.
> +
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint64-array
> +      - items:
> +          minItems: 1
> +          maxItems: 3

This can be (dropping 'allOf'):

$ref: /schemas/types.yaml#/definitions/uint64-array
minItems: 1
maxItems: 3

With that,

Reviewed-by: Rob Herring <robh@...nel.org>