linux-kernel - Re: [PATCH 1/4] dt-bindings: phy: add binding for the Lantiq VRX200 and ARX300 PCIe PHYs

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Date:   Tue, 2 Jul 2019 17:34:03 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-mips@...r.kernel.org, devicetree@...r.kernel.org,
        John Crispin <john@...ozen.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Paul Burton <paul.burton@...s.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Mark Rutland <mark.rutland@....com>,
        Martin Schiller <ms@....tdt.de>
Subject: Re: [PATCH 1/4] dt-bindings: phy: add binding for the Lantiq VRX200
 and ARX300 PCIe PHYs

On Tue, Jul 2, 2019 at 2:35 PM Martin Blumenstingl
<martin.blumenstingl@...glemail.com> wrote:
>
> Add the bindings for the PCIe PHY on Lantiq VRX200 and ARX300 SoCs.
> The IP block contains settings for the PHY and a PLL.
> The PLL mode is configurable through a dedicated #phy-cell in .dts.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  .../bindings/phy/lantiq,vrx200-pcie-phy.yaml  | 87 +++++++++++++++++++
>  .../dt-bindings/phy/phy-lantiq-vrx200-pcie.h  | 11 +++
>  2 files changed, 98 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/lantiq,vrx200-pcie-phy.yaml
>  create mode 100644 include/dt-bindings/phy/phy-lantiq-vrx200-pcie.h
>
> diff --git a/Documentation/devicetree/bindings/phy/lantiq,vrx200-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/lantiq,vrx200-pcie-phy.yaml
> new file mode 100644
> index 000000000000..b7b222e772d0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/lantiq,vrx200-pcie-phy.yaml
> @@ -0,0 +1,87 @@
> +# SPDX-License-Identifier: GPL-2.0

The preference is (GPL-2.0 OR BSD-2-Clause) for new bindings.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/lantiq,vrx200-pcie-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Lantiq VRX200 and ARX300 PCIe PHY Device Tree Bindings
> +
> +maintainers:
> +  - Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> +
> +properties:
> +  "#phy-cells":
> +    const: 1
> +    description: selects the PHY mode as defined in <dt-bindings/phy/phy-lantiq-vrx200-pcie.h>
> +
> +  compatible:
> +    enum:
> +      - lantiq,vrx200-pcie-phy
> +      - lantiq,arx300-pcie-phy
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PHY module clock
> +      - description: PDI register clock
> +
> +  clock-names:
> +    items:
> +      - const: phy
> +      - const: pdi
> +
> +  resets:
> +    items:
> +      - description: exclusive PHY reset line
> +      - description: shared reset line between the PCIe PHY and PCIe controller
> +
> +  resets-names:
> +    items:
> +      - const: phy
> +      - const: pcie
> +
> +  lantiq,rcu:
> +    maxItems: 1
> +    description: phandle to the RCU syscon

You need to define the type (and drop maxItems):

$ref: /schemas/types.yaml#/definitions/phandle

> +
> +  lantiq,rcu-endian-offset:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: the offset of the endian registers for this PHY instance in the RCU syscon
> +
> +  lantiq,rcu-big-endian-mask:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: the mask to set the PDI (PHY) registers for this PHY instance to big endian
> +
> +required:
> +  - "#phy-cells"
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - resets
> +  - reset-names
> +  - lantiq,rcu
> +  - lantiq,rcu-endian-offset
> +  - lantiq,rcu-big-endian-mask
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    pcie0_phy: phy@...800 {
> +        compatible = "lantiq,vrx200-pcie-phy";
> +        reg = <0x106800 0x100>;
> +        lantiq,rcu = <&rcu0>;
> +        lantiq,rcu-endian-offset = <0x4c>;
> +        lantiq,rcu-big-endian-mask = <0x80>; /* bit 7 */
> +        big-endian;

The example will fail to validate because big-endian is not listed as
a property and you have 'additionalProperties: false'. So you have to
either list big-endian or drop additionalProperties.

Note that the examples are validated against the schema in linux-next now.

Rob