linux-kernel - Re: [PATCH v5 2/8] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY

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Message-ID: <20210714022649.GA1324196@robh.at.kernel.org>
Date:   Tue, 13 Jul 2021 20:26:49 -0600
From:   Rob Herring <robh@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>, linuxarm@...wei.com,
        mauro.chehab@...wei.com, Manivannan Sadhasivam <mani@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org
Subject: Re: [PATCH v5 2/8] dt-bindings: phy: Add bindings for HiKey 970 PCIe
 PHY

On Tue, Jul 13, 2021 at 08:28:35AM +0200, Mauro Carvalho Chehab wrote:
> Document the bindings for HiKey 970 (hi3670) PCIe PHY
> interface, supported via the pcie-kirin driver.

Same comments on this one.

> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  .../phy/hisilicon,phy-hi3670-pcie.yaml        | 101 ++++++++++++++++++
>  1 file changed, 101 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
> new file mode 100644
> index 000000000000..976ab6fe7b0a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
> @@ -0,0 +1,101 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/hisilicon,phy-hi3670-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: HiSilicon Kirin970 PCIe PHY
> +
> +maintainers:
> +  - Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> +
> +description: |+
> +  Bindings for PCIe PHY on HiSilicon Kirin 970.
> +
> +properties:
> +  compatible:
> +    const: hisilicon,hi970-pcie-phy
> +
> +  "#phy-cells":
> +    const: 0
> +
> +  reg:
> +    maxItems: 1
> +    description: PHY Control registers
> +
> +  reg-names:
> +    const: phy
> +
> +  phy-supply:
> +    description: The PCIe PHY power supply
> +
> +  clocks:
> +    items:
> +      - description: PCIe PHY clock
> +      - description: PCIe AUX clock
> +      - description: PCIe APB PHY clock
> +      - description: PCIe APB SYS clock
> +      - description: PCIe ACLK clock
> +
> +  clock-names:
> +    items:
> +      - const: pcie_phy_ref
> +      - const: pcie_aux
> +      - const: pcie_apb_phy
> +      - const: pcie_apb_sys
> +      - const: pcie_aclk
> +
> +  reset-gpios:
> +    description: PCI PERST reset GPIOs
> +    maxItems: 4

Hiding the 4 ports in the phy?

> +
> +  clkreq-gpios:
> +    description: Clock request GPIOs
> +    maxItems: 3
> +
> +  hisilicon,eye-diagram-param:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description: Eye diagram for phy.

Is there a size to this array?

> +
> +required:
> +  - "#phy-cells"
> +  - compatible
> +  - reg
> +  - reg-names
> +  - clocks
> +  - clock-names
> +  - reset-gpios
> +  - clkreq-gpios
> +  - hisilicon,eye-diagram-param
> +  - phy-supply
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/hi3670-clock.h>
> +
> +    bus {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +      pcie_phy: pcie-phy@...00000 {
> +        compatible = "hisilicon,hi970-pcie-phy";
> +        reg = <0x0 0xfc000000 0x0 0x80000>;
> +        reg-names = "phy";
> +        #phy-cells = <0>;
> +        phy-supply = <&ldo33>;
> +        clocks = <&crg_ctrl HI3670_CLK_GATE_PCIEPHY_REF>,
> +                 <&crg_ctrl HI3670_CLK_GATE_PCIEAUX>,
> +                 <&crg_ctrl HI3670_PCLK_GATE_PCIE_PHY>,
> +                 <&crg_ctrl HI3670_PCLK_GATE_PCIE_SYS>,
> +                 <&crg_ctrl HI3670_ACLK_GATE_PCIE>;
> +        clock-names = "pcie_phy_ref", "pcie_aux",
> +                      "pcie_apb_phy", "pcie_apb_sys", "pcie_aclk";
> +        reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
> +                      <&gpio3 1 0 >, <&gpio27 4 0 >;
> +        clkreq-gpios = <&gpio20 6 0 >, <&gpio27 3 0 >, <&gpio17 0 0 >;
> +        hisilicon,eye-diagram-param = <0xFFFFFFFF 0xFFFFFFFF
> +                                       0xFFFFFFFF 0xFFFFFFFF 0xFFFFFFFF>;
> +      };
> +    };
> +...
> -- 
> 2.31.1
> 
>