linux-kernel - Re: [PATCH v1 2/7] dt-bindings: spi: Add Tegra QSPI device tree binding

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Date:   Wed, 9 Dec 2020 11:26:43 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     thierry.reding@...il.com, jonathanh@...dia.com, broonie@...nel.org,
        linux-spi@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v1 2/7] dt-bindings: spi: Add Tegra QSPI device tree
 binding

On Tue, Dec 01, 2020 at 01:12:43PM -0800, Sowjanya Komatineni wrote:
> This patch adds YAML based device tree binding document for Tegra
> QSPI driver.
> 
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
>  .../devicetree/bindings/spi/nvidia,tegra-qspi.yaml | 77 ++++++++++++++++++++++
>  1 file changed, 77 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/spi/nvidia,tegra-qspi.yaml
> 
> diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra-qspi.yaml b/Documentation/devicetree/bindings/spi/nvidia,tegra-qspi.yaml
> new file mode 100644
> index 0000000..038a085
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/nvidia,tegra-qspi.yaml
> @@ -0,0 +1,77 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/nvidia,tegra-qspi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra Quad SPI Controller
> +
> +maintainers:
> +  - Thierry Reding <thierry.reding@...il.com>
> +  - Jonathan Hunter <jonathanh@...dia.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nvidia,tegra210-qspi
> +      - nvidia,tegra186-qspi
> +      - nvidia,tegra194-qspi
> +
> +  reg:
> +    items:
> +      - description: QSPI registers

Just 'maxItems: 1'

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: qspi

Kind of a pointless name. 

> +
> +  clocks:
> +    maxItems: 1
> +
> +  reset-names:
> +    minItems: 1
> +    items:
> +      - const: qspi

Same here.

> +
> +  resets:
> +    maxItems: 1
> +
> +  dmas:
> +    maxItems: 2
> +
> +  dma-names:
> +    items:
> +      - const: rx
> +      - const: tx
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clock-names
> +  - clocks
> +  - reset-names
> +  - resets
> +
> +additionalProperties: true
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/tegra210-car.h>
> +    #include <dt-bindings/reset/tegra210-car.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    spi@...10000 {
> +            compatible = "nvidia,tegra210-qspi";
> +            reg = <0x70410000 0x1000>;
> +            interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&tegra_car TEGRA210_CLK_QSPI>;
> +            clock-names = "qspi";
> +            resets = <&tegra_car 211>;
> +            reset-names = "qspi";
> +            dmas = <&apbdma 5>, <&apbdma 5>;
> +            dma-names = "rx", "tx";
> +    };
> -- 
> 2.7.4
>