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Date: Tue, 15 Nov 2022 14:46:21 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Vladimir Oltean <vladimir.oltean@....com>,
linux-spi@...r.kernel.org
Cc: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Vladimir Oltean <olteanv@...il.com>,
Mark Brown <broonie@...nel.org>,
Kuldeep Singh <singh.kuldeep87k@...il.com>,
Michael Walle <michael@...le.cc>,
Kuldeep Singh <kuldeep.singh@....com>
Subject: Re: [PATCH v2] dt-bindings: spi: convert Freescale DSPI to dt-schema
On 11/11/2022 23:46, Vladimir Oltean wrote:
> From: Kuldeep Singh <kuldeep.singh@....com>
>
> Convert the Freescale DSPI binding to DT schema format.
>
> Signed-off-by: Kuldeep Singh <kuldeep.singh@....com>
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> ---
> v1 (from more than 1 year ago) at:
> https://patchwork.kernel.org/project/spi-devel-general/patch/20210315121518.3710171-1-kuldeep.singh@nxp.com/
>
> .../fsl,spi-fsl-dspi-peripheral-props.yaml | 28 +++++
> .../bindings/spi/fsl,spi-fsl-dspi.yaml | 118 ++++++++++++++++++
> .../devicetree/bindings/spi/spi-fsl-dspi.txt | 65 ----------
> .../bindings/spi/spi-peripheral-props.yaml | 1 +
> MAINTAINERS | 3 +-
> 5 files changed, 149 insertions(+), 66 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi-peripheral-props.yaml
> create mode 100644 Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> delete mode 100644 Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
>
> diff --git a/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi-peripheral-props.yaml
> new file mode 100644
> index 000000000000..d15f77c040d1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi-peripheral-props.yaml
> @@ -0,0 +1,28 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,spi-fsl-dspi-peripheral-props.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Peripheral-specific properties for Freescale DSPI controller
> +
> +maintainers:
> + - Vladimir Oltean <olteanv@...il.com>
> +
> +description:
> + See spi-peripheral-props.yaml for more info.
> +
> +properties:
> + fsl,spi-cs-sck-delay:
> + description:
> + Delay in nanoseconds between activating chip select and the start of
> + clock signal, at the start of a transfer.
> + $ref: /schemas/types.yaml#/definitions/uint32
> +
> + fsl,spi-sck-cs-delay:
> + description:
> + Delay in nanoseconds between stopping the clock signal and
> + deactivating chip select, at the end of a transfer.
> + $ref: /schemas/types.yaml#/definitions/uint32
> +
> +additionalProperties: true
> diff --git a/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> new file mode 100644
> index 000000000000..8a790c0ed95f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
> @@ -0,0 +1,118 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/fsl,spi-fsl-dspi.yaml#
Why second "fsl" in file name? It does not patch compatibles and
duplicates the vendor. We do not have compatibles "nxp,imx6-nxp".
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale DSPI Controller
> +
> +maintainers:
> + - Vladimir Oltean <olteanv@...il.com>
> +
> +allOf:
> + - $ref: "spi-controller.yaml#"
Drop quotes.
> +
> +properties:
> + compatible:
> + description:
> + Some integrations can have a single compatible string containing their
> + SoC name (LS1012A, LS1021A, ...). Others require their SoC compatible
> + string, plus a fallback compatible string (either on LS1021A or on
> + LS2085A).
Why? The fsl,ls1012a-dspi device is either compatible with
fsl,ls1021a-v1.0-dspi or not. It cannot be both - compatible and not
compatible.
> + oneOf:
> + - enum:
> + - fsl,ls1012a-dspi
> + - fsl,ls1021a-v1.0-dspi
> + - fsl,ls1028a-dspi
> + - fsl,ls2085a-dspi
> + - fsl,lx2160a-dspi
> + - fsl,vf610-dspi
> + - items:
> + - enum:
> + - fsl,ls1012a-dspi
> + - fsl,ls1028a-dspi
> + - fsl,ls1043a-dspi
> + - fsl,ls1046a-dspi
> + - fsl,ls1088a-dspi
> + - const: fsl,ls1021a-v1.0-dspi
> + - items:
> + - enum:
> + - fsl,ls2080a-dspi
> + - fsl,lx2160a-dspi
> + - const: fsl,ls2085a-dspi
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: dspi
> +
> + dmas:
> + maxItems: 2
> +
> + dma-names:
> + items:
> + - const: tx
> + - const: rx
> +
> + spi-num-chipselects:
Would be nice to deprecated it in separate patches. There is num-cs
property.
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: Number of available native Chip Select signals
> +
> + bus-num:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: SoC-specific identifier for the SPI controller
> +
> + little-endian: true
> + big-endian: true
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> + - clock-names
> + - spi-num-chipselects
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/fsl,qoriq-clockgen.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + spi@...0000 {
> + compatible = "fsl,ls1028a-dspi", "fsl,ls1021a-v1.0-dspi";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x0 0x2100000 0x0 0x10000>;
reg by convention is a second property.
> + interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> + clock-names = "dspi";
> + clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(2)>;
> + dmas = <&edma0 0 62>, <&edma0 0 60>;
> + dma-names = "tx", "rx";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_dspi0_1>;
> + spi-num-chipselects = <4>;
> + little-endian;
> +
> + flash@0 {
> + compatible = "jedec,spi-nor";
> + spi-max-frequency = <10000000>;
> + fsl,spi-cs-sck-delay = <100>;
> + fsl,spi-sck-cs-delay = <100>;
> + reg = <0>;
Ditto.
> + };
> + };
> + };
> diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
> deleted file mode 100644
(...)
> diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> index dca677f9e1b9..a475e757f8da 100644
> --- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> +++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> @@ -101,6 +101,7 @@ properties:
> # The controller specific properties go here.
> allOf:
> - $ref: cdns,qspi-nor-peripheral-props.yaml#
> + - $ref: fsl,spi-fsl-dspi-peripheral-props.yaml#
> - $ref: samsung,spi-peripheral-props.yaml#
> - $ref: nvidia,tegra210-quad-peripheral-props.yaml#
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c242098a34f9..c75ae49c85b5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -8160,7 +8160,8 @@ FREESCALE DSPI DRIVER
> M: Vladimir Oltean <olteanv@...il.com>
> L: linux-spi@...r.kernel.org
> S: Maintained
> -F: Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
> +F: Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi.yaml
Instead: Documentation/devicetree/bindings/spi/fsl,spi-fsl-dspi*
Best regards,
Krzysztof
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