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    Subject[PATCH 2/3] dt-bindings: spi: Convert imx cspi to json-schema
    Date
    Convert the i.MX CSPI binding to DT schema format using json-schema,
    update compatible, remove obsolete properties "fsl,spi-num-chipselects"
    and update the example based on latest DT file.

    Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
    ---
    .../devicetree/bindings/spi/fsl-imx-cspi.txt | 56 -------------
    .../devicetree/bindings/spi/fsl-imx-cspi.yaml | 97 ++++++++++++++++++++++
    2 files changed, 97 insertions(+), 56 deletions(-)
    delete mode 100644 Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
    create mode 100644 Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml

    diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
    deleted file mode 100644
    index 33bc58f..0000000
    --- a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
    +++ /dev/null
    @@ -1,56 +0,0 @@
    -* Freescale (Enhanced) Configurable Serial Peripheral Interface
    - (CSPI/eCSPI) for i.MX
    -
    -Required properties:
    -- compatible :
    - - "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1
    - - "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21
    - - "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27
    - - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
    - - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
    - - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
    - - "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc
    - - "fsl,imx8mq-ecspi" for SPI compatible with the one integrated on i.MX8MQ
    - - "fsl,imx8mm-ecspi" for SPI compatible with the one integrated on i.MX8MM
    - - "fsl,imx8mn-ecspi" for SPI compatible with the one integrated on i.MX8MN
    - - "fsl,imx8mp-ecspi" for SPI compatible with the one integrated on i.MX8MP
    -- reg : Offset and length of the register set for the device
    -- interrupts : Should contain CSPI/eCSPI interrupt
    -- clocks : Clock specifiers for both ipg and per clocks.
    -- clock-names : Clock names should include both "ipg" and "per"
    -See the clock consumer binding,
    - Documentation/devicetree/bindings/clock/clock-bindings.txt
    -
    -Recommended properties:
    -- cs-gpios : GPIOs to use as chip selects, see spi-bus.txt. While the native chip
    -select lines can be used, they appear to always generate a pulse between each
    -word of a transfer. Most use cases will require GPIO based chip selects to
    -generate a valid transaction.
    -
    -Optional properties:
    -- num-cs : Number of total chip selects, see spi-bus.txt.
    -- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
    -Documentation/devicetree/bindings/dma/dma.txt.
    -- dma-names: DMA request names, if present, should include "tx" and "rx".
    -- fsl,spi-rdy-drctl: Integer, representing the value of DRCTL, the register
    -controlling the SPI_READY handling. Note that to enable the DRCTL consideration,
    -the SPI_READY mode-flag needs to be set too.
    -Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst).
    -
    -Obsolete properties:
    -- fsl,spi-num-chipselects : Contains the number of the chipselect
    -
    -Example:
    -
    -ecspi@70010000 {
    - #address-cells = <1>;
    - #size-cells = <0>;
    - compatible = "fsl,imx51-ecspi";
    - reg = <0x70010000 0x4000>;
    - interrupts = <36>;
    - cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */
    - <&gpio3 25 0>; /* GPIO3_25 */
    - dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
    - dma-names = "rx", "tx";
    - fsl,spi-rdy-drctl = <1>;
    -};
    diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml
    new file mode 100644
    index 0000000..cac023d
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml
    @@ -0,0 +1,97 @@
    +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    +%YAML 1.2
    +---
    +$id: http://devicetree.org/schemas/spi/fsl-imx-cspi.yaml#
    +$schema: http://devicetree.org/meta-schemas/core.yaml#
    +
    +title: Freescale (Enhanced) Configurable Serial Peripheral Interface (CSPI/eCSPI) for i.MX
    +
    +maintainers:
    + - Shawn Guo <shawn.guo@linaro.org>
    +
    +allOf:
    + - $ref: "/schemas/spi/spi-controller.yaml#"
    +
    +properties:
    + compatible:
    + oneOf:
    + - const: fsl,imx1-cspi
    + - const: fsl,imx21-cspi
    + - const: fsl,imx27-cspi
    + - const: fsl,imx31-cspi
    + - const: fsl,imx35-cspi
    + - const: fsl,imx51-ecspi
    + - const: fsl,imx53-ecspi
    + - items:
    + - enum:
    + - fsl,imx50-ecspi
    + - fsl,imx6q-ecspi
    + - fsl,imx6sx-ecspi
    + - fsl,imx6sl-ecspi
    + - fsl,imx6sll-ecspi
    + - fsl,imx6ul-ecspi
    + - fsl,imx7d-ecspi
    + - fsl,imx8mq-ecspi
    + - fsl,imx8mm-ecspi
    + - fsl,imx8mn-ecspi
    + - fsl,imx8mp-ecspi
    + - const: fsl,imx51-ecspi
    +
    + reg:
    + maxItems: 1
    +
    + interrupts:
    + maxItems: 1
    +
    + clocks:
    + items:
    + - description: SoC SPI ipg clock
    + - description: SoC SPI per clock
    + maxItems: 2
    +
    + clock-names:
    + items:
    + - const: ipg
    + - const: per
    + maxItems: 2
    +
    + dmas:
    + items:
    + - description: DMA controller phandle and request line for RX
    + - description: DMA controller phandle and request line for TX
    +
    + dma-names:
    + items:
    + - const: rx
    + - const: tx
    +
    + fsl,spi-rdy-drctl:
    + $ref: /schemas/types.yaml#/definitions/uint32
    + description: |
    + Integer, representing the value of DRCTL, the register controlling
    + the SPI_READY handling. Note that to enable the DRCTL consideration,
    + the SPI_READY mode-flag needs to be set too.
    + Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst).
    + enum: [0, 1, 2]
    +
    +required:
    + - compatible
    + - reg
    + - interrupts
    + - clocks
    + - clock-names
    +
    +examples:
    + - |
    + #include <dt-bindings/clock/imx5-clock.h>
    +
    + spi@70010000 {
    + #address-cells = <1>;
    + #size-cells = <0>;
    + compatible = "fsl,imx51-ecspi";
    + reg = <0x70010000 0x4000>;
    + interrupts = <36>;
    + clocks = <&clks IMX5_CLK_ECSPI1_IPG_GATE>,
    + <&clks IMX5_CLK_ECSPI1_PER_GATE>;
    + clock-names = "ipg", "per";
    + };
    --
    2.7.4
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