Unverified Commit 28b5eaf9 authored by Kuldeep Singh's avatar Kuldeep Singh Committed by Mark Brown
Browse files

spi: Convert NXP flexspi to json schema 



Convert the NXP FlexSPI binding to DT schema format using json-schema.

Signed-off-by: default avatarKuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210927105818.445675-1-kuldeep.singh@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b59c1224

Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt

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* NXP Flex Serial Peripheral Interface (FSPI)



Required properties:

  - compatible : Should be "nxp,lx2160a-fspi"

			    "nxp,imx8qxp-fspi"

			    "nxp,imx8mm-fspi"

			    "nxp,imx8mp-fspi"

			    "nxp,imx8dxl-fspi"



  - reg :        First contains the register location and length,

                 Second contains the memory mapping address and length

  - reg-names :  Should contain the resource reg names:

	         - fspi_base: configuration register address space

                 - fspi_mmap: memory mapped address space

  - interrupts : Should contain the interrupt for the device



Required SPI slave node properties:

  - reg :        There are two buses (A and B) with two chip selects each.

                 This encodes to which bus and CS the flash is connected:

                 - <0>: Bus A, CS 0

                 - <1>: Bus A, CS 1

                 - <2>: Bus B, CS 0

                 - <3>: Bus B, CS 1



Example showing the usage of two SPI NOR slave devices on bus A:



fspi0: spi@20c0000 {

	compatible = "nxp,lx2160a-fspi";

	reg = <0x0 0x20c0000 0x0 0x10000>, <0x0 0x20000000 0x0 0x10000000>;

	reg-names = "fspi_base", "fspi_mmap";

	interrupts = <0 25 0x4>; /* Level high type */

	clocks = <&clockgen 4 3>, <&clockgen 4 3>;

	clock-names = "fspi_en", "fspi";



	mt35xu512aba0: flash@0 {

		reg = <0>;

		....

	};



	mt35xu512aba1: flash@1 {

		reg = <1>;

		....

	};

};

Documentation/devicetree/bindings/spi/spi-nxp-fspi.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/spi/spi-nxp-fspi.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: NXP Flex Serial Peripheral Interface (FSPI)



maintainers:

  - Kuldeep Singh <kuldeep.singh@nxp.com>



allOf:

  - $ref: "spi-controller.yaml#"



properties:

  compatible:

    enum:

      - nxp,imx8dxl-fspi

      - nxp,imx8mm-fspi

      - nxp,imx8mp-fspi

      - nxp,imx8qxp-fspi

      - nxp,lx2160a-fspi



  reg:

    items:

      - description: registers address space

      - description: memory mapped address space



  reg-names:

    items:

      - const: fspi_base

      - const: fspi_mmap



  interrupts:

    maxItems: 1



  clocks:

    items:

      - description: SPI bus clock

      - description: SPI serial clock



  clock-names:

    items:

      - const: fspi_en

      - const: fspi



required:

  - compatible

  - reg

  - reg-names

  - interrupts

  - clocks

  - clock-names



unevaluatedProperties: false



examples:

  - |

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/clock/fsl,qoriq-clockgen.h>



    soc {

        #address-cells = <2>;

        #size-cells = <2>;



        spi@20c0000 {

            compatible = "nxp,lx2160a-fspi";

            reg = <0x0 0x20c0000 0x0 0x100000>,

                  <0x0 0x20000000 0x0 0x10000000>;

            reg-names = "fspi_base", "fspi_mmap";

            interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;

            clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(4)>,

                     <&clockgen QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(4)>;

            clock-names = "fspi_en", "fspi";

            #address-cells = <1>;

            #size-cells = <0>;



            flash@0 {

                compatible = "jedec,spi-nor";

                spi-max-frequency = <50000000>;

                reg = <0>;

                spi-rx-bus-width = <8>;

                spi-tx-bus-width = <8>;

            };

        };

    };

MAINTAINERS

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@@ -13438,7 +13438,7 @@ M: Ashish Kumar <ashish.kumar@nxp.com> 
R:	Yogesh Gaur <yogeshgaur.83@gmail.com>

L:	linux-spi@vger.kernel.org

S:	Maintained

F:	Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt

F:	Documentation/devicetree/bindings/spi/spi-nxp-fspi.yaml

F:	drivers/spi/spi-nxp-fspi.c









NXP FXAS21002C DRIVER