Commit 19951f4c authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Rob Herring
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dt-bindings: nfc: st,nci: convert to dtschema 



Convert the ST NCI (ST21NFCB) NFC controller to DT schema format.

Changes during bindings conversion:
1. Add a new required "reg" property for SPI binding, because SPI child
   devices use it as chip-select.
2. Drop the "clock-frequency" property during conversion because it is a
   property of I2C bus controller, not I2C slave device.  It was also
   never used by the driver.

Signed-off-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211011073934.34340-7-krzysztof.kozlowski@canonical.com


Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent d45c6e7a

Documentation/devicetree/bindings/net/nfc/st,st-nci.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/net/nfc/st,st-nci.yaml#

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



title: STMicroelectronics ST NCI NFC controller



maintainers:

  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>



properties:

  compatible:

    enum:

      - st,st21nfcb-i2c

      - st,st21nfcb-spi

      - st,st21nfcc-i2c



  reset-gpios:

    description: Output GPIO pin used for resetting the controller



  ese-present:

    type: boolean

    description: |

      Specifies that an ese is physically connected to the controller



  interrupts:

    maxItems: 1



  reg:

    maxItems: 1



  spi-max-frequency: true



  uicc-present:

    type: boolean

    description: |

      Specifies that the uicc swp signal can be physically connected to the

      controller



required:

  - compatible

  - interrupts

  - reg

  - reset-gpios



if:

  properties:

    compatible:

      contains:

        enum:

          - st,st21nfcb-i2c

          - st,st21nfcc-i2c

then:

  properties:

    spi-max-frequency: false

else:

  required:

    - spi-max-frequency



additionalProperties: false



examples:

  - |

    #include <dt-bindings/gpio/gpio.h>

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



    i2c {

        #address-cells = <1>;

        #size-cells = <0>;



        nfc@8 {

            compatible = "st,st21nfcb-i2c";

            reg = <0x08>;



            interrupt-parent = <&gpio5>;

            interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;

            reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;



            ese-present;

            uicc-present;

        };

    };



  - |

    #include <dt-bindings/gpio/gpio.h>

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



    spi {

        #address-cells = <1>;

        #size-cells = <0>;



        nfc@0 {

            compatible = "st,st21nfcb-spi";

            reg = <0>;



            spi-max-frequency = <4000000>;



            interrupt-parent = <&gpio5>;

            interrupts = <2 IRQ_TYPE_EDGE_RISING>;

            reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;



            ese-present;

            uicc-present;

        };

    };

Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt

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* STMicroelectronics SAS. ST NCI NFC Controller



Required properties:

- compatible: Should be "st,st21nfcb-i2c" or "st,st21nfcc-i2c".

- clock-frequency: I²C work frequency.

- reg: address on the bus

- interrupts: GPIO interrupt to which the chip is connected

- reset-gpios: Output GPIO pin used to reset the ST21NFCB



Optional SoC Specific Properties:

- pinctrl-names: Contains only one value - "default".

- pintctrl-0: Specifies the pin control groups used for this controller.

- ese-present: Specifies that an ese is physically connected to the nfc

controller.

- uicc-present: Specifies that the uicc swp signal can be physically

connected to the nfc controller.



Example (for ARM-based BeagleBoard xM with ST21NFCB on I2C2):



&i2c2 {





	st21nfcb: st21nfcb@8 {



		compatible = "st,st21nfcb-i2c";



		reg = <0x08>;

		clock-frequency = <400000>;



		interrupt-parent = <&gpio5>;

		interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;



		reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;



		ese-present;

		uicc-present;

	};

};

Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt

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* STMicroelectronics SAS. ST NCI NFC Controller



Required properties:

- compatible: Should be "st,st21nfcb-spi"

- spi-max-frequency: Maximum SPI frequency (<= 4000000).

- interrupts: GPIO interrupt to which the chip is connected

- reset-gpios: Output GPIO pin used to reset the ST21NFCB



Optional SoC Specific Properties:

- pinctrl-names: Contains only one value - "default".

- pintctrl-0: Specifies the pin control groups used for this controller.

- ese-present: Specifies that an ese is physically connected to the nfc

controller.

- uicc-present: Specifies that the uicc swp signal can be physically

connected to the nfc controller.



Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):



&mcspi4 {





	st21nfcb: st21nfcb@0 {



		compatible = "st,st21nfcb-spi";



		clock-frequency = <4000000>;



		interrupt-parent = <&gpio5>;

		interrupts = <2 IRQ_TYPE_EDGE_RISING>;



		reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;



		ese-present;

		uicc-present;

	};

};