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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/i2c/atmel,at91sam-i2c.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

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# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/i2c/atmel,at91sam-i2c.yaml#

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

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title: I2C for Atmel/Microchip platforms

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maintainers:

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  - Alexandre Belloni <alexandre.belloni@bootlin.com>

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properties:

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  compatible:

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    oneOf:

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      - items:

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          - enum:

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              - atmel,at91rm9200-i2c

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              - atmel,at91sam9261-i2c

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              - atmel,at91sam9260-i2c

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              - atmel,at91sam9g20-i2c

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              - atmel,at91sam9g10-i2c

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              - atmel,at91sam9x5-i2c

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              - atmel,sama5d4-i2c

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              - atmel,sama5d2-i2c

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              - microchip,sam9x60-i2c

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      - items:

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          - enum:

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              - microchip,lan9691-i2c

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              - microchip,sama7d65-i2c

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              - microchip,sama7g5-i2c

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              - microchip,sam9x7-i2c

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          - const: microchip,sam9x60-i2c

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  reg:

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    maxItems: 1

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  interrupts:

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    maxItems: 1

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  clocks:

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    maxItems: 1

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  clock-frequency:

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    default: 100000

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  dmas:

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    items:

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      - description: TX DMA Channel Specifier

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      - description: RX DMA Channel Specifier

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  dma-names:

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    items:

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      - const: tx

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      - const: rx

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  atmel,fifo-size:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: |

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      Maximum number of data the RX and TX FIFOs can store for

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      FIFO capable I2C controllers.

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  scl-gpios: true

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  sda-gpios: true

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required:

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  - compatible

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  - reg

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  - interrupts

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  - clocks

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allOf:

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  - $ref: /schemas/i2c/i2c-controller.yaml#

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  - if:

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      properties:

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        compatible:

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          contains:

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            enum:

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              - atmel,sama5d4-i2c

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              - atmel,sama5d2-i2c

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              - microchip,sam9x60-i2c

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              - microchip,sama7d65-i2c

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              - microchip,sama7g5-i2c

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    then:

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      properties:

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        i2c-sda-hold-time-ns:

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          description:

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            TWD hold time

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          maxItems: 1

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unevaluatedProperties: false

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examples:

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  - |

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

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    #include <dt-bindings/dma/at91.h>

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

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    i2c0: i2c@fff84000 {

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        compatible = "atmel,at91sam9g20-i2c";

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        reg = <0xfff84000 0x100>;

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        interrupts = <12 IRQ_TYPE_LEVEL_HIGH 6>;

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        #address-cells = <1>;

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        #size-cells = <0>;

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        clocks = <&twi0_clk>;

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        clock-frequency = <400000>;

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        eeprom@50 {

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            compatible = "atmel,24c512";

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            reg = <0x50>;

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            pagesize = <128>;

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        };

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    };

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    i2c1: i2c@f8034600 {

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        compatible = "atmel,sama5d2-i2c";

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        reg = <0xf8034600 0x100>;

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        interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;

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        dmas = <&dma0

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            (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))

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            AT91_XDMAC_DT_PERID(11)>,

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               <&dma0

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            (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))

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            AT91_XDMAC_DT_PERID(12)>;

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        dma-names = "tx", "rx";

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        #address-cells = <1>;

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        #size-cells = <0>;

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        clocks = <&flx0>;

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        atmel,fifo-size = <16>;

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        i2c-sda-hold-time-ns = <336>;

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        pinctrl-names = "default", "gpio";

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        pinctrl-0 = <&pinctrl_i2c0>;

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        pinctrl-1 = <&pinctrl_i2c0_gpio>;

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        sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;

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        scl-gpios = <&pioA 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

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        eeprom@54 {

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            compatible = "atmel,24c02";

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            reg = <0x54>;

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            pagesize = <16>;

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        };

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    };

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