atmel,at91sam-i2c.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 # Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
    3 %YAML 1.2
    4 ---
    5 $id: http://devicetree.org/schemas/i2c/atmel,at91sam-i2c.yaml#
    6 $schema: http://devicetree.org/meta-schemas/core.yaml#
    7 
    8 title: I2C for Atmel/Microchip platforms
    9 
   10 maintainers:
   11   - Alexandre Belloni <alexandre.belloni@bootlin.com>
   12 
   13 properties:
   14   compatible:
   15     oneOf:
   16       - items:
   17           - enum:
   18               - atmel,at91rm9200-i2c
   19               - atmel,at91sam9261-i2c
   20               - atmel,at91sam9260-i2c
   21               - atmel,at91sam9g20-i2c
   22               - atmel,at91sam9g10-i2c
   23               - atmel,at91sam9x5-i2c
   24               - atmel,sama5d4-i2c
   25               - atmel,sama5d2-i2c
   26               - microchip,sam9x60-i2c
   27       - items:
   28           - const: microchip,sama7g5-i2c
   29           - const: microchip,sam9x60-i2c
   30 
   31   reg:
   32     maxItems: 1
   33 
   34   interrupts:
   35     maxItems: 1
   36 
   37   "#address-cells":
   38     const: 1
   39 
   40   "#size-cells":
   41     const: 0
   42 
   43   clocks:
   44     maxItems: 1
   45 
   46   clock-frequency:
   47     default: 100000
   48 
   49   dmas:
   50     items:
   51       - description: TX DMA Channel Specifier
   52       - description: RX DMA Channel Specifier
   53 
   54   dma-names:
   55     items:
   56       - const: tx
   57       - const: rx
   58 
   59   atmel,fifo-size:
   60     $ref: /schemas/types.yaml#/definitions/uint32
   61     description: |
   62       Maximum number of data the RX and TX FIFOs can store for
   63       FIFO capable I2C controllers.
   64 
   65   scl-gpios: true
   66 
   67   sda-gpios: true
   68 
   69 required:
   70   - compatible
   71   - reg
   72   - interrupts
   73   - "#address-cells"
   74   - "#size-cells"
   75   - clocks
   76 
   77 allOf:
   78   - $ref: "i2c-controller.yaml"
   79   - if:
   80       properties:
   81         compatible:
   82           contains:
   83             enum:
   84               - atmel,sama5d4-i2c
   85               - atmel,sama5d2-i2c
   86               - microchip,sam9x60-i2c
   87               - microchip,sama7g5-i2c
   88     then:
   89       properties:
   90         i2c-sda-hold-time-ns:
   91           description:
   92             TWD hold time
   93           maxItems: 1
   94 
   95 unevaluatedProperties: false
   96 
   97 examples:
   98   - |
   99     #include <dt-bindings/interrupt-controller/irq.h>
  100     #include <dt-bindings/dma/at91.h>
  101     #include <dt-bindings/gpio/gpio.h>
  102 
  103     i2c0: i2c@fff84000 {
  104         compatible = "atmel,at91sam9g20-i2c";
  105         reg = <0xfff84000 0x100>;
  106         interrupts = <12 IRQ_TYPE_LEVEL_HIGH 6>;
  107         #address-cells = <1>;
  108         #size-cells = <0>;
  109         clocks = <&twi0_clk>;
  110         clock-frequency = <400000>;
  111 
  112         eeprom@50 {
  113             compatible = "atmel,24c512";
  114             reg = <0x50>;
  115             pagesize = <128>;
  116         };
  117     };
  118 
  119     i2c1: i2c@f8034600 {
  120         compatible = "atmel,sama5d2-i2c";
  121         reg = <0xf8034600 0x100>;
  122         interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
  123         dmas = <&dma0
  124             (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
  125             AT91_XDMAC_DT_PERID(11)>,
  126                <&dma0
  127             (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
  128             AT91_XDMAC_DT_PERID(12)>;
  129         dma-names = "tx", "rx";
  130         #address-cells = <1>;
  131         #size-cells = <0>;
  132         clocks = <&flx0>;
  133         atmel,fifo-size = <16>;
  134         i2c-sda-hold-time-ns = <336>;
  135         pinctrl-names = "default", "gpio";
  136         pinctrl-0 = <&pinctrl_i2c0>;
  137         pinctrl-1 = <&pinctrl_i2c0_gpio>;
  138         sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;
  139         scl-gpios = <&pioA 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
  140 
  141         eeprom@54 {
  142             compatible = "atmel,24c02";
  143             reg = <0x54>;
  144             pagesize = <16>;
  145         };
  146     };

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