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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/atmel,at91sam-i2c.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: I2C for Atmel/Microchip platforms
maintainers:
- Alexandre Belloni <alexandre.belloni@bootlin.com>
properties:
compatible:
oneOf:
- items:
- enum:
- atmel,at91rm9200-i2c
- atmel,at91sam9261-i2c
- atmel,at91sam9260-i2c
- atmel,at91sam9g20-i2c
- atmel,at91sam9g10-i2c
- atmel,at91sam9x5-i2c
- atmel,sama5d4-i2c
- atmel,sama5d2-i2c
- microchip,sam9x60-i2c
- items:
- const: microchip,sama7g5-i2c
- const: microchip,sam9x60-i2c
reg:
maxItems: 1
interrupts:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 0
clocks:
maxItems: 1
clock-frequency:
default: 100000
dmas:
items:
- description: TX DMA Channel Specifier
- description: RX DMA Channel Specifier
dma-names:
items:
- const: tx
- const: rx
atmel,fifo-size:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Maximum number of data the RX and TX FIFOs can store for
FIFO capable I2C controllers.
scl-gpios: true
sda-gpios: true
required:
- compatible
- reg
- interrupts
- "#address-cells"
- "#size-cells"
- clocks
allOf:
- $ref: i2c-controller.yaml
- if:
properties:
compatible:
contains:
enum:
- atmel,sama5d4-i2c
- atmel,sama5d2-i2c
- microchip,sam9x60-i2c
- microchip,sama7g5-i2c
then:
properties:
i2c-sda-hold-time-ns:
description:
TWD hold time
maxItems: 1
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/dma/at91.h>
#include <dt-bindings/gpio/gpio.h>
i2c0: i2c@fff84000 {
compatible = "atmel,at91sam9g20-i2c";
reg = <0xfff84000 0x100>;
interrupts = <12 IRQ_TYPE_LEVEL_HIGH 6>;
#address-cells = <1>;
#size-cells = <0>;
clocks = <&twi0_clk>;
clock-frequency = <400000>;
eeprom@50 {
compatible = "atmel,24c512";
reg = <0x50>;
pagesize = <128>;
};
};
i2c1: i2c@f8034600 {
compatible = "atmel,sama5d2-i2c";
reg = <0xf8034600 0x100>;
interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
AT91_XDMAC_DT_PERID(11)>,
<&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
AT91_XDMAC_DT_PERID(12)>;
dma-names = "tx", "rx";
#address-cells = <1>;
#size-cells = <0>;
clocks = <&flx0>;
atmel,fifo-size = <16>;
i2c-sda-hold-time-ns = <336>;
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c0>;
pinctrl-1 = <&pinctrl_i2c0_gpio>;
sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;
scl-gpios = <&pioA 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
eeprom@54 {
compatible = "atmel,24c02";
reg = <0x54>;
pagesize = <16>;
};
};
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