191 lines
4.8 KiB
YAML
191 lines
4.8 KiB
YAML
# 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/serial/atmel,at91-usart.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
|
|
|
|
maintainers:
|
|
- Richard Genoud <richard.genoud@gmail.com>
|
|
|
|
properties:
|
|
compatible:
|
|
oneOf:
|
|
- enum:
|
|
- atmel,at91rm9200-usart
|
|
- atmel,at91sam9260-usart
|
|
- microchip,sam9x60-usart
|
|
- items:
|
|
- const: atmel,at91rm9200-dbgu
|
|
- const: atmel,at91rm9200-usart
|
|
- items:
|
|
- const: atmel,at91sam9260-dbgu
|
|
- const: atmel,at91sam9260-usart
|
|
- items:
|
|
- const: microchip,sam9x60-dbgu
|
|
- const: microchip,sam9x60-usart
|
|
- const: atmel,at91sam9260-dbgu
|
|
- const: atmel,at91sam9260-usart
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
interrupts:
|
|
maxItems: 1
|
|
|
|
clock-names:
|
|
minItems: 1
|
|
items:
|
|
- const: usart
|
|
- const: gclk
|
|
|
|
clocks:
|
|
minItems: 1
|
|
items:
|
|
- description: USART Peripheral Clock
|
|
- description: USART Generic Clock
|
|
|
|
dmas:
|
|
items:
|
|
- description: TX DMA Channel
|
|
- description: RX DMA Channel
|
|
|
|
dma-names:
|
|
items:
|
|
- const: tx
|
|
- const: rx
|
|
|
|
atmel,usart-mode:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
description:
|
|
Must be either <AT91_USART_MODE_SPI> for SPI or
|
|
<AT91_USART_MODE_SERIAL> for USART (found in dt-bindings/mfd/at91-usart.h).
|
|
enum: [ 0, 1 ]
|
|
|
|
atmel,use-dma-rx:
|
|
type: boolean
|
|
description: use of PDC or DMA for receiving data
|
|
|
|
atmel,use-dma-tx:
|
|
type: boolean
|
|
description: use of PDC or DMA for transmitting data
|
|
|
|
atmel,fifo-size:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
description:
|
|
Maximum number of data the RX and TX FIFOs can store for FIFO
|
|
capable USARTS.
|
|
enum: [ 16, 32 ]
|
|
|
|
required:
|
|
- compatible
|
|
- reg
|
|
- interrupts
|
|
- clock-names
|
|
- clocks
|
|
- atmel,usart-mode
|
|
|
|
allOf:
|
|
- if:
|
|
properties:
|
|
atmel,usart-mode:
|
|
const: 1
|
|
then:
|
|
allOf:
|
|
- $ref: /schemas/spi/spi-controller.yaml#
|
|
|
|
properties:
|
|
atmel,use-dma-rx: false
|
|
|
|
atmel,use-dma-tx: false
|
|
|
|
atmel,fifo-size: false
|
|
|
|
"#size-cells":
|
|
const: 0
|
|
|
|
"#address-cells":
|
|
const: 1
|
|
|
|
required:
|
|
- "#size-cells"
|
|
- "#address-cells"
|
|
|
|
else:
|
|
allOf:
|
|
- $ref: /schemas/serial/serial.yaml#
|
|
- $ref: /schemas/serial/rs485.yaml#
|
|
|
|
unevaluatedProperties: false
|
|
|
|
examples:
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
|
#include <dt-bindings/mfd/at91-usart.h>
|
|
#include <dt-bindings/dma/at91.h>
|
|
|
|
/* use PDC */
|
|
usart0: serial@fff8c000 {
|
|
compatible = "atmel,at91sam9260-usart";
|
|
reg = <0xfff8c000 0x4000>;
|
|
atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
|
|
interrupts = <7>;
|
|
clocks = <&usart0_clk>;
|
|
clock-names = "usart";
|
|
atmel,use-dma-rx;
|
|
atmel,use-dma-tx;
|
|
rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>;
|
|
cts-gpios = <&pioD 16 GPIO_ACTIVE_LOW>;
|
|
dtr-gpios = <&pioD 17 GPIO_ACTIVE_LOW>;
|
|
dsr-gpios = <&pioD 18 GPIO_ACTIVE_LOW>;
|
|
dcd-gpios = <&pioD 20 GPIO_ACTIVE_LOW>;
|
|
rng-gpios = <&pioD 19 GPIO_ACTIVE_LOW>;
|
|
};
|
|
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
|
#include <dt-bindings/mfd/at91-usart.h>
|
|
#include <dt-bindings/dma/at91.h>
|
|
|
|
/* use DMA */
|
|
usart1: serial@f001c000 {
|
|
compatible = "atmel,at91sam9260-usart";
|
|
reg = <0xf001c000 0x100>;
|
|
atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
|
|
interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
|
|
clocks = <&usart0_clk>;
|
|
clock-names = "usart";
|
|
atmel,use-dma-rx;
|
|
atmel,use-dma-tx;
|
|
dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
|
|
<&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
|
|
dma-names = "tx", "rx";
|
|
atmel,fifo-size = <32>;
|
|
};
|
|
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
|
#include <dt-bindings/mfd/at91-usart.h>
|
|
#include <dt-bindings/dma/at91.h>
|
|
|
|
/* SPI mode */
|
|
spi0: spi@f001c000 {
|
|
compatible = "atmel,at91sam9260-usart";
|
|
reg = <0xf001c000 0x100>;
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
atmel,usart-mode = <AT91_USART_MODE_SPI>;
|
|
interrupts = <12 IRQ_TYPE_LEVEL_HIGH 5>;
|
|
clocks = <&usart0_clk>;
|
|
clock-names = "usart";
|
|
dmas = <&dma0 2 AT91_DMA_CFG_PER_ID(3)>,
|
|
<&dma0 2 (AT91_DMA_CFG_PER_ID(4) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
|
|
dma-names = "tx", "rx";
|
|
cs-gpios = <&pioB 3 GPIO_ACTIVE_HIGH>;
|
|
};
|