arch/arm/boot/dts/microchip/at91sam9x5_usart3.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/microchip/at91sam9x5_usart3.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/microchip/at91sam9x5_usart3.dtsi
Extension
.dtsi
Size
1566 bytes
Lines
62
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * at91sam9x5_usart3.dtsi - Device Tree Include file for AT91SAM9x5 SoC with
 * 4 USART.
 *
 * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
 */

#include <dt-bindings/pinctrl/at91.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/mfd/at91-usart.h>

/ {
	aliases {
		serial4 = &usart3;
	};

	ahb {
		apb {
			pinctrl@fffff400 {
				usart3 {
					pinctrl_usart3: usart3-0 {
						atmel,pins =
							<AT91_PIOC 22 AT91_PERIPH_B AT91_PINCTRL_NONE
							 AT91_PIOC 23 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;
					};

					pinctrl_usart3_rts: usart3_rts-0 {
						atmel,pins =
							<AT91_PIOC 24 AT91_PERIPH_B AT91_PINCTRL_NONE>;		/* PC24 periph B */
					};

					pinctrl_usart3_cts: usart3_cts-0 {
						atmel,pins =
							<AT91_PIOC 25 AT91_PERIPH_B AT91_PINCTRL_NONE>;		/* PC25 periph B */
					};

					pinctrl_usart3_sck: usart3_sck-0 {
						atmel,pins =
							<AT91_PIOC 26 AT91_PERIPH_B AT91_PINCTRL_NONE>;		/* PC26 periph B */
					};
				};
			};

			usart3: serial@f8028000 {
				compatible = "atmel,at91sam9260-usart";
				reg = <0xf8028000 0x200>;
				atmel,usart-mode = <AT91_USART_MODE_SERIAL>;
				interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
				pinctrl-names = "default";
				pinctrl-0 = <&pinctrl_usart3>;
				dmas = <&dma1 1 AT91_DMA_CFG_PER_ID(14)>,
				       <&dma1 1 (AT91_DMA_CFG_PER_ID(15) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
				dma-names = "tx", "rx";
				clocks = <&pmc PMC_TYPE_PERIPHERAL 8>;
				clock-names = "usart";
				status = "disabled";
			};
		};
	};
};

Annotation

Implementation Notes