arch/arm/boot/dts/microchip/at91sam9g20ek_2mmc.dts

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/microchip/at91sam9g20ek_2mmc.dts

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/microchip/at91sam9g20ek_2mmc.dts
Extension
.dts
Size
1168 bytes
Lines
55
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
/*
 * at91sam9g20ek_2mmc.dts - Device Tree file for Atmel at91sam9g20ek 2 MMC board
 *
 * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
 */
/dts-v1/;
#include "at91sam9g20ek_common.dtsi"

/ {
	model = "Atmel at91sam9g20ek 2 mmc";
	compatible = "atmel,at91sam9g20ek_2mmc", "atmel,at91sam9g20", "atmel,at91sam9";

	ahb {
		apb {
			mmc0: mmc@fffa8000 {
				/* clk already mux wuth slot0 */
				pinctrl-0 = <
					&pinctrl_board_mmc0_slot0
					&pinctrl_mmc0_slot0_cmd_dat0
					&pinctrl_mmc0_slot0_dat1_3>;
				slot@0 {
					reg = <0>;
					bus-width = <4>;
					cd-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
				};
			};

			pinctrl@fffff400 {
				mmc0_slot0 {
					pinctrl_board_mmc0_slot0: mmc0_slot0-board {
						atmel,pins =
							<AT91_PIOC 2 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;	/* PC2 gpio CD pin pull up and deglitch */
					};
				};
			};
		};
	};

	leds {
		compatible = "gpio-leds";

		led-ds1 {
			label = "ds1";
			gpios = <&pioB 9 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "heartbeat";
		};

		led-ds5 {
			label = "ds5";
			gpios = <&pioB 8 GPIO_ACTIVE_LOW>;
		};
	};
};

Annotation

Implementation Notes