arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
Extension
.dtsi
Size
15249 bytes
Lines
729
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
/*
 * Base DT for Samsung's family of tablets based on Exynos5420.
 *
 * Copyright (c) 2012-2013 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 * Copyright (c) 2022 Henrik Grimler
 */

/dts-v1/;
#include "exynos5420.dtsi"
#include "exynos5420-cpus.dtsi"
#include <dt-bindings/input/input.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/clock/samsung,s2mps11.h>

/ {
	chassis-type = "tablet";

	/*
	 * To successfully boot the mainline kernel with the stock
	 * bootloader (SBOOT), the tlb needs to be flushed after the
	 * page table pointer has been updated in __common_mmu_cache_on.
	 * The same hack is also needed to boot exynos4412-i9300 with
	 * stock bootloader, and probably other Samsung devices of
	 * similar age.  See
	 * https://lore.kernel.org/all/1355276466-18295-1-git-send-email-arve@android.com
	 * for more details.
	 */

	aliases {
		mmc0 = &mmc_0;
		mmc1 = &mmc_1;
		mmc2 = &mmc_2;
	};

	chosen {
		stdout-path = "serial2:115200n8";
	};

	memory@20000000 {
		device_type = "memory";
		reg = <0x20000000 0xbfa00000>;
	};

	firmware@2073000 {
		compatible = "samsung,secure-firmware";
		reg = <0x02073000 0x1000>;
	};

	fixed-rate-clocks {
		oscclk {
			compatible = "samsung,exynos5420-oscclk";
			clock-frequency = <24000000>;
		};
	};

	gpio-keys {
		compatible = "gpio-keys";

		key-power {
			debounce-interval = <10>;
			gpios = <&gpx2 2 GPIO_ACTIVE_LOW>;
			label = "Power";
			linux,code = <KEY_POWER>;
			wakeup-source;
		};

		key-home {
			debounce-interval = <10>;

Annotation

Implementation Notes