arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
Extension
.dtsi
Size
3655 bytes
Lines
174
Domain
Architecture Layer
Bucket
arch/arm64
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+ OR MIT)
/*
 * sc7280 fragment for devices with Chrome bootloader
 *
 * This file mainly tries to abstract out the memory protections put into
 * place by the Chrome bootloader which are different than what's put into
 * place by Qualcomm's typical bootloader. It also has a smattering of other
 * things that will hold true for any conceivable Chrome design
 *
 * Copyright 2022 Google LLC.
 */

/*
 * Reserved memory changes
 *
 * Delete all unused memory nodes and define the peripheral memory regions
 * required by the setup for Chrome boards.
 */

/delete-node/ &cdsp_mem;
/delete-node/ &domain_idle_states;
/delete-node/ &gpu_zap_mem;
/delete-node/ &gpu_zap_shader;
/delete-node/ &hyp_mem;
/delete-node/ &xbl_mem;
/delete-node/ &reserved_xbl_uefi_log;
/delete-node/ &sec_apps_mem;

/ {
	cpus {
		domain_idle_states: domain-idle-states {
			cluster_sleep_0: cluster-sleep-0 {
				compatible = "domain-idle-state";
				arm,psci-suspend-param = <0x40003444>;
				entry-latency-us = <2752>;
				exit-latency-us = <6562>;
				min-residency-us = <9926>;
			};
		};
	};

	reserved-memory {
		camera_mem: memory@8ad00000 {
			reg = <0x0 0x8ad00000 0x0 0x500000>;
			no-map;
		};
	};
};

&cluster_pd {
	domain-idle-states = <&cluster_sleep_0>;
};

&gpu {
	status = "okay";
};

&lpass_aon {
	status = "okay";
};

&lpass_core {
	status = "okay";
};

&lpass_hm {
	status = "okay";
};

&lpass_tlmm {

Annotation

Implementation Notes