arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi

Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi
Extension
.dtsi
Size
2767 bytes
Lines
92
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+
/*
 * Copyright 2024 NXP
 *	Dong Aisheng <aisheng.dong@nxp.com>
 */

#include <dt-bindings/firmware/imx/rsrc.h>

cm40_ipg_clk: clock-cm40-ipg {
	compatible = "fixed-clock";
	#clock-cells = <0>;
	clock-frequency = <132000000>;
	clock-output-names = "cm40_ipg_clk";
};

cm40_subsys: bus@34000000 {
	compatible = "simple-bus";
	#address-cells = <1>;
	#size-cells = <1>;
	ranges = <0x34000000 0x0 0x34000000 0x4000000>;
	interrupt-parent = <&cm40_intmux>;

	cm40_lpuart: serial@37220000 {
		compatible = "fsl,imx8qxp-lpuart";
		reg = <0x37220000 0x1000>;
		interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&cm40_uart_lpcg IMX_LPCG_CLK_1>, <&cm40_uart_lpcg IMX_LPCG_CLK_0>;
		clock-names = "ipg", "baud";
		assigned-clocks = <&clk IMX_SC_R_M4_0_UART IMX_SC_PM_CLK_PER>;
		assigned-clock-rates = <24000000>;
		power-domains = <&pd IMX_SC_R_M4_0_UART>;
		status = "disabled";
	};

	cm40_i2c: i2c@37230000 {
		compatible = "fsl,imx8qxp-lpi2c", "fsl,imx7ulp-lpi2c";
		reg = <0x37230000 0x1000>;
		interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&cm40_i2c_lpcg IMX_LPCG_CLK_0>,
			 <&cm40_i2c_lpcg IMX_LPCG_CLK_4>;
		clock-names = "per", "ipg";
		assigned-clocks = <&clk IMX_SC_R_M4_0_I2C IMX_SC_PM_CLK_PER>;
		assigned-clock-rates = <24000000>;
		power-domains = <&pd IMX_SC_R_M4_0_I2C>;
		status = "disabled";
	};

	cm40_intmux: intmux@37400000 {
		compatible = "fsl,imx-intmux";
		reg = <0x37400000 0x1000>;
		interrupt-parent = <&gic>;
		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
		interrupt-controller;
		#interrupt-cells = <2>;
		clocks = <&cm40_ipg_clk>;
		clock-names = "ipg";
		power-domains = <&pd IMX_SC_R_M4_0_INTMUX>;
		status = "disabled";
	};

	cm40_uart_lpcg: clock-controller@37620000 {
		compatible = "fsl,imx8qxp-lpcg";
		reg = <0x37620000 0x1000>;

Annotation

Implementation Notes