Linux DTS(Device Tree Source)是一种描述硬件信息的数据结构,主要用于描述嵌入式系统中各个硬件设备的信息,包括设备的地址、中断、寄存器配置以及设备驱动等。在Linux内核中,DTS文件通常被用来描述板载设备的硬件信息,以便操作系统能够正确地识别和使用硬件设备。
DTS文件结构
一个典型的DTS文件如下所示:
/dts-v1/; #include <imx6qdl-pico.dtsi> #include <imx6qdl-pico-m4.dtsi> / { compatible = "fsl,imx6q-pico", "fsl,imx6q"; model = "Boundary Devices i.MX6 Quad SABRE Lite"; memory { device_type = "memory"; reg = <0x10000000 0x40000000>; }; chosen { compatible = "brcm,bcm2835"; uart_boot = <&uart1>; }; aliases { serial0 = &uart1; }; soc { compatible = "simple-bus"; #address-cells = <1>; #size-cells = <1>; ranges; gpio: gpio@0209c000 { compatible = "fsl,imx6ul-gpio"; reg = <0x0209c000 0x1000>; interrupts = <GPIOn IRQn>; gpio-controller; #gpio-cells = <2>; }; }; uart1: serial@02020000 { compatible = "fsl,imx6q-uart", "fsl,imx21-uart"; reg = <0x02020000 0x40000>; interrupts = <78>; clocks = <&clks 82>; clock-names = "ipg", "per"; status = "okay"; }; sound { compatible = "fsl,imx6-sai"; model = "imx6-sai"; status = "okay"; /* SSI1 */ ssi@021d8000 { compatible = "fsl,imx6-sai"; reg = <0x021d8000 0x4000>; interrupts = <0 125 0>; clocks = <&clks 2>; dmas = <&sdma 9 11 0>, <&sdma 10 11 0>, <&sdma 11 11 0>; dma-names = "tx", "rx", "mclk"; status = "okay"; }; }; };
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