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Description: Linux MTD介绍：
MTD(memory technology device内存技术设备)是用于访问memory设备（ROM、flash）的Linux的子系
统。MTD的主要目的是为了使新的memory设备的驱动更加简单，为此它在硬件和上层之间提供了一个
抽象的接口。MTD的所有源代码在/drivers/mtd子目录下。我将CFI接口的MTD设备分为四层（从设备节
点直到底层硬件驱动），这四层从上到下依次是：设备节点、MTD设备层、MTD原始设备层和硬件驱
动层。
根文件系统
文件系统
字符设备节点
MTD字符设备
MTD块设备
MTD原始设备
FLASH硬件驱动
块
重点是mtd的定义， 以及为什么要有mtd
mtd设备的分层-Linux MTD Introduction: MTD (memory technology device memory technology and equipment) is used to access memory devices (ROM, flash) subsystem of Linux. The main purpose of MTD in order to make the new memory device driver more simple, for it among the top in the hardware and provides an abstract interface. MTD All source code in/drivers/mtd subdirectory. I will CFI interface is divided into four MTD devices (from device node until the underlying hardware drivers), this four-story from top to bottom are: device node, MTD device layer, MTD layer original equipment and hardware driver layer. Root file system file system character device node MTD character device MTD block device MTD Original Equipment hardware drivers FLASH block focused on the definition of MTD, as well as equipment mtdmtd Why should there be a stratified
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