Книга: Embedded Linux Primer: A Practical, Real-World Approach
10.1.1. Building MTD
10.1.1. Building MTD
MTD is included in any recent snapshot of the Linux kernel. However, if you need to take advantage of MTD features that have been added since your kernel version was released, you must download and build the MTD drivers and utilities. Because the MTD package contains both kernel components and user space programs, it is useful to keep the MTD package in a separate project directory and connect it to your kernel source tree. The simplest way to integrate the MTD and your kernel source tree(s) is to use the scripts provided by the MTD package.
Download the MTD package from the location given at the end of this chapter. Unpack the archive into a directory of your choice using the tar utility. Enter the directory and run the patchkernel.sh script. This script provides several options. Execute the script with no parameters for a detailed usage. Listing 10-2 shows how to install the kernel components.
Listing 10-2. Patching Your Kernel for MTD
$ ./patchkernel.sh -2 ../sources/linux-2.6.10-mtd
Patching ../sources/linux-2.6.10-mtd/
Include JFFS2 file system: jffs2
Include JFFS3 file system (experimental): no
Method: ln << Will actually create symbolic links
Can we start now ? [y/N]y
$
Invoking the patchkernel.sh script with the -2 parameter indicates that we want support for the JFFS2 file system. We provide the path to the kernel source directory as ../sources/linux-2.6.10-mtd. By default, patchkernel.sh does not copy any files into the kernel source directory. Instead, it creates symbolic links from the kernel source tree pointing into the MTD subdirectory itself. In this way, you can maintain a common source tree for MTD for any number of kernels that you happen to have on your development workstation. This allows the MTD kernel drivers to be built with the kernel build system, including information about your specific kernel configuration.
Оглавление книги
- Chapter 2 Building and Deploying a Run-Time Image
- Building the Source Yourself
- Building the sendmail.cf File
- Building Programs with make
- Building on Mono's Libraries
- Chapter 10. MTD Subsystem
- 6.4.6. Building an initrd Image
- 9.10. Building a Simple File System
- 10.1. Enabling MTD Services
- 10.2. MTD Basics
- 10.2.1. Configuring MTD
- 10.3. MTD Partitions