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深入理解Linux驱动中如何解设备树(DTS)节点

2026-07-02 01:59:09

深入理解Linux驱动中如何解设备树(DTS)节点

深入理解Linux驱动中如何解设备树(DTS)节点

设备树简介
设备树(Device Tree)是一种描述硬件资源的数据结构，它使得Linux内核能够在不重新编译的情况下支持不同的硬件平台。设备树源文件(.dts)被编译成设备树二进制文件(.dtb)，由Bootloader传递给内核。
DTS源文件
→
DTC编译
→
DTB二进制文件
→
Bootloader加载
→
内核解析
在驱动程序中，我们可以通过设备树API来获取节点信息，从而实现硬件资源的动态配置。

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CONNECT:[ UseTime:0.000615s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000752s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000321s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000279s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.000535s ]
SELECT * FROM `set` [ RunTime:0.000194s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.000517s ]
SELECT * FROM `article` WHERE `id` = 489343 LIMIT 1 [ RunTime:0.017471s ]
UPDATE `article` SET `lasttime` = 1783099665 WHERE `id` = 489343 [ RunTime:0.008036s ]
SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.003903s ]
SELECT * FROM `article` WHERE `id` < 489343 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005609s ]
SELECT * FROM `article` WHERE `id` > 489343 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000555s ]
SELECT * FROM `article` WHERE `id` < 489343 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005052s ]
SELECT * FROM `article` WHERE `id` < 489343 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003695s ]
SELECT * FROM `article` WHERE `id` < 489343 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001599s ]

0.118630s

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