Linux pinctrl子系统的相关内容

【Linux】Pinctrl子系统学习笔记

简介Linux Pinctrl（Pin control）是一个子系统，控制芯片的引脚复用、电气属性和其他和硬件相关的设置。本文将介绍 Linux Pinctrl 子系统的基本概念，架构和使用方法。基本概念引脚（Pins）引脚是芯片上的物理接触点，可以连接到其他芯片或外部设备。在单个芯片上...

嵌入式linux/鸿蒙开发板(IMX6ULL）开发（三十六）GPIO和Pinctrl子系统的使用（下）

1.2.4 sysfs中的访问方法在sysfs中访问GPIO，实际上用的就是引脚号，老的方法。a. 先确定某个GPIO Controller的基准引脚号(base number)，再计算出某个引脚的号码。方法如下：① 先在开发板的/sys/class/gpio目录下，找到各个gpiochipXXX目...

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嵌入式linux/鸿蒙开发板(IMX6ULL）开发（三十六）GPIO和Pinctrl子系统的使用（上）

1.GPIO和Pinctrl子系统的使用参考文档：a. 内核 Documentation\devicetree\bindings\Pinctrl\ 目录下：Pinctrl-bindings.txtb. 内核 Documentation\gpio 目录下： Pinctrl-bindings.txtc....

Linux内核之pinctrl子系统

1. 前言众所周知，ARM SoC提供了十分丰富的硬件接口，而接口物理上的表现就是一个个的pin(或者叫做pad, finger等)。为了实现丰富的硬件功能，SoC的pin需要实现复用功能，即单独的pin需要提供不同功能，例如，pin0既可以作为GPIO，可以也用于i2c的SCL，通过...

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