Many SoCs contain pin controllers inside. Through the registers of the pin controller, we can configure the functions and characteristics of one or a group of pins. In software, the pinctrl driver of the Linux kernel can operate the pin controller to complete the following tasks for us: · Enumerate and name all the pins that the pin controller can control; · Provide the ability to multiplex pins; · Provide configuration of pins. Capabilities, such as driving capability, pull-up and pull-down, open drain, etc.
This article is a learning check-in post. For better articles, you can refer to: One of the Pinctrl subsystems to understand the basic concepts_Beluga Enters the Sea Blog-CSDN Blog_pinctrl
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