哈喽，我是老吴，我来继续分享我的学习心得啦。 gpio 和 pinctrl 子系统在内核里的使用率非常高，和嵌入式产品的关联非常大。从这两个子系统开始学习驱动开发是个不错的入门选择。 本文主要关注 gpio 子系统，但是老吴认为必要先说明一下 pinctrl 子系统和 gpio ...

This paper provides a complete solution to the GPIO Verification for any SoC. GPIO interface is available in every ASIC. To avoid duplicate efforts and (save) time to verify the GPIO interface, we ...

If one does not need to specify a GPIO at a given index in the list, one can use <0>. The reset GPIO has two cells (two arguments after the controller phandle), whereas CD GPIO has only one cell. You ...

Editor's Note: The embedded Linux kernel already play a vital role in embedded systems and stands to grow in importance in serving the diverse requirements of the Internet of Things (IoT). In turn, ...

Your MCU/SoC today may have several options for GPIO connections: UART, SPI, I2C. But there are dozens of variations and kinds of GPIO interface protocols: you don’t have enough pins to provide all of ...

Toshiba is developing an interface IC for the automotive CXPI (clock extension peripheral interface) bus whose hardware logic “can control data communication by CXPI protocol and GPIO, eliminating the ...

Welcome to the first entry in the ‘Rarely Asked Questions” blog series. Measuring temperature with a single GPIO is the matter at hand that kicks it off. As the need for sensing capabilities becomes ...