Openwrt Export Gpio Configure (7)

1      Scope of Document

This document describes how to export gpio interface under gpio-export driver

2      Requiremen

2.1     Function Requirement

We can pull up and pull down gpio under /sys/class/gpio dir

2.2     Performance Requirement

NA

3      Hardware Overview

NA

                

4      Functional Description

4.1     Functional Block Diagram

NA

                    

5      Porting

5.1     kernel configure

dts file change:

       gpio_export {

              compatible = "gpio-export";

              #size-cells = <0>;

             

              zigbee_rst {

                     gpio-export,name = "zigbee_rst";

                     gpio-export,output = <1>;

                     gpios = <&gpio0 11 0>;

              };

              rst_4g {

                     gpio-export,name = "rst_4g";

                     gpio-export,output = <1>;

                     gpios = <&gpio1 4 0>;

              };

             

              power_4g {

                     gpio-export,name = "power_4g";

                     gpio-export,output = <1>;

                     gpios = <&gpio0 5 0>;

              };

       };

      

5.2     gpio interface

/sys/class/gpio/{power_4g rst_4g zigbee_rst}