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}