Dragino2 ar9331 uses the LED pins as ordinary Gpio

1, the gpio13 and Gpio17 also as ordinary gpio use, modify

target/linux/ar71xx/files/arch/mips/ath79/mach-dragino2.c files are as follows

/** Dragino V2 Board support, based on Atheros AP121 Board Support * * Copyright (C) 2011-2012 Gabor juhos <[email protected]> * Copyright (C) Elektra Wagenrad <[email protected]> * * This program was free software;  You can redistribute it and/or modify it * under the terms of the GNU general public License version 2 as published * by The Free software Foundation. */#include<linux/gpio.h>#include<asm/mach-ath79/ath79.h>#include<asm/mach-ath79/ar71xx_regs.h>#include"Common.h"#include"dev-eth.h"#include"Dev-gpio-buttons.h"#include"dev-leds-gpio.h"#include"dev-m25p80.h"#include"dev-spi-gpio.h"    //Add by Merlin#include"dev-spi.h"#include"Dev-usb.h"#include"dev-wmac.h"#include"Machtypes.h"#defineDragino2_gpio_led_wlan 0//#define Dragino2_gpio_led_lan//#define Dragino2_gpio_led_wan/** The following GPIO is actually named ' Router ' on the board. * However, since the ' Router ' feature is not supported As of yet * we use it to display USB activity. */#defineDragino2_gpio_led_usb 28#defineDragino2_gpio_btn_jumpstart 11#defineDragino2_gpio_btn_reset 12#defineDragino2_keys_poll_interval/* msecs */#defineDragino2_keys_debounce_interval (3 * dragino2_keys_poll_interval)#defineDragino2_mac0_offset 0x0000#defineDragino2_mac1_offset 0x0006#defineDragino2_caldata_offset 0x1000#defineDragino2_wmac_mac_offset 0x1002Static structgpio_led dragino2_leds_gpio[] __initdata = {//    {//. Name = "Dragino2:red:lan",//. Gpio = Dragino2_gpio_led_lan,//. Active_low = 0,//    },{. Name="Dragino2:red:wlan",. Gpio=Dragino2_gpio_led_wlan,. Active_low=0,    },//        {//. Name = "Dragino2:red:wan",//. Gpio = Dragino2_gpio_led_wan,//. Active_low = 0,//    },{. Name="Dragino2:red:usb",. Gpio=Dragino2_gpio_led_usb,. Active_low=0,    },};Static structGpio_keys_button dragino2_gpio_keys[] __initdata ={. desc="Jumpstart Button",. Type=Ev_key,. Code=Key_wps_button,. Debounce_interval=dragino2_keys_debounce_interval,. Gpio=Dragino2_gpio_btn_jumpstart,. Active_low=1,}, {. desc="reset Button",. Type=Ev_key,. Code=Key_restart,. Debounce_interval=dragino2_keys_debounce_interval,. Gpio=Dragino2_gpio_btn_reset,. Active_low=1,    }};Static void__init Dragino2_common_setup (void) {U8*art = (U8 *) kseg1addr (0x1fff0000);    ATH79_REGISTER_M25P80 (NULL); Ath79_register_wmac (Art+Dragino2_caldata_offset, Art+dragino2_wmac_mac_offset); Ath79_init_mac (ath79_eth0_data.mac_addr, Art+ Dragino2_mac0_offset,0); Ath79_init_mac (ath79_eth1_data.mac_addr, Art+ Dragino2_mac1_offset,0); Ath79_register_mdio (0,0x0); /*Enable GPIO15 and GPIO16 and possibly GPIO26 and GPIO27*/    //ath79_gpio_function_disable (ar933x_gpio_func_eth_switch_led2_en | //ar933x_gpio_func_eth_switch_led3_en);Ath79_gpio_function_disable (Ar933x_gpio_func_eth_switch_led0_en |ar933x_gpio_func_eth_switch_led1_en|ar933x_gpio_func_eth_switch_led2_en|ar933x_gpio_func_eth_switch_led3_en|ar933x_gpio_func_eth_switch_led4_en); /*LAN Ports*/Ath79_register_eth (1); /*WAN Port*/Ath79_register_eth (0); //Add by Merlin 2014-07-18Ath79_register_spi_gpio ();}Static void__init Dragino2_setup (void) {dragino2_common_setup (); Ath79_register_leds_gpio (-1, Array_size (Dragino2_leds_gpio), Dragino2_leds_gpio); Ath79_register_gpio_keys_polled (-1, Dragino2_keys_poll_interval, Array_size (Dragino2_gpio_keys), Dragino2_gpio_key    s); Ath79_register_usb ();} Mips_machine (Ath79_mach_dragino2,"DRAGINO2","Dragino Dragino v2", dragino2_setup);

Note Two, 1, comment out the Dragino2_gpio_led_lan and Dragino2_gpio_led_wan related definitions, 2, use the pin as a normal GPIO, to Ath79_gpio_function_ Add the relevant content to the Disable function by default.

2. Testing

such as Test LED3 (gpio_14) and LED6 (GPIO_17)

 [email protected]:/sys/class/gpio# echo  14  > export [email protected] - m-base:/sys/class/gpio# echo  out > Gpio14/-m-base:/sys/class/gpio# echo  1  > Gpio14/value [email protected] -m-base:/sys/class/gpio# Span style= "color: #0000ff;" >echo  17  > export [email  Protected] -m-base:/sys/class/gpio# echo  out > Gpio17/direction [email protected] -m-base:/sys/class/gpio# echo  1  > Gpio17/value 

Reference:

Http://www.cnblogs.com/tfanalysis/p/4206513.html

Dragino2 ar9331 uses the LED pins as ordinary Gpio