Thanks,found it with
echo in > /sys/class/gpio/gpio4/direction
My usb stick is recognized right after this.
But I can't get usb initialize from mach!How to solve it?
I've added these lines to mach:
static void __init tl_wr843n_usb_setup(void)
{
/* enable power for the USB port */
gpio_request(TL_WR843N_GPIO_USB_POWER, "USB power");
gpio_direction_output(TL_WR843N_GPIO_USB_POWER, 0); /* 1 is not
working,too */
ath79_register_usb();
}
tl_wr843n_usb_setup();
------------------ Original ------------------
From: "Florian Fainelli"<flor...@openwrt.org>;
Date: Sun, Apr 29, 2012 01:09 AM
To: "openwrt-devel"<openwrt-devel@lists.openwrt.org>;
Cc: "Vince Huang"<axish...@foxmail.com>;
Subject: Re: [OpenWrt-Devel] Exhausted on finding a gpio for USB_POWER...
Hi,
Le samedi 28 avril 2012 19:01:03, Vince Huang a écrit :
> Hi,guys!
> I am finding the gpio to enable USB_POWER for tl-wr843n(arthoes
> ar9341).I've tried out all gpio number just can't power up the usb(with
> factory firmware it does).Can someone kind to help me solve this? These
> are the command I tried to find gpios,don't know if it's proper.But it
> works on leds. root@OpenWrt:~# echo 6 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio6/direction
> root@OpenWrt:~# echo 0 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio0/direction
> root@OpenWrt:~# echo 1 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio1/direction
> root@OpenWrt:~# echo 2 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio2/direction
> root@OpenWrt:~# echo 3 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio3/direction
> root@OpenWrt:~# echo 4 > /sys/class/gpio/export
> root@OpenWrt:~# echo out > /sys/class/gpio/gpio4/direction
> Mach is attached.
Check whether the GPIO might be controlling the USB power using a pull-up/down
GPIO. Set the GPIO direction to output, then back to input and see if that
changes anything.
--
Florian_______________________________________________
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