Linux/AM3354: GPIO toggle in U-boot

Hey Biser,

I had been through the above documents earlier and i was able to toggle the specified gpio using the below function
mux.c
-------

static struct module_pin_mux gpio2_7_pin_mux[] = {
{OFFSET(usb0_drvvbus), (MODE(7) | PULLUDEN)}, /* GPIO0_7 */
{-1},
};
void enable_board_pin_mux(void)
{
configure_module_pin_mux(gpio2_7_pin_mux);
}

board.c
-----------------
#define GPIO_OE 0x134 /* Output enable */
#define GPIO_DATAIN 0x138 /* Input value */
#define GPIO_DATAOUT 0x13C /* Write value */
#define GPIO_CLEARDATAOUT 0x190 /* Set to 0 an output */
#define GPIO_SETDATAOUT 0x194 /* Set to 1 an output */
#define AM335X_CM_PER_GPIO2_CLKCTRL (0x44E00000+0xB0)
#define AM335X_GPIO2_BASE 0x481AC000
#define GPIO2(value,offset) __raw_writel(value,(AM335X_GPIO2_BASE+offset));


toggle_gpio(void)
{
int i;

__raw_writel(0x00000002,AM335X_CM_PER_GPIO2_CLKCTRL);

GPIO2(0xFFFFFFFF & ~0x80,GPIO_OE);

for (i=0;i<10;i++)

{
GPIO2(0x00000080,GPIO_SETDATAOUT);
udelay(1000000);
GPIO2(0x00000080,GPIO_CLEARDATAOUT);
udelay(1000000);
}
}

arch/arm/cpu/armv7/omap-common/hwinit-common.c
-------------------------------------------------------------------------------------
int board_early_init_f(void)
{
prcm_init();
set_mux_conf_regs();
toggle_gpio();
#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_ONLY_SUPPORT)
update_rtc_magic();
#endif
return 0;
}


but doing so holds the execution of uboot until the control is there in the loop ,I dont want the toggling to stop my booting process, I want that thing to be running as a background process.Is there any way to achieve that.

with regards
pranav

Thanks pavel,
I want to establish a continuous pulse on the wdi pin of my watchdog can you help me out how can i establish that in uboot and later i will continue the same with kernel but initially i am unable to make it in uboot only. Is it possible to configure that gpio as timer or pwm.

with regards
pranav