Hi Kursad,
Thank you for your reply. We are using the u-boot gpio api . I need to configure the gpio163 as out and need to set value for it. Kindly let me know what modifications are needed in u-boot source code. Please find the beagle.c file.
board/beagle.c
#include <common.h>
#include <twl4030.h>
#include <asm/io.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>
#include <asm/mach-types.h>
#include "beagle.h"
static int beagle_revision_c;
/*
* Routine: board_init
* Description: Early hardware init.
*/
int board_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
/* board id for Linux */
gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
/* boot param addr */
gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
return 0;
}
/*
* Routine: beagle_get_revision
* Description: Return the revision of the BeagleBoard this code is running on.
* If it is a revision Ax/Bx board, this function returns 0,
* on a revision C board you will get a 1.
*/
int beagle_get_revision(void)
{
return beagle_revision_c;
}
/*
* Routine: beagle_identify
* Description: Detect if we are running on a Beagle revision Ax/Bx or
* Cx. This can be done by GPIO_171. If this is low, we are
* running on a revision C board.
*/
void beagle_identify(void)
{
beagle_revision_c = 0;
if (!omap_request_gpio(171)) {
unsigned int val;
omap_set_gpio_direction(171, 1);
val = omap_get_gpio_datain(171);
omap_free_gpio(171);
if (val)
beagle_revision_c = 0;
else
beagle_revision_c = 1;
}
printf("Board revision ");
if (beagle_revision_c)
printf("C\n");
else
printf("Ax/Bx\n");
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
int misc_init_r(void)
{
struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
twl4030_power_init();
twl4030_led_init();
/* Configure GPIOs to output */
writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
/* Set GPIOs */
writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
&gpio6_base->setdataout);
writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
beagle_identify();
dieid_num_r();
return 0;
}
/*
* Routine: set_muxconf_regs
* Description: Setting up the configuration Mux registers specific to the
* hardware. Many pins need to be moved from protect to primary
* mode.
*/
void set_muxconf_regs(void)
{
MUX_BEAGLE();
if (beagle_revision_c) {
MUX_BEAGLE_C();
}
}
Thanks,
Divya
