/*-----------------------------------------------------------------------------
| Function :S32 gpio_pin_init(U16 pin_num, U8 in_out)
+------------------------------------------------------------------------------
| Description :This function is to initialize the gpio pin as input or output.
|
| Parameters :pin_num
| - gpio pin that needs to be configured.
|
| in_out
| - specifies whether the pin is to be configured as an
| input or output.
|
| Returns : DAL_SUCCESS, if the initialization is successful.
| else DAL_ERROR.
+-----------------------------------------------------------------------------*/
S32 gpio_pin_init(U16 pin_num, U8 in_out)
{
U8 module_num = pin_num/NUM_OF_BITS_IN_REG + 1;
/* GPIO module to which the GPIO number belongs to */
U32 snum = (module_num-1)*NUM_OF_BITS_IN_REG;
U32 offset = pin_num - snum;
U32 pinmask;
S32 ret_val = OMAPFLASH_SUCCESS;
/* check whether the gpio number is valid */
/* if yes continue else return*/
ret_val = check_gpio_pin_num(pin_num);
if(ret_val != OMAPFLASH_SUCCESS)
{
dbg_print(DBG_LEVEL_CRITICAL, "wrong gpio-pin number \n");
return(ret_val);
}
/* this variable will have the position of the pin in the corresponding
gpio module */
pinmask = GPIO_PIN<<offset;
/* call this function to configure the pin as input or output */
set_gpio_in_out(module_num, pinmask, in_out<<offset);
/*return from this function*/
dbg_print(DBG_LEVEL_INFO, "gpio pin %d initialized \n",pin_num);
return (ret_val);
}
/* This function is to initialize the gpio pin as input or output. */
S32 gpio_pin_init(U16 pin_num, U8 in_out)
{
/* GPIO module to which the GPIO number belongs to. */
U8 module_num = (pin_num / NUM_OF_BITS_IN_REG + 1);
U32 snum = ((module_num - 1) * NUM_OF_BITS_IN_REG);
U32 offset = (pin_num - snum);
U32 pinmask;
S32 ret_val = SUCCESS;
/*
** Check whether the gpio number is valid.
** If yes continue else return.
*/
ret_val = check_gpio_pin_num(pin_num);
if (SUCCESS != ret_val) {
#ifdef OMAP3530_DEBUG
DEBUG("%s:%d - Wrong gpio-pin number.\r\n", __FILE__, __LINE__);
#endif
return (ret_val);
}
/*
** This variable will have the position of the pin in
** the corresponding gpio module.
*/
pinmask = (GPIO_PIN << offset);
/* Call this function to configure the pin as input or output. */
set_gpio_in_out(module_num, pinmask, (in_out << offset));
#ifdef OMAP3530_DEBUG
DEBUG("gpio pin %d initialized.\r\n", pin_num);
#endif
return (ret_val);
}
