/*
* Initialize the GPIO Alternative Functions of the LPC178x/7x.
*/
void __init lpc178x_iomux_init(void)
{
int platform;
/*
* Enable power on GPIO. This is not really necessary, because power
* on GPIO is enabled on SoC reset.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCGPIO_MSK, 1);
/*
* Configure IOs depending on the board we're running on, and
* the configuration options we're using.
* Let's control platform strictly: if some of it does not need to
* play with iomux, it must be present in switch below (otherwise,
* the warning message will be printed-out)
*/
platform = lpc178x_platform_get();
switch (platform) {
case PLATFORM_LPC178X_EA_LPC1788:
lpc178x_gpio_config_table(
ea_lpc1788_gpio, ARRAY_SIZE(ea_lpc1788_gpio));
break;
case PLATFORM_LPC178X_LNX_EVB:
lpc178x_gpio_config_table(
lpc_lnx_evb_gpio, ARRAY_SIZE(lpc_lnx_evb_gpio));
break;
default:
printk(KERN_WARNING "%s: unsupported platform %d\n", __func__,
platform);
break;
}
}
/*
* Configure all necessary GPIO pins
*/
static void gpio_init(void)
{
/*
* Enable power on GPIO. This is not really necessary, because power
* on GPIO is enabled on SoC reset.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCGPIO_MSK, 1);
/*
* Configure GPIO pins using the `ea_lpc1788_gpio[]` table
*/
lpc178x_gpio_config_table(ea_lpc1788_gpio, ARRAY_SIZE(ea_lpc1788_gpio));
#ifdef CONFIG_NR_DRAM_BANKS
/*
* Configure GPIO pins used for the External Memory Controller (EMC)
*/
struct lpc178x_gpio_dsc dsc;
/* Configure EMC data pins (DQ0..DQ31) */
dsc.port = 3;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_DATA_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
/*
* Configure EMC row/column address pins (A0..A11) and
* NOR FLash address pins.
*/
dsc.port = 4;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_ADDR_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
#endif
}
