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/*
* Helpers to multiplex and configure pins on Allwinner SoCs
*
* Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Subject to the GNU GPL v2, or (at your option) any later version.
*/
#include "gpio.h"
#include <arch/io.h>
static struct a10_gpio *const gpio = (void *)GPIO_BASE;
void gpio_set_func(u8 port, u8 pin, u8 pad_func)
{
u8 reg, bit;
u32 reg32;
if ((port > GPS))
return;
pin &= 0x1f;
reg = pin / 8;
bit = (pin % 8) * 4;
reg32 = read32(&gpio->port[port].cfg[reg]);
reg32 &= ~(0xf << bit);
reg32 |= (pad_func & 0xf) << bit;
write32(reg32, &gpio->port[port].cfg[reg]);
}
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