nuvoton_nct6102d.c
1.1 KB
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/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <nuvoton_nct6102d.h>
#include <asm/io.h>
#include <asm/pnp_def.h>
static void superio_outb(int reg, int val)
{
outb(reg, NCT_EFER);
outb(val, NCT_EFDR);
}
static inline int superio_inb(int reg)
{
outb(reg, NCT_EFER);
return inb(NCT_EFDR);
}
static int superio_enter(void)
{
outb(NCT_ENTRY_KEY, NCT_EFER); /* Enter extended function mode */
outb(NCT_ENTRY_KEY, NCT_EFER); /* Again according to manual */
return 0;
}
static void superio_select(int ld)
{
superio_outb(NCT_LD_SELECT_REG, ld);
}
static void superio_exit(void)
{
outb(NCT_EXIT_KEY, NCT_EFER); /* Leave extended function mode */
}
/*
* The Nuvoton NCT6102D starts per default after reset with both,
* the internal watchdog and the internal legacy UART enabled. This
* code provides a function to disable the watchdog.
*/
int nct6102d_wdt_disable(void)
{
superio_enter();
/* Select logical device for WDT */
superio_select(NCT6102D_LD_WDT);
superio_outb(NCT6102D_WDT_TIMEOUT, 0x00);
superio_exit();
return 0;
}