mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-26 22:52:18 +00:00
4cf9e464f7
This simple driver provides some functions to control some of the integrated devices. The watchdog is enabled per default. This driver adds a function to disable the watchdog. Also the internal legacy UART (io address 0x3f8/0x2f8) is enabled per default. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Cc: Simon Glass <sjg@chromium.org>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
|
|
* 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;
|
|
}
|