1*4cf9e464SStefan Roese /*
2*4cf9e464SStefan Roese * Copyright (C) 2016 Stefan Roese <sr@denx.de>
3*4cf9e464SStefan Roese *
4*4cf9e464SStefan Roese * SPDX-License-Identifier: GPL-2.0+
5*4cf9e464SStefan Roese */
6*4cf9e464SStefan Roese
7*4cf9e464SStefan Roese #include <common.h>
8*4cf9e464SStefan Roese #include <nuvoton_nct6102d.h>
9*4cf9e464SStefan Roese #include <asm/io.h>
10*4cf9e464SStefan Roese #include <asm/pnp_def.h>
11*4cf9e464SStefan Roese
superio_outb(int reg,int val)12*4cf9e464SStefan Roese static void superio_outb(int reg, int val)
13*4cf9e464SStefan Roese {
14*4cf9e464SStefan Roese outb(reg, NCT_EFER);
15*4cf9e464SStefan Roese outb(val, NCT_EFDR);
16*4cf9e464SStefan Roese }
17*4cf9e464SStefan Roese
superio_inb(int reg)18*4cf9e464SStefan Roese static inline int superio_inb(int reg)
19*4cf9e464SStefan Roese {
20*4cf9e464SStefan Roese outb(reg, NCT_EFER);
21*4cf9e464SStefan Roese return inb(NCT_EFDR);
22*4cf9e464SStefan Roese }
23*4cf9e464SStefan Roese
superio_enter(void)24*4cf9e464SStefan Roese static int superio_enter(void)
25*4cf9e464SStefan Roese {
26*4cf9e464SStefan Roese outb(NCT_ENTRY_KEY, NCT_EFER); /* Enter extended function mode */
27*4cf9e464SStefan Roese outb(NCT_ENTRY_KEY, NCT_EFER); /* Again according to manual */
28*4cf9e464SStefan Roese
29*4cf9e464SStefan Roese return 0;
30*4cf9e464SStefan Roese }
31*4cf9e464SStefan Roese
superio_select(int ld)32*4cf9e464SStefan Roese static void superio_select(int ld)
33*4cf9e464SStefan Roese {
34*4cf9e464SStefan Roese superio_outb(NCT_LD_SELECT_REG, ld);
35*4cf9e464SStefan Roese }
36*4cf9e464SStefan Roese
superio_exit(void)37*4cf9e464SStefan Roese static void superio_exit(void)
38*4cf9e464SStefan Roese {
39*4cf9e464SStefan Roese outb(NCT_EXIT_KEY, NCT_EFER); /* Leave extended function mode */
40*4cf9e464SStefan Roese }
41*4cf9e464SStefan Roese
42*4cf9e464SStefan Roese /*
43*4cf9e464SStefan Roese * The Nuvoton NCT6102D starts per default after reset with both,
44*4cf9e464SStefan Roese * the internal watchdog and the internal legacy UART enabled. This
45*4cf9e464SStefan Roese * code provides a function to disable the watchdog.
46*4cf9e464SStefan Roese */
nct6102d_wdt_disable(void)47*4cf9e464SStefan Roese int nct6102d_wdt_disable(void)
48*4cf9e464SStefan Roese {
49*4cf9e464SStefan Roese superio_enter();
50*4cf9e464SStefan Roese /* Select logical device for WDT */
51*4cf9e464SStefan Roese superio_select(NCT6102D_LD_WDT);
52*4cf9e464SStefan Roese superio_outb(NCT6102D_WDT_TIMEOUT, 0x00);
53*4cf9e464SStefan Roese superio_exit();
54*4cf9e464SStefan Roese
55*4cf9e464SStefan Roese return 0;
56*4cf9e464SStefan Roese }
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