blob: f2648f46871bff95c165a0ebcc401533b2fdcd0c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* (C) Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <init.h>
#include <restart.h>
#include <mach/pxa-regs.h>
#include <asm/io.h>
#define OSMR3 0x40A0000C
#define OSCR 0x40A00010
#define OSSR 0x40A00014
#define OWER 0x40A00018
#define OWER_WME (1 << 0) /* Watch-dog Match Enable */
#define OSSR_M3 (1 << 3) /* Match status channel 3 */
static void __noreturn pxa_restart_soc(struct restart_handler *rst)
{
/* Clear last reset source */
pxa_clear_reset_source();
/* Initialize the watchdog and let it fire */
writel(OWER_WME, OWER);
writel(OSSR_M3, OSSR);
writel(readl(OSCR) + 368640, OSMR3); /* ... in 100 ms */
hang();
}
static int restart_register_feature(void)
{
restart_handler_register_fn(pxa_restart_soc);
return 0;
}
coredevice_initcall(restart_register_feature);
|