aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-arm
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/arch-s3c2410/system-reset.h64
-rw-r--r--include/asm-arm/arch-s3c2410/system.h46
2 files changed, 65 insertions, 45 deletions
diff --git a/include/asm-arm/arch-s3c2410/system-reset.h b/include/asm-arm/arch-s3c2410/system-reset.h
new file mode 100644
index 000000000000..1615bce0c026
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/system-reset.h
@@ -0,0 +1,64 @@
1/* linux/include/asm-arm/arch-s3c2410/system-reset.h
2 *
3 * Copyright (c) 2008 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * S3C2410 - System define for arch_reset() function
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11*/
12
13#include <asm/hardware.h>
14#include <asm/io.h>
15
16#include <asm/plat-s3c/regs-watchdog.h>
17#include <asm/arch/regs-clock.h>
18
19#include <linux/clk.h>
20#include <linux/err.h>
21
22extern void (*s3c24xx_reset_hook)(void);
23
24static void
25arch_reset(char mode)
26{
27 struct clk *wdtclk;
28
29 if (mode == 's') {
30 cpu_reset(0);
31 }
32
33 if (s3c24xx_reset_hook)
34 s3c24xx_reset_hook();
35
36 printk("arch_reset: attempting watchdog reset\n");
37
38 __raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */
39
40 wdtclk = clk_get(NULL, "watchdog");
41 if (!IS_ERR(wdtclk)) {
42 clk_enable(wdtclk);
43 } else
44 printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
45
46 /* put initial values into count and data */
47 __raw_writel(0x80, S3C2410_WTCNT);
48 __raw_writel(0x80, S3C2410_WTDAT);
49
50 /* set the watchdog to go and reset... */
51 __raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
52 S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);
53
54 /* wait for reset to assert... */
55 mdelay(500);
56
57 printk(KERN_ERR "Watchdog reset failed to assert reset\n");
58
59 /* delay to allow the serial port to show the message */
60 mdelay(50);
61
62 /* we'll take a jump through zero as a poor second */
63 cpu_reset(0);
64}
diff --git a/include/asm-arm/arch-s3c2410/system.h b/include/asm-arm/arch-s3c2410/system.h
index 14de4e596f87..ad258085e53b 100644
--- a/include/asm-arm/arch-s3c2410/system.h
+++ b/include/asm-arm/arch-s3c2410/system.h
@@ -17,12 +17,8 @@
17#include <asm/arch/idle.h> 17#include <asm/arch/idle.h>
18#include <asm/arch/reset.h> 18#include <asm/arch/reset.h>
19 19
20#include <asm/plat-s3c/regs-watchdog.h>
21#include <asm/arch/regs-clock.h> 20#include <asm/arch/regs-clock.h>
22 21
23#include <linux/clk.h>
24#include <linux/err.h>
25
26void (*s3c24xx_idle)(void); 22void (*s3c24xx_idle)(void);
27void (*s3c24xx_reset_hook)(void); 23void (*s3c24xx_reset_hook)(void);
28 24
@@ -59,44 +55,4 @@ static void arch_idle(void)
59 s3c24xx_default_idle(); 55 s3c24xx_default_idle();
60} 56}
61 57
62static void 58#include <asm/arch/system-reset.h>
63arch_reset(char mode)
64{
65 struct clk *wdtclk;
66
67 if (mode == 's') {
68 cpu_reset(0);
69 }
70
71 if (s3c24xx_reset_hook)
72 s3c24xx_reset_hook();
73
74 printk("arch_reset: attempting watchdog reset\n");
75
76 __raw_writel(0, S3C2410_WTCON); /* disable watchdog, to be safe */
77
78 wdtclk = clk_get(NULL, "watchdog");
79 if (!IS_ERR(wdtclk)) {
80 clk_enable(wdtclk);
81 } else
82 printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__);
83
84 /* put initial values into count and data */
85 __raw_writel(0x80, S3C2410_WTCNT);
86 __raw_writel(0x80, S3C2410_WTDAT);
87
88 /* set the watchdog to go and reset... */
89 __raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
90 S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);
91
92 /* wait for reset to assert... */
93 mdelay(500);
94
95 printk(KERN_ERR "Watchdog reset failed to assert reset\n");
96
97 /* delay to allow the serial port to show the message */
98 mdelay(50);
99
100 /* we'll take a jump through zero as a poor second */
101 cpu_reset(0);
102}