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path: root/drivers/watchdog/sa1100_wdt.c
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Diffstat (limited to 'drivers/watchdog/sa1100_wdt.c')
-rw-r--r--drivers/watchdog/sa1100_wdt.c42
1 files changed, 20 insertions, 22 deletions
diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index 97d9da758dcc..31a48437dc3d 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c
@@ -26,6 +26,7 @@
26#include <linux/watchdog.h> 26#include <linux/watchdog.h>
27#include <linux/init.h> 27#include <linux/init.h>
28#include <linux/bitops.h> 28#include <linux/bitops.h>
29#include <linux/uaccess.h>
29 30
30#ifdef CONFIG_ARCH_PXA 31#ifdef CONFIG_ARCH_PXA
31#include <mach/pxa-regs.h> 32#include <mach/pxa-regs.h>
@@ -33,7 +34,6 @@
33 34
34#include <mach/reset.h> 35#include <mach/reset.h>
35#include <mach/hardware.h> 36#include <mach/hardware.h>
36#include <asm/uaccess.h>
37 37
38#define OSCR_FREQ CLOCK_TICK_RATE 38#define OSCR_FREQ CLOCK_TICK_RATE
39 39
@@ -46,7 +46,7 @@ static int boot_status;
46 */ 46 */
47static int sa1100dog_open(struct inode *inode, struct file *file) 47static int sa1100dog_open(struct inode *inode, struct file *file)
48{ 48{
49 if (test_and_set_bit(1,&sa1100wdt_users)) 49 if (test_and_set_bit(1, &sa1100wdt_users))
50 return -EBUSY; 50 return -EBUSY;
51 51
52 /* Activate SA1100 Watchdog timer */ 52 /* Activate SA1100 Watchdog timer */
@@ -67,28 +67,27 @@ static int sa1100dog_open(struct inode *inode, struct file *file)
67static int sa1100dog_release(struct inode *inode, struct file *file) 67static int sa1100dog_release(struct inode *inode, struct file *file)
68{ 68{
69 printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n"); 69 printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
70
71 clear_bit(1, &sa1100wdt_users); 70 clear_bit(1, &sa1100wdt_users);
72
73 return 0; 71 return 0;
74} 72}
75 73
76static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) 74static ssize_t sa1100dog_write(struct file *file, const char __user *data,
75 size_t len, loff_t *ppos)
77{ 76{
78 if (len) 77 if (len)
79 /* Refresh OSMR3 timer. */ 78 /* Refresh OSMR3 timer. */
80 OSMR3 = OSCR + pre_margin; 79 OSMR3 = OSCR + pre_margin;
81
82 return len; 80 return len;
83} 81}
84 82
85static struct watchdog_info ident = { 83static const struct watchdog_info ident = {
86 .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, 84 .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT
85 | WDIOF_KEEPALIVEPING,
87 .identity = "SA1100/PXA255 Watchdog", 86 .identity = "SA1100/PXA255 Watchdog",
88}; 87};
89 88
90static int sa1100dog_ioctl(struct inode *inode, struct file *file, 89static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
91 unsigned int cmd, unsigned long arg) 90 unsigned long arg)
92{ 91{
93 int ret = -ENOTTY; 92 int ret = -ENOTTY;
94 int time; 93 int time;
@@ -109,6 +108,11 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
109 ret = put_user(boot_status, p); 108 ret = put_user(boot_status, p);
110 break; 109 break;
111 110
111 case WDIOC_KEEPALIVE:
112 OSMR3 = OSCR + pre_margin;
113 ret = 0;
114 break;
115
112 case WDIOC_SETTIMEOUT: 116 case WDIOC_SETTIMEOUT:
113 ret = get_user(time, p); 117 ret = get_user(time, p);
114 if (ret) 118 if (ret)
@@ -126,27 +130,20 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
126 case WDIOC_GETTIMEOUT: 130 case WDIOC_GETTIMEOUT:
127 ret = put_user(pre_margin / OSCR_FREQ, p); 131 ret = put_user(pre_margin / OSCR_FREQ, p);
128 break; 132 break;
129
130 case WDIOC_KEEPALIVE:
131 OSMR3 = OSCR + pre_margin;
132 ret = 0;
133 break;
134 } 133 }
135 return ret; 134 return ret;
136} 135}
137 136
138static const struct file_operations sa1100dog_fops = 137static const struct file_operations sa1100dog_fops = {
139{
140 .owner = THIS_MODULE, 138 .owner = THIS_MODULE,
141 .llseek = no_llseek, 139 .llseek = no_llseek,
142 .write = sa1100dog_write, 140 .write = sa1100dog_write,
143 .ioctl = sa1100dog_ioctl, 141 .unlocked_ioctl = sa1100dog_ioctl,
144 .open = sa1100dog_open, 142 .open = sa1100dog_open,
145 .release = sa1100dog_release, 143 .release = sa1100dog_release,
146}; 144};
147 145
148static struct miscdevice sa1100dog_miscdev = 146static struct miscdevice sa1100dog_miscdev = {
149{
150 .minor = WATCHDOG_MINOR, 147 .minor = WATCHDOG_MINOR,
151 .name = "watchdog", 148 .name = "watchdog",
152 .fops = &sa1100dog_fops, 149 .fops = &sa1100dog_fops,
@@ -169,8 +166,9 @@ static int __init sa1100dog_init(void)
169 166
170 ret = misc_register(&sa1100dog_miscdev); 167 ret = misc_register(&sa1100dog_miscdev);
171 if (ret == 0) 168 if (ret == 0)
172 printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n", 169 printk(KERN_INFO
173 margin); 170 "SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
171 margin);
174 return ret; 172 return ret;
175} 173}
176 174