[WATCHDOG] ks8695_wdt.c - new KS8695 watchdog driver

Watchdog driver for the Kendin/Micrel KS8695 processor. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

[WATCHDOG] ks8695_wdt.c - new KS8695 watchdog driver
Watchdog driver for the Kendin/Micrel KS8695 processor. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Andrew Victor · Wim Van Sebroeck
1 parent 55b637c6a0
Showing 3 changed files with 316 additions and 0 deletions Side-by-side Diff
drivers/char/watchdog/Kconfig
drivers/char/watchdog/Makefile
drivers/char/watchdog/ks8695_wdt.c
@@ -115,6 +115,13 @@
  
 	  Say N if you are unsure.
  
+config KS8695_WATCHDOG
+	tristate "KS8695 watchdog"
+	depends on ARCH_KS8695
+	help
+	  Watchdog timer embedded into KS8695 processor. This will reboot your
+	  system when the timeout is reached.
+
 config S3C2410_WATCHDOG
 	tristate "S3C2410 Watchdog"
 	depends on ARCH_S3C2410
@@ -29,6 +29,7 @@
 obj-$(CONFIG_977_WATCHDOG) += wdt977.o
 obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
 obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
+obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
 obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
 obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
 obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
+/*
+ * Watchdog driver for Kendin/Micrel KS8695.
+ *
+ * (C) 2007 Andrew Victor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/arch/regs-timer.h>
+
+
+#define WDT_DEFAULT_TIME	5	/* seconds */
+#define WDT_MAX_TIME		171	/* seconds */
+
+static int wdt_time = WDT_DEFAULT_TIME;
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+module_param(wdt_time, int, 0);
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+#endif
+
+
+static unsigned long ks8695wdt_busy;
+
+/* ......................................................................... */
+
+/*
+ * Disable the watchdog.
+ */
+static void inline ks8695_wdt_stop(void)
+{
+	unsigned long tmcon;
+
+	/* disable timer0 */
+	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Enable and reset the watchdog.
+ */
+static void inline ks8695_wdt_start(void)
+{
+	unsigned long tmcon;
+	unsigned long tval = wdt_time * CLOCK_TICK_RATE;
+
+	/* disable timer0 */
+	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+
+	/* program timer0 */
+	__raw_writel(tval | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
+
+	/* re-enable timer0 */
+	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Reload the watchdog timer.  (ie, pat the watchdog)
+ */
+static void inline ks8695_wdt_reload(void)
+{
+	unsigned long tmcon;
+
+	/* disable, then re-enable timer0 */
+	tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+	__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+	__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Change the watchdog time interval.
+ */
+static int ks8695_wdt_settimeout(int new_time)
+{
+	/*
+	 * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+	 *
+	 * Since WDV is a 16-bit counter, the maximum period is
+	 * 65536 / 0.256 = 256 seconds.
+	 */
+	if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
+		return -EINVAL;
+
+	/* Set new watchdog time. It will be used when ks8695_wdt_start() is called. */
+	wdt_time = new_time;
+	return 0;
+}
+
+/* ......................................................................... */
+
+/*
+ * Watchdog device is opened, and watchdog starts running.
+ */
+static int ks8695_wdt_open(struct inode *inode, struct file *file)
+{
+	if (test_and_set_bit(0, &ks8695wdt_busy))
+		return -EBUSY;
+
+	ks8695_wdt_start();
+	return nonseekable_open(inode, file);
+}
+
+/*
+ * Close the watchdog device.
+ * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
+ *  disabled.
+ */
+static int ks8695_wdt_close(struct inode *inode, struct file *file)
+{
+	if (!nowayout)
+		ks8695_wdt_stop();	/* Disable the watchdog when file is closed */
+
+	clear_bit(0, &ks8695wdt_busy);
+	return 0;
+}
+
+static struct watchdog_info ks8695_wdt_info = {
+	.identity	= "ks8695 watchdog",
+	.options	= WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+};
+
+/*
+ * Handle commands from user-space.
+ */
+static int ks8695_wdt_ioctl(struct inode *inode, struct file *file,
+		unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+	int new_value;
+
+	switch(cmd) {
+		case WDIOC_KEEPALIVE:
+			ks8695_wdt_reload();	/* pat the watchdog */
+			return 0;
+
+		case WDIOC_GETSUPPORT:
+			return copy_to_user(argp, &ks8695_wdt_info, sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
+
+		case WDIOC_SETTIMEOUT:
+			if (get_user(new_value, p))
+				return -EFAULT;
+
+			if (ks8695_wdt_settimeout(new_value))
+				return -EINVAL;
+
+			/* Enable new time value */
+			ks8695_wdt_start();
+
+			/* Return current value */
+			return put_user(wdt_time, p);
+
+		case WDIOC_GETTIMEOUT:
+			return put_user(wdt_time, p);
+
+		case WDIOC_GETSTATUS:
+		case WDIOC_GETBOOTSTATUS:
+			return put_user(0, p);
+
+		case WDIOC_SETOPTIONS:
+			if (get_user(new_value, p))
+				return -EFAULT;
+
+			if (new_value & WDIOS_DISABLECARD)
+				ks8695_wdt_stop();
+			if (new_value & WDIOS_ENABLECARD)
+				ks8695_wdt_start();
+			return 0;
+
+		default:
+			return -ENOTTY;
+	}
+}
+
+/*
+ * Pat the watchdog whenever device is written to.
+ */
+static ssize_t ks8695_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+	ks8695_wdt_reload();		/* pat the watchdog */
+	return len;
+}
+
+/* ......................................................................... */
+
+static const struct file_operations ks8695wdt_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.ioctl		= ks8695_wdt_ioctl,
+	.open		= ks8695_wdt_open,
+	.release	= ks8695_wdt_close,
+	.write		= ks8695_wdt_write,
+};
+
+static struct miscdevice ks8695wdt_miscdev = {
+	.minor		= WATCHDOG_MINOR,
+	.name		= "watchdog",
+	.fops		= &ks8695wdt_fops,
+};
+
+static int __init ks8695wdt_probe(struct platform_device *pdev)
+{
+	int res;
+
+	if (ks8695wdt_miscdev.parent)
+		return -EBUSY;
+	ks8695wdt_miscdev.parent = &pdev->dev;
+
+	res = misc_register(&ks8695wdt_miscdev);
+	if (res)
+		return res;
+
+	printk("KS8695 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+	return 0;
+}
+
+static int __exit ks8695wdt_remove(struct platform_device *pdev)
+{
+	int res;
+
+	res = misc_deregister(&ks8695wdt_miscdev);
+	if (!res)
+		ks8695wdt_miscdev.parent = NULL;
+
+	return res;
+}
+
+static void ks8695wdt_shutdown(struct platform_device *pdev)
+{
+	ks8695_wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
+{
+	ks8695_wdt_stop();
+	return 0;
+}
+
+static int ks8695wdt_resume(struct platform_device *pdev)
+{
+	if (ks8695wdt_busy)
+		ks8695_wdt_start();
+	return 0;
+}
+
+#else
+#define ks8695wdt_suspend NULL
+#define ks8695wdt_resume	NULL
+#endif
+
+static struct platform_driver ks8695wdt_driver = {
+	.probe		= ks8695wdt_probe,
+	.remove		= __exit_p(ks8695wdt_remove),
+	.shutdown	= ks8695wdt_shutdown,
+	.suspend	= ks8695wdt_suspend,
+	.resume		= ks8695wdt_resume,
+	.driver		= {
+		.name	= "ks8695_wdt",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init ks8695_wdt_init(void)
+{
+	/* Check that the heartbeat value is within range; if not reset to the default */
+	if (ks8695_wdt_settimeout(wdt_time)) {
+		ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
+		pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", wdt_time, WDT_MAX_TIME);
+	}
+
+	return platform_driver_register(&ks8695wdt_driver);
+}
+
+static void __exit ks8695_wdt_exit(void)
+{
+	platform_driver_unregister(&ks8695wdt_driver);
+}
+
+module_init(ks8695_wdt_init);
+module_exit(ks8695_wdt_exit);
+
+MODULE_AUTHOR("Andrew Victor");
+MODULE_DESCRIPTION("Watchdog driver for KS8695");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
...	...	@@ -115,6 +115,13 @@
115	115
116	116	Say N if you are unsure.
117	117
	118	+config KS8695_WATCHDOG
	119	+ tristate "KS8695 watchdog"
	120	+ depends on ARCH_KS8695
	121	+ help
	122	+ Watchdog timer embedded into KS8695 processor. This will reboot your
	123	+ system when the timeout is reached.
	124	+
118	125	config S3C2410_WATCHDOG
119	126	tristate "S3C2410 Watchdog"
120	127	depends on ARCH_S3C2410
...	...	@@ -29,6 +29,7 @@
29	29	obj-$(CONFIG_977_WATCHDOG) += wdt977.o
30	30	obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
31	31	obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
	32	+obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
32	33	obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
33	34	obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
34	35	obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
	1	+/*
	2	+ * Watchdog driver for Kendin/Micrel KS8695.
	3	+ *
	4	+ * (C) 2007 Andrew Victor
	5	+ *
	6	+ * This program is free software; you can redistribute it and/or modify
	7	+ * it under the terms of the GNU General Public License version 2 as
	8	+ * published by the Free Software Foundation.
	9	+ */
	10	+
	11	+#include <linux/errno.h>
	12	+#include <linux/fs.h>
	13	+#include <linux/init.h>
	14	+#include <linux/kernel.h>
	15	+#include <linux/miscdevice.h>
	16	+#include <linux/module.h>
	17	+#include <linux/moduleparam.h>
	18	+#include <linux/platform_device.h>
	19	+#include <linux/types.h>
	20	+#include <linux/watchdog.h>
	21	+#include <asm/bitops.h>
	22	+#include <asm/io.h>
	23	+#include <asm/uaccess.h>
	24	+#include <asm/arch/regs-timer.h>
	25	+
	26	+
	27	+#define WDT_DEFAULT_TIME 5 /* seconds */
	28	+#define WDT_MAX_TIME 171 /* seconds */
	29	+
	30	+static int wdt_time = WDT_DEFAULT_TIME;
	31	+static int nowayout = WATCHDOG_NOWAYOUT;
	32	+
	33	+module_param(wdt_time, int, 0);
	34	+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
	35	+
	36	+#ifdef CONFIG_WATCHDOG_NOWAYOUT
	37	+module_param(nowayout, int, 0);
	38	+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
	39	+#endif
	40	+
	41	+
	42	+static unsigned long ks8695wdt_busy;
	43	+
	44	+/* ......................................................................... */
	45	+
	46	+/*
	47	+ * Disable the watchdog.
	48	+ */
	49	+static void inline ks8695_wdt_stop(void)
	50	+{
	51	+ unsigned long tmcon;
	52	+
	53	+ /* disable timer0 */
	54	+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
	55	+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
	56	+}
	57	+
	58	+/*
	59	+ * Enable and reset the watchdog.
	60	+ */
	61	+static void inline ks8695_wdt_start(void)
	62	+{
	63	+ unsigned long tmcon;
	64	+ unsigned long tval = wdt_time * CLOCK_TICK_RATE;
	65	+
	66	+ /* disable timer0 */
	67	+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
	68	+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
	69	+
	70	+ /* program timer0 */
	71	+ __raw_writel(tval \| T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
	72	+
	73	+ /* re-enable timer0 */
	74	+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
	75	+ __raw_writel(tmcon \| TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
	76	+}
	77	+
	78	+/*
	79	+ * Reload the watchdog timer. (ie, pat the watchdog)
	80	+ */
	81	+static void inline ks8695_wdt_reload(void)
	82	+{
	83	+ unsigned long tmcon;
	84	+
	85	+ /* disable, then re-enable timer0 */
	86	+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
	87	+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
	88	+ __raw_writel(tmcon \| TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
	89	+}
	90	+
	91	+/*
	92	+ * Change the watchdog time interval.
	93	+ */
	94	+static int ks8695_wdt_settimeout(int new_time)
	95	+{
	96	+ /*
	97	+ * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
	98	+ *
	99	+ * Since WDV is a 16-bit counter, the maximum period is
	100	+ * 65536 / 0.256 = 256 seconds.
	101	+ */
	102	+ if ((new_time <= 0) \|\| (new_time > WDT_MAX_TIME))
	103	+ return -EINVAL;
	104	+
	105	+ /* Set new watchdog time. It will be used when ks8695_wdt_start() is called. */
	106	+ wdt_time = new_time;
	107	+ return 0;
	108	+}
	109	+
	110	+/* ......................................................................... */
	111	+
	112	+/*
	113	+ * Watchdog device is opened, and watchdog starts running.
	114	+ */
	115	+static int ks8695_wdt_open(struct inode inode, struct file file)
	116	+{
	117	+ if (test_and_set_bit(0, &ks8695wdt_busy))
	118	+ return -EBUSY;
	119	+
	120	+ ks8695_wdt_start();
	121	+ return nonseekable_open(inode, file);
	122	+}
	123	+
	124	+/*
	125	+ * Close the watchdog device.
	126	+ * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
	127	+ * disabled.
	128	+ */
	129	+static int ks8695_wdt_close(struct inode inode, struct file file)
	130	+{
	131	+ if (!nowayout)
	132	+ ks8695_wdt_stop(); /* Disable the watchdog when file is closed */
	133	+
	134	+ clear_bit(0, &ks8695wdt_busy);
	135	+ return 0;
	136	+}
	137	+
	138	+static struct watchdog_info ks8695_wdt_info = {
	139	+ .identity = "ks8695 watchdog",
	140	+ .options = WDIOF_SETTIMEOUT \| WDIOF_KEEPALIVEPING,
	141	+};
	142	+
	143	+/*
	144	+ * Handle commands from user-space.
	145	+ */
	146	+static int ks8695_wdt_ioctl(struct inode inode, struct file file,
	147	+ unsigned int cmd, unsigned long arg)
	148	+{
	149	+ void __user argp = (void __user )arg;
	150	+ int __user *p = argp;
	151	+ int new_value;
	152	+
	153	+ switch(cmd) {
	154	+ case WDIOC_KEEPALIVE:
	155	+ ks8695_wdt_reload(); /* pat the watchdog */
	156	+ return 0;
	157	+
	158	+ case WDIOC_GETSUPPORT:
	159	+ return copy_to_user(argp, &ks8695_wdt_info, sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
	160	+
	161	+ case WDIOC_SETTIMEOUT:
	162	+ if (get_user(new_value, p))
	163	+ return -EFAULT;
	164	+
	165	+ if (ks8695_wdt_settimeout(new_value))
	166	+ return -EINVAL;
	167	+
	168	+ /* Enable new time value */
	169	+ ks8695_wdt_start();
	170	+
	171	+ /* Return current value */
	172	+ return put_user(wdt_time, p);
	173	+
	174	+ case WDIOC_GETTIMEOUT:
	175	+ return put_user(wdt_time, p);
	176	+
	177	+ case WDIOC_GETSTATUS:
	178	+ case WDIOC_GETBOOTSTATUS:
	179	+ return put_user(0, p);
	180	+
	181	+ case WDIOC_SETOPTIONS:
	182	+ if (get_user(new_value, p))
	183	+ return -EFAULT;
	184	+
	185	+ if (new_value & WDIOS_DISABLECARD)
	186	+ ks8695_wdt_stop();
	187	+ if (new_value & WDIOS_ENABLECARD)
	188	+ ks8695_wdt_start();
	189	+ return 0;
	190	+
	191	+ default:
	192	+ return -ENOTTY;
	193	+ }
	194	+}
	195	+
	196	+/*
	197	+ * Pat the watchdog whenever device is written to.
	198	+ */
	199	+static ssize_t ks8695_wdt_write(struct file file, const char data, size_t len, loff_t *ppos)
	200	+{
	201	+ ks8695_wdt_reload(); /* pat the watchdog */
	202	+ return len;
	203	+}
	204	+
	205	+/* ......................................................................... */
	206	+
	207	+static const struct file_operations ks8695wdt_fops = {
	208	+ .owner = THIS_MODULE,
	209	+ .llseek = no_llseek,
	210	+ .ioctl = ks8695_wdt_ioctl,
	211	+ .open = ks8695_wdt_open,
	212	+ .release = ks8695_wdt_close,
	213	+ .write = ks8695_wdt_write,
	214	+};
	215	+
	216	+static struct miscdevice ks8695wdt_miscdev = {
	217	+ .minor = WATCHDOG_MINOR,
	218	+ .name = "watchdog",
	219	+ .fops = &ks8695wdt_fops,
	220	+};
	221	+
	222	+static int __init ks8695wdt_probe(struct platform_device *pdev)
	223	+{
	224	+ int res;
	225	+
	226	+ if (ks8695wdt_miscdev.parent)
	227	+ return -EBUSY;
	228	+ ks8695wdt_miscdev.parent = &pdev->dev;
	229	+
	230	+ res = misc_register(&ks8695wdt_miscdev);
	231	+ if (res)
	232	+ return res;
	233	+
	234	+ printk("KS8695 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
	235	+ return 0;
	236	+}
	237	+
	238	+static int __exit ks8695wdt_remove(struct platform_device *pdev)
	239	+{
	240	+ int res;
	241	+
	242	+ res = misc_deregister(&ks8695wdt_miscdev);
	243	+ if (!res)
	244	+ ks8695wdt_miscdev.parent = NULL;
	245	+
	246	+ return res;
	247	+}
	248	+
	249	+static void ks8695wdt_shutdown(struct platform_device *pdev)
	250	+{
	251	+ ks8695_wdt_stop();
	252	+}
	253	+
	254	+#ifdef CONFIG_PM
	255	+
	256	+static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
	257	+{
	258	+ ks8695_wdt_stop();
	259	+ return 0;
	260	+}
	261	+
	262	+static int ks8695wdt_resume(struct platform_device *pdev)
	263	+{
	264	+ if (ks8695wdt_busy)
	265	+ ks8695_wdt_start();
	266	+ return 0;
	267	+}
	268	+
	269	+#else
	270	+#define ks8695wdt_suspend NULL
	271	+#define ks8695wdt_resume NULL
	272	+#endif
	273	+
	274	+static struct platform_driver ks8695wdt_driver = {
	275	+ .probe = ks8695wdt_probe,
	276	+ .remove = __exit_p(ks8695wdt_remove),
	277	+ .shutdown = ks8695wdt_shutdown,
	278	+ .suspend = ks8695wdt_suspend,
	279	+ .resume = ks8695wdt_resume,
	280	+ .driver = {
	281	+ .name = "ks8695_wdt",
	282	+ .owner = THIS_MODULE,
	283	+ },
	284	+};
	285	+
	286	+static int __init ks8695_wdt_init(void)
	287	+{
	288	+ /* Check that the heartbeat value is within range; if not reset to the default */
	289	+ if (ks8695_wdt_settimeout(wdt_time)) {
	290	+ ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
	291	+ pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", wdt_time, WDT_MAX_TIME);
	292	+ }
	293	+
	294	+ return platform_driver_register(&ks8695wdt_driver);
	295	+}
	296	+
	297	+static void __exit ks8695_wdt_exit(void)
	298	+{
	299	+ platform_driver_unregister(&ks8695wdt_driver);
	300	+}
	301	+
	302	+module_init(ks8695_wdt_init);
	303	+module_exit(ks8695_wdt_exit);
	304	+
	305	+MODULE_AUTHOR("Andrew Victor");
	306	+MODULE_DESCRIPTION("Watchdog driver for KS8695");
	307	+MODULE_LICENSE("GPL");
	308	+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);