[linux-block.git] / drivers / watchdog / ar7_wdt.c

/*
 * drivers/watchdog/ar7_wdt.c
 *
 * Copyright (C) 2007 Nicolas Thill <nico@openwrt.org>
 * Copyright (c) 2005 Enrik Berkhan <Enrik.Berkhan@akk.org>
 *
 * Some code taken from:
 * National Semiconductor SCx200 Watchdog support
 * Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/platform_device.h>
#include <linux/watchdog.h>
#include <linux/fs.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/clk.h>

#include <asm/addrspace.h>
#include <asm/mach-ar7/ar7.h>

#define LONGNAME "TI AR7 Watchdog Timer"

MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
MODULE_DESCRIPTION(LONGNAME);
MODULE_LICENSE("GPL");

static int margin = 60;
module_param(margin, int, 0);
MODULE_PARM_DESC(margin, "Watchdog margin in seconds");

static bool nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");

#define READ_REG(x) readl((void __iomem *)&(x))
#define WRITE_REG(x, v) writel((v), (void __iomem *)&(x))

struct ar7_wdt {
	u32 kick_lock;
	u32 kick;
	u32 change_lock;
	u32 change;
	u32 disable_lock;
	u32 disable;
	u32 prescale_lock;
	u32 prescale;
};

static unsigned long wdt_is_open;
static unsigned expect_close;
static DEFINE_SPINLOCK(wdt_lock);

/* XXX currently fixed, allows max margin ~68.72 secs */
#define prescale_value 0xffff

/* Resource of the WDT registers */
static struct resource *ar7_regs_wdt;
/* Pointer to the remapped WDT IO space */
static struct ar7_wdt *ar7_wdt;

static struct clk *vbus_clk;

static void ar7_wdt_kick(u32 value)
{
	WRITE_REG(ar7_wdt->kick_lock, 0x5555);
	if ((READ_REG(ar7_wdt->kick_lock) & 3) == 1) {
		WRITE_REG(ar7_wdt->kick_lock, 0xaaaa);
		if ((READ_REG(ar7_wdt->kick_lock) & 3) == 3) {
			WRITE_REG(ar7_wdt->kick, value);
			return;
		}
	}
	pr_err("failed to unlock WDT kick reg\n");
}

static void ar7_wdt_prescale(u32 value)
{
	WRITE_REG(ar7_wdt->prescale_lock, 0x5a5a);
	if ((READ_REG(ar7_wdt->prescale_lock) & 3) == 1) {
		WRITE_REG(ar7_wdt->prescale_lock, 0xa5a5);
		if ((READ_REG(ar7_wdt->prescale_lock) & 3) == 3) {
			WRITE_REG(ar7_wdt->prescale, value);
			return;
		}
	}
	pr_err("failed to unlock WDT prescale reg\n");
}

static void ar7_wdt_change(u32 value)
{
	WRITE_REG(ar7_wdt->change_lock, 0x6666);
	if ((READ_REG(ar7_wdt->change_lock) & 3) == 1) {
		WRITE_REG(ar7_wdt->change_lock, 0xbbbb);
		if ((READ_REG(ar7_wdt->change_lock) & 3) == 3) {
			WRITE_REG(ar7_wdt->change, value);
			return;
		}
	}
	pr_err("failed to unlock WDT change reg\n");
}

static void ar7_wdt_disable(u32 value)
{
	WRITE_REG(ar7_wdt->disable_lock, 0x7777);
	if ((READ_REG(ar7_wdt->disable_lock) & 3) == 1) {
		WRITE_REG(ar7_wdt->disable_lock, 0xcccc);
		if ((READ_REG(ar7_wdt->disable_lock) & 3) == 2) {
			WRITE_REG(ar7_wdt->disable_lock, 0xdddd);
			if ((READ_REG(ar7_wdt->disable_lock) & 3) == 3) {
				WRITE_REG(ar7_wdt->disable, value);
				return;
			}
		}
	}
	pr_err("failed to unlock WDT disable reg\n");
}

static void ar7_wdt_update_margin(int new_margin)
{
	u32 change;
	u32 vbus_rate;

	vbus_rate = clk_get_rate(vbus_clk);
	change = new_margin * (vbus_rate / prescale_value);
	if (change < 1)
		change = 1;
	if (change > 0xffff)
		change = 0xffff;
	ar7_wdt_change(change);
	margin = change * prescale_value / vbus_rate;
	pr_info("timer margin %d seconds (prescale %d, change %d, freq %d)\n",
		margin, prescale_value, change, vbus_rate);
}

static void ar7_wdt_enable_wdt(void)
{
	pr_debug("enabling watchdog timer\n");
	ar7_wdt_disable(1);
	ar7_wdt_kick(1);
}

static void ar7_wdt_disable_wdt(void)
{
	pr_debug("disabling watchdog timer\n");
	ar7_wdt_disable(0);
}

static int ar7_wdt_open(struct inode *inode, struct file *file)
{
	/* only allow one at a time */
	if (test_and_set_bit(0, &wdt_is_open))
		return -EBUSY;
	ar7_wdt_enable_wdt();
	expect_close = 0;

	return nonseekable_open(inode, file);
}

static int ar7_wdt_release(struct inode *inode, struct file *file)
{
	if (!expect_close)
		pr_warn("watchdog device closed unexpectedly, will not disable the watchdog timer\n");
	else if (!nowayout)
		ar7_wdt_disable_wdt();
	clear_bit(0, &wdt_is_open);
	return 0;
}

static ssize_t ar7_wdt_write(struct file *file, const char *data,
			     size_t len, loff_t *ppos)
{
	/* check for a magic close character */
	if (len) {
		size_t i;

		spin_lock(&wdt_lock);
		ar7_wdt_kick(1);
		spin_unlock(&wdt_lock);

		expect_close = 0;
		for (i = 0; i < len; ++i) {
			char c;
			if (get_user(c, data + i))
				return -EFAULT;
			if (c == 'V')
				expect_close = 1;
		}

	}
	return len;
}

static long ar7_wdt_ioctl(struct file *file,
					unsigned int cmd, unsigned long arg)
{
	static const struct watchdog_info ident = {
		.identity = LONGNAME,
		.firmware_version = 1,
		.options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
						WDIOF_MAGICCLOSE),
	};
	int new_margin;

	switch (cmd) {
	case WDIOC_GETSUPPORT:
		if (copy_to_user((struct watchdog_info *)arg, &ident,
				sizeof(ident)))
			return -EFAULT;
		return 0;
	case WDIOC_GETSTATUS:
	case WDIOC_GETBOOTSTATUS:
		if (put_user(0, (int *)arg))
			return -EFAULT;
		return 0;
	case WDIOC_KEEPALIVE:
		ar7_wdt_kick(1);
		return 0;
	case WDIOC_SETTIMEOUT:
		if (get_user(new_margin, (int *)arg))
			return -EFAULT;
		if (new_margin < 1)
			return -EINVAL;

		spin_lock(&wdt_lock);
		ar7_wdt_update_margin(new_margin);
		ar7_wdt_kick(1);
		spin_unlock(&wdt_lock);

	case WDIOC_GETTIMEOUT:
		if (put_user(margin, (int *)arg))
			return -EFAULT;
		return 0;
	default:
		return -ENOTTY;
	}
}

static const struct file_operations ar7_wdt_fops = {
	.owner		= THIS_MODULE,
	.write		= ar7_wdt_write,
	.unlocked_ioctl	= ar7_wdt_ioctl,
	.open		= ar7_wdt_open,
	.release	= ar7_wdt_release,
	.llseek		= no_llseek,
};

static struct miscdevice ar7_wdt_miscdev = {
	.minor		= WATCHDOG_MINOR,
	.name		= "watchdog",
	.fops		= &ar7_wdt_fops,
};

static int ar7_wdt_probe(struct platform_device *pdev)
{
	int rc;

	ar7_regs_wdt =
		platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
	ar7_wdt = devm_ioremap_resource(&pdev->dev, ar7_regs_wdt);
	if (IS_ERR(ar7_wdt))
		return PTR_ERR(ar7_wdt);

	vbus_clk = clk_get(NULL, "vbus");
	if (IS_ERR(vbus_clk)) {
		pr_err("could not get vbus clock\n");
		return PTR_ERR(vbus_clk);
	}

	ar7_wdt_disable_wdt();
	ar7_wdt_prescale(prescale_value);
	ar7_wdt_update_margin(margin);

	rc = misc_register(&ar7_wdt_miscdev);
	if (rc) {
		pr_err("unable to register misc device\n");
		goto out;
	}
	return 0;

out:
	clk_put(vbus_clk);
	vbus_clk = NULL;
	return rc;
}

static int ar7_wdt_remove(struct platform_device *pdev)
{
	misc_deregister(&ar7_wdt_miscdev);
	clk_put(vbus_clk);
	vbus_clk = NULL;
	return 0;
}

static void ar7_wdt_shutdown(struct platform_device *pdev)
{
	if (!nowayout)
		ar7_wdt_disable_wdt();
}

static struct platform_driver ar7_wdt_driver = {
	.probe = ar7_wdt_probe,
	.remove = ar7_wdt_remove,
	.shutdown = ar7_wdt_shutdown,
	.driver = {
		.owner = THIS_MODULE,
		.name = "ar7_wdt",
	},
};

module_platform_driver(ar7_wdt_driver);
Commit	Line	Data
c283cf2c MC	1	/*
	2	* drivers/watchdog/ar7_wdt.c
	3	*
	4	* Copyright (C) 2007 Nicolas Thill <nico@openwrt.org>
	5	* Copyright (c) 2005 Enrik Berkhan <Enrik.Berkhan@akk.org>
	6	*
	7	* Some code taken from:
	8	* National Semiconductor SCx200 Watchdog support
	9	* Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	24	*/
	25
27c766aa JP	26	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27c766aa JP	27
c283cf2c MC	28	#include <linux/module.h>
	29	#include <linux/moduleparam.h>
	30	#include <linux/errno.h>
	31	#include <linux/init.h>
	32	#include <linux/miscdevice.h>
64d4062a	33	#include <linux/platform_device.h>
c283cf2c	34	#include <linux/watchdog.h>
c283cf2c MC	35	#include <linux/fs.h>
	36	#include <linux/ioport.h>
	37	#include <linux/io.h>
	38	#include <linux/uaccess.h>
780019dd	39	#include <linux/clk.h>
c283cf2c MC	40
c283cf2c MC	41	#include <asm/addrspace.h>
c5e7f5a3	42	#include <asm/mach-ar7/ar7.h>
c283cf2c	43
c283cf2c MC	44	#define LONGNAME "TI AR7 Watchdog Timer"
	45
	46	MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
	47	MODULE_DESCRIPTION(LONGNAME);
	48	MODULE_LICENSE("GPL");
c283cf2c MC	49
	50	static int margin = 60;
	51	module_param(margin, int, 0);
	52	MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
	53
86a1e189 WVS	54	static bool nowayout = WATCHDOG_NOWAYOUT;
86a1e189 WVS	55	module_param(nowayout, bool, 0);
c283cf2c MC	56	MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
	57
	58	#define READ_REG(x) readl((void __iomem *)&(x))
	59	#define WRITE_REG(x, v) writel((v), (void __iomem *)&(x))
	60
	61	struct ar7_wdt {
	62	u32 kick_lock;
	63	u32 kick;
	64	u32 change_lock;
	65	u32 change;
	66	u32 disable_lock;
	67	u32 disable;
	68	u32 prescale_lock;
	69	u32 prescale;
	70	};
	71
670d59c0	72	static unsigned long wdt_is_open;
c283cf2c	73	static unsigned expect_close;
1334f329	74	static DEFINE_SPINLOCK(wdt_lock);
c283cf2c MC	75
	76	/* XXX currently fixed, allows max margin ~68.72 secs */
	77	#define prescale_value 0xffff
	78
64d4062a FF	79	/* Resource of the WDT registers */
64d4062a FF	80	static struct resource *ar7_regs_wdt;
c283cf2c MC	81	/* Pointer to the remapped WDT IO space */
c283cf2c MC	82	static struct ar7_wdt *ar7_wdt;
c283cf2c	83
780019dd FF	84	static struct clk *vbus_clk;
780019dd FF	85
c283cf2c MC	86	static void ar7_wdt_kick(u32 value)
	87	{
	88	WRITE_REG(ar7_wdt->kick_lock, 0x5555);
	89	if ((READ_REG(ar7_wdt->kick_lock) & 3) == 1) {
	90	WRITE_REG(ar7_wdt->kick_lock, 0xaaaa);
	91	if ((READ_REG(ar7_wdt->kick_lock) & 3) == 3) {
	92	WRITE_REG(ar7_wdt->kick, value);
	93	return;
	94	}
	95	}
27c766aa	96	pr_err("failed to unlock WDT kick reg\n");
c283cf2c MC	97	}
	98
	99	static void ar7_wdt_prescale(u32 value)
	100	{
	101	WRITE_REG(ar7_wdt->prescale_lock, 0x5a5a);
	102	if ((READ_REG(ar7_wdt->prescale_lock) & 3) == 1) {
	103	WRITE_REG(ar7_wdt->prescale_lock, 0xa5a5);
	104	if ((READ_REG(ar7_wdt->prescale_lock) & 3) == 3) {
	105	WRITE_REG(ar7_wdt->prescale, value);
	106	return;
	107	}
	108	}
27c766aa	109	pr_err("failed to unlock WDT prescale reg\n");
c283cf2c MC	110	}
	111
	112	static void ar7_wdt_change(u32 value)
	113	{
	114	WRITE_REG(ar7_wdt->change_lock, 0x6666);
	115	if ((READ_REG(ar7_wdt->change_lock) & 3) == 1) {
	116	WRITE_REG(ar7_wdt->change_lock, 0xbbbb);
	117	if ((READ_REG(ar7_wdt->change_lock) & 3) == 3) {
	118	WRITE_REG(ar7_wdt->change, value);
	119	return;
	120	}
	121	}
27c766aa	122	pr_err("failed to unlock WDT change reg\n");
c283cf2c MC	123	}
	124
	125	static void ar7_wdt_disable(u32 value)
	126	{
	127	WRITE_REG(ar7_wdt->disable_lock, 0x7777);
	128	if ((READ_REG(ar7_wdt->disable_lock) & 3) == 1) {
	129	WRITE_REG(ar7_wdt->disable_lock, 0xcccc);
	130	if ((READ_REG(ar7_wdt->disable_lock) & 3) == 2) {
	131	WRITE_REG(ar7_wdt->disable_lock, 0xdddd);
	132	if ((READ_REG(ar7_wdt->disable_lock) & 3) == 3) {
	133	WRITE_REG(ar7_wdt->disable, value);
	134	return;
	135	}
	136	}
	137	}
27c766aa	138	pr_err("failed to unlock WDT disable reg\n");
c283cf2c MC	139	}
	140
	141	static void ar7_wdt_update_margin(int new_margin)
	142	{
	143	u32 change;
780019dd	144	u32 vbus_rate;
c283cf2c	145
780019dd FF	146	vbus_rate = clk_get_rate(vbus_clk);
780019dd FF	147	change = new_margin * (vbus_rate / prescale_value);
670d59c0 AC	148	if (change < 1)
	149	change = 1;
	150	if (change > 0xffff)
	151	change = 0xffff;
c283cf2c	152	ar7_wdt_change(change);
780019dd	153	margin = change * prescale_value / vbus_rate;
27c766aa JP	154	pr_info("timer margin %d seconds (prescale %d, change %d, freq %d)\n",
27c766aa JP	155	margin, prescale_value, change, vbus_rate);
c283cf2c MC	156	}
	157
	158	static void ar7_wdt_enable_wdt(void)
	159	{
27c766aa	160	pr_debug("enabling watchdog timer\n");
c283cf2c MC	161	ar7_wdt_disable(1);
	162	ar7_wdt_kick(1);
	163	}
	164
	165	static void ar7_wdt_disable_wdt(void)
	166	{
27c766aa	167	pr_debug("disabling watchdog timer\n");
c283cf2c MC	168	ar7_wdt_disable(0);
	169	}
	170
	171	static int ar7_wdt_open(struct inode inode, struct file file)
	172	{
	173	/* only allow one at a time */
670d59c0	174	if (test_and_set_bit(0, &wdt_is_open))
c283cf2c MC	175	return -EBUSY;
	176	ar7_wdt_enable_wdt();
	177	expect_close = 0;
	178
	179	return nonseekable_open(inode, file);
	180	}
	181
	182	static int ar7_wdt_release(struct inode inode, struct file file)
	183	{
	184	if (!expect_close)
27c766aa	185	pr_warn("watchdog device closed unexpectedly, will not disable the watchdog timer\n");
c283cf2c MC	186	else if (!nowayout)
c283cf2c MC	187	ar7_wdt_disable_wdt();
670d59c0	188	clear_bit(0, &wdt_is_open);
c283cf2c MC	189	return 0;
	190	}
	191
c283cf2c MC	192	static ssize_t ar7_wdt_write(struct file file, const char data,
	193	size_t len, loff_t *ppos)
	194	{
	195	/* check for a magic close character */
	196	if (len) {
	197	size_t i;
	198
670d59c0	199	spin_lock(&wdt_lock);
c283cf2c	200	ar7_wdt_kick(1);
670d59c0	201	spin_unlock(&wdt_lock);
c283cf2c MC	202
	203	expect_close = 0;
	204	for (i = 0; i < len; ++i) {
	205	char c;
7944d3a5	206	if (get_user(c, data + i))
c283cf2c MC	207	return -EFAULT;
	208	if (c == 'V')
	209	expect_close = 1;
	210	}
	211
	212	}
	213	return len;
	214	}
	215
670d59c0 AC	216	static long ar7_wdt_ioctl(struct file *file,
670d59c0 AC	217	unsigned int cmd, unsigned long arg)
c283cf2c	218	{
42747d71	219	static const struct watchdog_info ident = {
c283cf2c MC	220	.identity = LONGNAME,
c283cf2c MC	221	.firmware_version = 1,
e73a7802 WVS	222	.options = (WDIOF_SETTIMEOUT \| WDIOF_KEEPALIVEPING \|
e73a7802 WVS	223	WDIOF_MAGICCLOSE),
c283cf2c MC	224	};
	225	int new_margin;
	226
	227	switch (cmd) {
c283cf2c MC	228	case WDIOC_GETSUPPORT:
	229	if (copy_to_user((struct watchdog_info *)arg, &ident,
	230	sizeof(ident)))
	231	return -EFAULT;
	232	return 0;
	233	case WDIOC_GETSTATUS:
	234	case WDIOC_GETBOOTSTATUS:
	235	if (put_user(0, (int *)arg))
	236	return -EFAULT;
	237	return 0;
	238	case WDIOC_KEEPALIVE:
	239	ar7_wdt_kick(1);
	240	return 0;
	241	case WDIOC_SETTIMEOUT:
	242	if (get_user(new_margin, (int *)arg))
	243	return -EFAULT;
	244	if (new_margin < 1)
	245	return -EINVAL;
	246
670d59c0	247	spin_lock(&wdt_lock);
c283cf2c MC	248	ar7_wdt_update_margin(new_margin);
c283cf2c MC	249	ar7_wdt_kick(1);
670d59c0	250	spin_unlock(&wdt_lock);
c283cf2c MC	251
	252	case WDIOC_GETTIMEOUT:
	253	if (put_user(margin, (int *)arg))
	254	return -EFAULT;
	255	return 0;
0c06090c WVS	256	default:
0c06090c WVS	257	return -ENOTTY;
c283cf2c MC	258	}
	259	}
	260
b47a166e	261	static const struct file_operations ar7_wdt_fops = {
c283cf2c MC	262	.owner = THIS_MODULE,
c283cf2c MC	263	.write = ar7_wdt_write,
670d59c0	264	.unlocked_ioctl = ar7_wdt_ioctl,
c283cf2c MC	265	.open = ar7_wdt_open,
c283cf2c MC	266	.release = ar7_wdt_release,
6038f373	267	.llseek = no_llseek,
c283cf2c MC	268	};
	269
	270	static struct miscdevice ar7_wdt_miscdev = {
	271	.minor = WATCHDOG_MINOR,
	272	.name = "watchdog",
	273	.fops = &ar7_wdt_fops,
	274	};
	275
2d991a16	276	static int ar7_wdt_probe(struct platform_device *pdev)
c283cf2c MC	277	{
	278	int rc;
	279
64d4062a FF	280	ar7_regs_wdt =
64d4062a FF	281	platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
4c271bb6 TR	282	ar7_wdt = devm_ioremap_resource(&pdev->dev, ar7_regs_wdt);
	283	if (IS_ERR(ar7_wdt))
	284	return PTR_ERR(ar7_wdt);
c283cf2c	285
780019dd FF	286	vbus_clk = clk_get(NULL, "vbus");
780019dd FF	287	if (IS_ERR(vbus_clk)) {
27c766aa	288	pr_err("could not get vbus clock\n");
ae21cc20	289	return PTR_ERR(vbus_clk);
780019dd FF	290	}
780019dd FF	291
c283cf2c MC	292	ar7_wdt_disable_wdt();
	293	ar7_wdt_prescale(prescale_value);
	294	ar7_wdt_update_margin(margin);
	295
c283cf2c MC	296	rc = misc_register(&ar7_wdt_miscdev);
c283cf2c MC	297	if (rc) {
27c766aa	298	pr_err("unable to register misc device\n");
ae21cc20	299	goto out;
c283cf2c	300	}
ae21cc20	301	return 0;
c283cf2c	302
c283cf2c	303	out:
ae21cc20 JL	304	clk_put(vbus_clk);
ae21cc20 JL	305	vbus_clk = NULL;
c283cf2c MC	306	return rc;
	307	}
	308
4b12b896	309	static int ar7_wdt_remove(struct platform_device *pdev)
c283cf2c MC	310	{
c283cf2c MC	311	misc_deregister(&ar7_wdt_miscdev);
ae21cc20 JL	312	clk_put(vbus_clk);
ae21cc20 JL	313	vbus_clk = NULL;
64d4062a FF	314	return 0;
	315	}
	316
	317	static void ar7_wdt_shutdown(struct platform_device *pdev)
	318	{
	319	if (!nowayout)
	320	ar7_wdt_disable_wdt();
	321	}
	322
	323	static struct platform_driver ar7_wdt_driver = {
	324	.probe = ar7_wdt_probe,
82268714	325	.remove = ar7_wdt_remove,
64d4062a FF	326	.shutdown = ar7_wdt_shutdown,
	327	.driver = {
	328	.owner = THIS_MODULE,
	329	.name = "ar7_wdt",
	330	},
	331	};
	332
b8ec6118	333	module_platform_driver(ar7_wdt_driver);