James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 1 | /* |
| 2 | * mv64x60_wdt.c - MV64X60 (Marvell Discovery) watchdog userspace interface |
| 3 | * |
| 4 | * Author: James Chapman <jchapman@katalix.com> |
| 5 | * |
| 6 | * Platform-specific setup code should configure the dog to generate |
| 7 | * interrupt or reset as required. This code only enables/disables |
| 8 | * and services the watchdog. |
| 9 | * |
| 10 | * Derived from mpc8xx_wdt.c, with the following copyright. |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 11 | * |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 12 | * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under |
| 13 | * the terms of the GNU General Public License version 2. This program |
| 14 | * is licensed "as is" without any warranty of any kind, whether express |
| 15 | * or implied. |
| 16 | */ |
| 17 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 18 | #include <linux/fs.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/miscdevice.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/watchdog.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
Dale Farnsworth | 7e07a15 | 2007-07-24 11:12:24 -0700 | [diff] [blame] | 25 | #include <linux/mv643xx.h> |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 26 | #include <linux/uaccess.h> |
| 27 | #include <linux/io.h> |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 28 | |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 29 | #define MV64x60_WDT_WDC_OFFSET 0 |
| 30 | |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 31 | /* |
| 32 | * The watchdog configuration register contains a pair of 2-bit fields, |
| 33 | * 1. a reload field, bits 27-26, which triggers a reload of |
| 34 | * the countdown register, and |
| 35 | * 2. an enable field, bits 25-24, which toggles between |
| 36 | * enabling and disabling the watchdog timer. |
| 37 | * Bit 31 is a read-only field which indicates whether the |
| 38 | * watchdog timer is currently enabled. |
| 39 | * |
| 40 | * The low 24 bits contain the timer reload value. |
| 41 | */ |
| 42 | #define MV64x60_WDC_ENABLE_SHIFT 24 |
| 43 | #define MV64x60_WDC_SERVICE_SHIFT 26 |
| 44 | #define MV64x60_WDC_ENABLED_SHIFT 31 |
| 45 | |
| 46 | #define MV64x60_WDC_ENABLED_TRUE 1 |
| 47 | #define MV64x60_WDC_ENABLED_FALSE 0 |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 48 | |
| 49 | /* Flags bits */ |
| 50 | #define MV64x60_WDOG_FLAG_OPENED 0 |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 51 | |
| 52 | static unsigned long wdt_flags; |
| 53 | static int wdt_status; |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 54 | static void __iomem *mv64x60_wdt_regs; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 55 | static int mv64x60_wdt_timeout; |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 56 | static int mv64x60_wdt_count; |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 57 | static unsigned int bus_clk; |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 58 | static char expect_close; |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 59 | static DEFINE_SPINLOCK(mv64x60_wdt_spinlock); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 60 | |
Dale Farnsworth | d37a5c3 | 2007-07-24 11:17:23 -0700 | [diff] [blame] | 61 | static int nowayout = WATCHDOG_NOWAYOUT; |
| 62 | module_param(nowayout, int, 0); |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 63 | MODULE_PARM_DESC(nowayout, |
| 64 | "Watchdog cannot be stopped once started (default=" |
| 65 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
Dale Farnsworth | d37a5c3 | 2007-07-24 11:17:23 -0700 | [diff] [blame] | 66 | |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 67 | static int mv64x60_wdt_toggle_wdc(int enabled_predicate, int field_shift) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 68 | { |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 69 | u32 data; |
| 70 | u32 enabled; |
| 71 | int ret = 0; |
| 72 | |
| 73 | spin_lock(&mv64x60_wdt_spinlock); |
| 74 | data = readl(mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET); |
| 75 | enabled = (data >> MV64x60_WDC_ENABLED_SHIFT) & 1; |
| 76 | |
| 77 | /* only toggle the requested field if enabled state matches predicate */ |
| 78 | if ((enabled ^ enabled_predicate) == 0) { |
| 79 | /* We write a 1, then a 2 -- to the appropriate field */ |
| 80 | data = (1 << field_shift) | mv64x60_wdt_count; |
| 81 | writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET); |
| 82 | |
| 83 | data = (2 << field_shift) | mv64x60_wdt_count; |
| 84 | writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET); |
| 85 | ret = 1; |
| 86 | } |
| 87 | spin_unlock(&mv64x60_wdt_spinlock); |
| 88 | |
| 89 | return ret; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static void mv64x60_wdt_service(void) |
| 93 | { |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 94 | mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE, |
| 95 | MV64x60_WDC_SERVICE_SHIFT); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | static void mv64x60_wdt_handler_enable(void) |
| 99 | { |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 100 | if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_FALSE, |
| 101 | MV64x60_WDC_ENABLE_SHIFT)) { |
| 102 | mv64x60_wdt_service(); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 103 | printk(KERN_NOTICE "mv64x60_wdt: watchdog activated\n"); |
| 104 | } |
| 105 | } |
| 106 | |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 107 | static void mv64x60_wdt_handler_disable(void) |
| 108 | { |
| 109 | if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE, |
| 110 | MV64x60_WDC_ENABLE_SHIFT)) |
| 111 | printk(KERN_NOTICE "mv64x60_wdt: watchdog deactivated\n"); |
| 112 | } |
| 113 | |
| 114 | static void mv64x60_wdt_set_timeout(unsigned int timeout) |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 115 | { |
| 116 | /* maximum bus cycle count is 0xFFFFFFFF */ |
| 117 | if (timeout > 0xFFFFFFFF / bus_clk) |
| 118 | timeout = 0xFFFFFFFF / bus_clk; |
| 119 | |
Dale Farnsworth | f186999 | 2007-07-24 11:31:25 -0700 | [diff] [blame] | 120 | mv64x60_wdt_count = timeout * bus_clk >> 8; |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 121 | mv64x60_wdt_timeout = timeout; |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 122 | } |
| 123 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 124 | static int mv64x60_wdt_open(struct inode *inode, struct file *file) |
| 125 | { |
| 126 | if (test_and_set_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags)) |
| 127 | return -EBUSY; |
| 128 | |
Dale Farnsworth | d37a5c3 | 2007-07-24 11:17:23 -0700 | [diff] [blame] | 129 | if (nowayout) |
| 130 | __module_get(THIS_MODULE); |
| 131 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 132 | mv64x60_wdt_handler_enable(); |
| 133 | |
Dale Farnsworth | 861e51377 | 2007-07-24 11:13:26 -0700 | [diff] [blame] | 134 | return nonseekable_open(inode, file); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | static int mv64x60_wdt_release(struct inode *inode, struct file *file) |
| 138 | { |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 139 | if (expect_close == 42) |
Dale Farnsworth | d37a5c3 | 2007-07-24 11:17:23 -0700 | [diff] [blame] | 140 | mv64x60_wdt_handler_disable(); |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 141 | else { |
| 142 | printk(KERN_CRIT |
| 143 | "mv64x60_wdt: unexpected close, not stopping timer!\n"); |
| 144 | mv64x60_wdt_service(); |
| 145 | } |
| 146 | expect_close = 0; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 147 | |
| 148 | clear_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags); |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
Al Viro | b2846df | 2005-09-29 00:42:27 +0100 | [diff] [blame] | 153 | static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data, |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 154 | size_t len, loff_t *ppos) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 155 | { |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 156 | if (len) { |
| 157 | if (!nowayout) { |
| 158 | size_t i; |
| 159 | |
| 160 | expect_close = 0; |
| 161 | |
| 162 | for (i = 0; i != len; i++) { |
| 163 | char c; |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 164 | if (get_user(c, data + i)) |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 165 | return -EFAULT; |
| 166 | if (c == 'V') |
| 167 | expect_close = 42; |
| 168 | } |
| 169 | } |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 170 | mv64x60_wdt_service(); |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 171 | } |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 172 | |
| 173 | return len; |
| 174 | } |
| 175 | |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 176 | static long mv64x60_wdt_ioctl(struct file *file, |
| 177 | unsigned int cmd, unsigned long arg) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 178 | { |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 179 | int timeout; |
Dale Farnsworth | 85d57238d | 2007-07-24 11:16:29 -0700 | [diff] [blame] | 180 | int options; |
Al Viro | b2846df | 2005-09-29 00:42:27 +0100 | [diff] [blame] | 181 | void __user *argp = (void __user *)arg; |
Wim Van Sebroeck | 42747d7 | 2009-12-26 18:55:22 +0000 | [diff] [blame] | 182 | static const struct watchdog_info info = { |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 183 | .options = WDIOF_SETTIMEOUT | |
Dale Farnsworth | bf2fc92 | 2007-07-24 11:18:14 -0700 | [diff] [blame] | 184 | WDIOF_MAGICCLOSE | |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 185 | WDIOF_KEEPALIVEPING, |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 186 | .firmware_version = 0, |
| 187 | .identity = "MV64x60 watchdog", |
| 188 | }; |
| 189 | |
| 190 | switch (cmd) { |
| 191 | case WDIOC_GETSUPPORT: |
Al Viro | b2846df | 2005-09-29 00:42:27 +0100 | [diff] [blame] | 192 | if (copy_to_user(argp, &info, sizeof(info))) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 193 | return -EFAULT; |
| 194 | break; |
| 195 | |
| 196 | case WDIOC_GETSTATUS: |
| 197 | case WDIOC_GETBOOTSTATUS: |
Al Viro | b2846df | 2005-09-29 00:42:27 +0100 | [diff] [blame] | 198 | if (put_user(wdt_status, (int __user *)argp)) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 199 | return -EFAULT; |
| 200 | wdt_status &= ~WDIOF_KEEPALIVEPING; |
| 201 | break; |
| 202 | |
| 203 | case WDIOC_GETTEMP: |
| 204 | return -EOPNOTSUPP; |
| 205 | |
| 206 | case WDIOC_SETOPTIONS: |
Dale Farnsworth | 85d57238d | 2007-07-24 11:16:29 -0700 | [diff] [blame] | 207 | if (get_user(options, (int __user *)argp)) |
| 208 | return -EFAULT; |
| 209 | |
| 210 | if (options & WDIOS_DISABLECARD) |
| 211 | mv64x60_wdt_handler_disable(); |
| 212 | |
| 213 | if (options & WDIOS_ENABLECARD) |
| 214 | mv64x60_wdt_handler_enable(); |
| 215 | break; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 216 | |
| 217 | case WDIOC_KEEPALIVE: |
| 218 | mv64x60_wdt_service(); |
| 219 | wdt_status |= WDIOF_KEEPALIVEPING; |
| 220 | break; |
| 221 | |
| 222 | case WDIOC_SETTIMEOUT: |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 223 | if (get_user(timeout, (int __user *)argp)) |
| 224 | return -EFAULT; |
| 225 | mv64x60_wdt_set_timeout(timeout); |
| 226 | /* Fall through */ |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 227 | |
| 228 | case WDIOC_GETTIMEOUT: |
Dale Farnsworth | 264f099 | 2007-07-24 11:14:21 -0700 | [diff] [blame] | 229 | if (put_user(mv64x60_wdt_timeout, (int __user *)argp)) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 230 | return -EFAULT; |
| 231 | break; |
| 232 | |
| 233 | default: |
Samuel Tardieu | 795b89d | 2006-09-09 17:34:31 +0200 | [diff] [blame] | 234 | return -ENOTTY; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 240 | static const struct file_operations mv64x60_wdt_fops = { |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 241 | .owner = THIS_MODULE, |
| 242 | .llseek = no_llseek, |
| 243 | .write = mv64x60_wdt_write, |
Alan Cox | a86b849 | 2008-05-19 14:07:26 +0100 | [diff] [blame] | 244 | .unlocked_ioctl = mv64x60_wdt_ioctl, |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 245 | .open = mv64x60_wdt_open, |
| 246 | .release = mv64x60_wdt_release, |
| 247 | }; |
| 248 | |
| 249 | static struct miscdevice mv64x60_wdt_miscdev = { |
| 250 | .minor = WATCHDOG_MINOR, |
| 251 | .name = "watchdog", |
| 252 | .fops = &mv64x60_wdt_fops, |
| 253 | }; |
| 254 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 255 | static int __devinit mv64x60_wdt_probe(struct platform_device *dev) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 256 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 257 | struct mv64x60_wdt_pdata *pdata = dev->dev.platform_data; |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 258 | struct resource *r; |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 259 | int timeout = 10; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 260 | |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 261 | bus_clk = 133; /* in MHz */ |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 262 | if (pdata) { |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 263 | timeout = pdata->timeout; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 264 | bus_clk = pdata->bus_clk; |
| 265 | } |
| 266 | |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 267 | /* Since bus_clk is truncated MHz, actual frequency could be |
| 268 | * up to 1MHz higher. Round up, since it's better to time out |
| 269 | * too late than too soon. |
| 270 | */ |
| 271 | bus_clk++; |
| 272 | bus_clk *= 1000000; /* convert to Hz */ |
| 273 | |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 274 | r = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 275 | if (!r) |
| 276 | return -ENODEV; |
| 277 | |
H Hartley Sweeten | b782a56 | 2009-12-04 12:24:04 -0500 | [diff] [blame] | 278 | mv64x60_wdt_regs = ioremap(r->start, resource_size(r)); |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 279 | if (mv64x60_wdt_regs == NULL) |
| 280 | return -ENOMEM; |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 281 | |
Dale Farnsworth | 94796f9 | 2007-07-24 11:15:26 -0700 | [diff] [blame] | 282 | mv64x60_wdt_set_timeout(timeout); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 283 | |
Dale Farnsworth | 2422df5 | 2007-07-24 11:19:47 -0700 | [diff] [blame] | 284 | mv64x60_wdt_handler_disable(); /* in case timer was already running */ |
| 285 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 286 | return misc_register(&mv64x60_wdt_miscdev); |
| 287 | } |
| 288 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 289 | static int __devexit mv64x60_wdt_remove(struct platform_device *dev) |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 290 | { |
| 291 | misc_deregister(&mv64x60_wdt_miscdev); |
| 292 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 293 | mv64x60_wdt_handler_disable(); |
| 294 | |
Dale Farnsworth | 8a5cfa64 | 2007-07-24 11:09:18 -0700 | [diff] [blame] | 295 | iounmap(mv64x60_wdt_regs); |
| 296 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 300 | static struct platform_driver mv64x60_wdt_driver = { |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 301 | .probe = mv64x60_wdt_probe, |
| 302 | .remove = __devexit_p(mv64x60_wdt_remove), |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 303 | .driver = { |
| 304 | .owner = THIS_MODULE, |
| 305 | .name = MV64x60_WDT_NAME, |
| 306 | }, |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 307 | }; |
| 308 | |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 309 | static int __init mv64x60_wdt_init(void) |
| 310 | { |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 311 | printk(KERN_INFO "MV64x60 watchdog driver\n"); |
| 312 | |
Dale Farnsworth | 422db8d | 2007-07-24 11:07:38 -0700 | [diff] [blame] | 313 | return platform_driver_register(&mv64x60_wdt_driver); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 314 | } |
| 315 | |
| 316 | static void __exit mv64x60_wdt_exit(void) |
| 317 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 318 | platform_driver_unregister(&mv64x60_wdt_driver); |
James Chapman | 3be1021 | 2005-08-17 09:01:33 +0200 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | module_init(mv64x60_wdt_init); |
| 322 | module_exit(mv64x60_wdt_exit); |
| 323 | |
| 324 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); |
| 325 | MODULE_DESCRIPTION("MV64x60 watchdog driver"); |
| 326 | MODULE_LICENSE("GPL"); |
| 327 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |
Kay Sievers | f37d193 | 2008-04-10 21:29:23 -0700 | [diff] [blame] | 328 | MODULE_ALIAS("platform:" MV64x60_WDT_NAME); |