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authorWim Van Sebroeck <wim@iguana.be>2009-03-19 22:02:44 +0300
committerWim Van Sebroeck <wim@iguana.be>2009-03-25 12:10:45 +0300
commit0426fd0d88a595a8ab18e0cd69bdfe82a4d15115 (patch)
treed3c59b73a3fa16880f9d0d8b4f50996d5944ddec /drivers/watchdog
parent04bedfa542d90ac7a1bbf28287e9861d0da21576 (diff)
downloadlinux-0426fd0d88a595a8ab18e0cd69bdfe82a4d15115.tar.xz
[WATCHDOG] i6300esb.c: convert to platform device driver
Convert the Intel 6300ESB watchdog timer to a platform device driver. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/i6300esb.c90
1 files changed, 57 insertions, 33 deletions
diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c
index 97ac6bf42224..fbe852853248 100644
--- a/drivers/watchdog/i6300esb.c
+++ b/drivers/watchdog/i6300esb.c
@@ -13,7 +13,7 @@
*
* The timer is implemented in the following I/O controller hubs:
* (See the intel documentation on http://developer.intel.com.)
- * 6300ESB chip : document number 300641-003
+ * 6300ESB chip : document number 300641-004
*
* 2004YYZZ Ross Biro
* Initial version 0.01
@@ -34,7 +34,7 @@
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
-#include <linux/reboot.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/ioport.h>
@@ -42,7 +42,7 @@
#include <linux/io.h>
/* Module and version information */
-#define ESB_VERSION "0.03"
+#define ESB_VERSION "0.04"
#define ESB_MODULE_NAME "i6300ESB timer"
#define ESB_DRIVER_NAME ESB_MODULE_NAME ", v" ESB_VERSION
#define PFX ESB_MODULE_NAME ": "
@@ -81,6 +81,8 @@ static unsigned long timer_alive;
static struct pci_dev *esb_pci;
static unsigned short triggered; /* The status of the watchdog upon boot */
static char esb_expect_close;
+static struct platform_device *esb_platform_device;
+
/* module parameters */
/* 30 sec default heartbeat (1 < heartbeat < 2*1023) */
@@ -320,19 +322,6 @@ static long esb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
/*
- * Notify system
- */
-
-static int esb_notify_sys(struct notifier_block *this,
- unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- esb_timer_stop(); /* Turn the WDT off */
-
- return NOTIFY_DONE;
-}
-
-/*
* Kernel Interfaces
*/
@@ -351,10 +340,6 @@ static struct miscdevice esb_miscdev = {
.fops = &esb_fops,
};
-static struct notifier_block esb_notifier = {
- .notifier_call = esb_notify_sys,
-};
-
/*
* Data for PCI driver interface
*
@@ -373,7 +358,7 @@ MODULE_DEVICE_TABLE(pci, esb_pci_tbl);
* Init & exit routines
*/
-static unsigned char __init esb_getdevice(void)
+static unsigned char __devinit esb_getdevice(void)
{
u8 val1;
unsigned short val2;
@@ -444,7 +429,7 @@ err_devput:
return 0;
}
-static int __init watchdog_init(void)
+static int __devinit esb_probe(struct platform_device *dev)
{
int ret;
@@ -460,19 +445,13 @@ static int __init watchdog_init(void)
"heartbeat value must be 1<heartbeat<2046, using %d\n",
heartbeat);
}
- ret = register_reboot_notifier(&esb_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX
- "cannot register reboot notifier (err=%d)\n", ret);
- goto err_unmap;
- }
ret = misc_register(&esb_miscdev);
if (ret != 0) {
printk(KERN_ERR PFX
"cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
- goto err_notifier;
+ goto err_unmap;
}
esb_timer_stop();
printk(KERN_INFO PFX
@@ -480,8 +459,6 @@ static int __init watchdog_init(void)
BASEADDR, heartbeat, nowayout);
return 0;
-err_notifier:
- unregister_reboot_notifier(&esb_notifier);
err_unmap:
iounmap(BASEADDR);
/* err_release: */
@@ -493,7 +470,7 @@ err_unmap:
return ret;
}
-static void __exit watchdog_cleanup(void)
+static int __devexit esb_remove(struct platform_device *dev)
{
/* Stop the timer before we leave */
if (!nowayout)
@@ -501,11 +478,58 @@ static void __exit watchdog_cleanup(void)
/* Deregister */
misc_deregister(&esb_miscdev);
- unregister_reboot_notifier(&esb_notifier);
iounmap(BASEADDR);
pci_release_region(esb_pci, 0);
pci_disable_device(esb_pci);
pci_dev_put(esb_pci);
+ return 0;
+}
+
+static void esb_shutdown(struct platform_device *dev)
+{
+ esb_timer_stop();
+}
+
+static struct platform_driver esb_platform_driver = {
+ .probe = esb_probe,
+ .remove = __devexit_p(esb_remove),
+ .shutdown = esb_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = ESB_MODULE_NAME,
+ },
+};
+
+static int __init watchdog_init(void)
+{
+ int err;
+
+ printk(KERN_INFO PFX "Intel 6300ESB WatchDog Timer Driver v%s\n",
+ ESB_VERSION);
+
+ err = platform_driver_register(&esb_platform_driver);
+ if (err)
+ return err;
+
+ esb_platform_device = platform_device_register_simple(ESB_MODULE_NAME,
+ -1, NULL, 0);
+ if (IS_ERR(esb_platform_device)) {
+ err = PTR_ERR(esb_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&esb_platform_driver);
+ return err;
+}
+
+static void __exit watchdog_cleanup(void)
+{
+ platform_device_unregister(esb_platform_device);
+ platform_driver_unregister(&esb_platform_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
}
module_init(watchdog_init);