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authorAlan Cox <alan@linux.intel.com>2012-05-11 14:00:20 +0400
committerWim Van Sebroeck <wim@iguana.be>2012-05-30 09:54:46 +0400
commitd6b469d915ae348b3bb8b25034063d6870ff4a00 (patch)
tree7bc00fa1870ba2fb1a7943c1a1d9e524752cb299 /drivers/watchdog/watchdog_core.c
parent2bbeed016dd96045ec82c3a309afddcc3a0db1d2 (diff)
downloadlinux-d6b469d915ae348b3bb8b25034063d6870ff4a00.tar.xz
watchdog: create all the proper device files
Create the watchdog class and it's associated devices. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/watchdog_core.c')
-rw-r--r--drivers/watchdog/watchdog_core.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index 5f9879369003..86a57673abf9 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -35,10 +35,12 @@
#include <linux/watchdog.h> /* For watchdog specific items */
#include <linux/init.h> /* For __init/__exit/... */
#include <linux/idr.h> /* For ida_* macros */
+#include <linux/err.h> /* For IS_ERR macros */
#include "watchdog_core.h" /* For watchdog_dev_register/... */
static DEFINE_IDA(watchdog_ida);
+static struct class *watchdog_class;
/**
* watchdog_register_device() - register a watchdog device
@@ -52,7 +54,7 @@ static DEFINE_IDA(watchdog_ida);
*/
int watchdog_register_device(struct watchdog_device *wdd)
{
- int ret, id;
+ int ret, id, devno;
if (wdd == NULL || wdd->info == NULL || wdd->ops == NULL)
return -EINVAL;
@@ -101,6 +103,16 @@ int watchdog_register_device(struct watchdog_device *wdd)
}
}
+ devno = wdd->cdev.dev;
+ wdd->dev = device_create(watchdog_class, wdd->parent, devno,
+ NULL, "watchdog%d", wdd->id);
+ if (IS_ERR(wdd->dev)) {
+ watchdog_dev_unregister(wdd);
+ ida_simple_remove(&watchdog_ida, id);
+ ret = PTR_ERR(wdd->dev);
+ return ret;
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(watchdog_register_device);
@@ -115,6 +127,7 @@ EXPORT_SYMBOL_GPL(watchdog_register_device);
void watchdog_unregister_device(struct watchdog_device *wdd)
{
int ret;
+ int devno = wdd->cdev.dev;
if (wdd == NULL)
return;
@@ -122,18 +135,35 @@ void watchdog_unregister_device(struct watchdog_device *wdd)
ret = watchdog_dev_unregister(wdd);
if (ret)
pr_err("error unregistering /dev/watchdog (err=%d)\n", ret);
+ device_destroy(watchdog_class, devno);
ida_simple_remove(&watchdog_ida, wdd->id);
+ wdd->dev = NULL;
}
EXPORT_SYMBOL_GPL(watchdog_unregister_device);
static int __init watchdog_init(void)
{
- return watchdog_dev_init();
+ int err;
+
+ watchdog_class = class_create(THIS_MODULE, "watchdog");
+ if (IS_ERR(watchdog_class)) {
+ pr_err("couldn't create class\n");
+ return PTR_ERR(watchdog_class);
+ }
+
+ err = watchdog_dev_init();
+ if (err < 0) {
+ class_destroy(watchdog_class);
+ return err;
+ }
+
+ return 0;
}
static void __exit watchdog_exit(void)
{
watchdog_dev_exit();
+ class_destroy(watchdog_class);
ida_destroy(&watchdog_ida);
}