[PATCH v2 3/6] watchdog: register watchdog virtual device with short name wdog

[Oleksij Rempel <o.rempel@pengutronix.de>]

the watchdog hwdev is usually named with devicetree schema
which is not practical for CLI.

On device registration "wdog" will be extended with some index number
extracted from devicetree (if awailable) or automatically assigned
first available number. End result will be "wdog0" .. etc.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/watchdog/wd_core.c | 24 ++++++++++++++++++++++++
 include/watchdog.h         |  1 +
 2 files changed, 25 insertions(+)

diff --git a/drivers/watchdog/wd_core.c b/drivers/watchdog/wd_core.c
index 1d0f0de7d..0dc7aecf3 100644
--- a/drivers/watchdog/wd_core.c
+++ b/drivers/watchdog/wd_core.c
@@ -31,8 +31,31 @@ static const char *watchdog_name(struct watchdog *wd)
 	return "unknown";
 }
 
+static int watchdog_register_dev(struct watchdog *wd, const char *name, int id)
+{
+	wd->dev.parent = wd->hwdev;
+	wd->dev.id = id;
+	strncpy(wd->dev.name, name, MAX_DRIVER_NAME);
+
+	return register_device(&wd->dev);
+}
+
 int watchdog_register(struct watchdog *wd)
 {
+	struct param_d *p;
+	const char *alias;
+	int ret;
+
+	alias = of_alias_get(wd->hwdev->device_node);
+	if (alias)
+		ret = watchdog_register_dev(wd, alias, DEVICE_ID_SINGLE);
+
+	if (!alias || ret)
+		ret = watchdog_register_dev(wd, "wdog", DEVICE_ID_DYNAMIC);
+
+	if (ret)
+		return ret;
+
 	if (!wd->priority)
 		wd->priority = WATCHDOG_DEFAULT_PRIORITY;
 
@@ -50,6 +73,7 @@ EXPORT_SYMBOL(watchdog_register);
 
 int watchdog_deregister(struct watchdog *wd)
 {
+	unregister_device(&wd->dev);
 	list_del(&wd->list);
 
 	return 0;
diff --git a/include/watchdog.h b/include/watchdog.h
index 1e06fbc3f..a2459d255 100644
--- a/include/watchdog.h
+++ b/include/watchdog.h
@@ -17,6 +17,7 @@ struct watchdog {
 	int (*set_timeout)(struct watchdog *, unsigned);
 	const char *name;
 	struct device_d *hwdev;
+	struct device_d dev;
 	unsigned int priority;
 	unsigned int timeout_max;
 	struct list_head list;
-- 
2.16.1


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