[PATCH v2 5/6] watchdog: provide timeout_cur value

[Oleksij Rempel]

timeout_cur will be used for watchdog poller.
Provided values should be good enough for most users
and still can be changed for separate projects and
fit to needed requirements.

Signed-off-by: Oleksij Rempel <o.rem...@pengutronix.de>
---
 drivers/watchdog/wd_core.c | 18 ++++++++++++++++++
 include/watchdog.h         |  1 +
 2 files changed, 19 insertions(+)

diff --git a/drivers/watchdog/wd_core.c b/drivers/watchdog/wd_core.c
index 31a88a377..69663b39c 100644
--- a/drivers/watchdog/wd_core.c
+++ b/drivers/watchdog/wd_core.c
@@ -31,6 +31,16 @@ static const char *watchdog_name(struct watchdog *wd)
        return "unknown";
 }
 
+static int watchdog_set_cur(struct param_d *param, void *priv)
+{
+       struct watchdog *wd = priv;
+
+       if (wd->timeout_cur > wd->timeout_max)
+               return -EINVAL;
+
+       return 0;
+}
+
 static int watchdog_register_dev(struct watchdog *wd, const char *name, int id)
 {
        wd->dev.parent = wd->hwdev;
@@ -63,11 +73,19 @@ int watchdog_register(struct watchdog *wd)
        if (!wd->timeout_max)
                wd->timeout_max = 60 * 60 * 24;
 
+       if (!wd->timeout_cur || wd->timeout_cur > wd->timeout_max)
+               wd->timeout_cur = wd->timeout_max;
+
        p = dev_add_param_uint32_ro(&wd->dev, "timeout_max",
                        &wd->timeout_max, "%u");
        if (IS_ERR(p))
                return PTR_ERR(p);
 
+       p = dev_add_param_uint32(&wd->dev, "timeout_cur", watchdog_set_cur, 
NULL,
+                       &wd->timeout_cur, "%u", wd);
+       if (IS_ERR(p))
+               return PTR_ERR(p);
+
        list_add_tail(&wd->list, &watchdog_list);
 
        pr_debug("registering watchdog %s with priority %d\n", 
watchdog_name(wd),
diff --git a/include/watchdog.h b/include/watchdog.h
index a2459d255..2f1874c19 100644
--- a/include/watchdog.h
+++ b/include/watchdog.h
@@ -20,6 +20,7 @@ struct watchdog {
        struct device_d dev;
        unsigned int priority;
        unsigned int timeout_max;
+       unsigned int timeout_cur;
        struct list_head list;
 };
 
-- 
2.16.1


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