On 5/10/21 6:16 AM, Juerg Haefliger wrote:
The valid range for the 'timeout' value is useful information so expose
the min and max timeout values via sysfs.
Signed-off-by: Juerg Haefliger <juergh@xxxxxxxxxxxxx>
---
drivers/watchdog/watchdog_dev.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 2946f3a63110..b84d53a79618 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -525,6 +525,24 @@ static ssize_t timeout_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(timeout);
+static ssize_t min_timeout_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct watchdog_device *wdd = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", wdd->min_timeout);
+}
+static DEVICE_ATTR_RO(min_timeout);
+
+static ssize_t max_timeout_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct watchdog_device *wdd = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", wdd->max_timeout);
Makes sense, but please use sysfs_emit().
Guenter
+}
+static DEVICE_ATTR_RO(max_timeout);
+
static ssize_t pretimeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -609,6 +627,8 @@ static struct attribute *wdt_attrs[] = {
&dev_attr_state.attr,
&dev_attr_identity.attr,
&dev_attr_timeout.attr,
+ &dev_attr_min_timeout.attr,
+ &dev_attr_max_timeout.attr,
&dev_attr_pretimeout.attr,
&dev_attr_timeleft.attr,
&dev_attr_bootstatus.attr,
