This synchronizes the information reported by ioctl and sysfs.
The mismatch is confusing because "wdctl" from util-linux uses the ioctl
when used with root privileges and sysfs without.
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-class-watchdog | 6 ++++++
drivers/watchdog/watchdog_dev.c | 10 ++++++++++
2 files changed, 16 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-watchdog b/Documentation/ABI/testing/sysfs-class-watchdog
index 27c000238fe4..94fb74615951 100644
--- a/Documentation/ABI/testing/sysfs-class-watchdog
+++ b/Documentation/ABI/testing/sysfs-class-watchdog
@@ -6,6 +6,12 @@ Description:
device at boot. It is equivalent to WDIOC_GETBOOTSTATUS of
ioctl interface.
+What: /sys/class/watchdog/watchdogn/options
+Date: April 2023
+Contact: Thomas Weißschuh
+Description:
+ It is a read only file. It contains options of watchdog device.
+
What: /sys/class/watchdog/watchdogn/fw_version
Date: April 2023
Contact: Thomas Weißschuh
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 7feeda02a531..2b06c179f754 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -546,6 +546,15 @@ static ssize_t pretimeout_show(struct device *dev,
}
static DEVICE_ATTR_RO(pretimeout);
+static ssize_t options_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct watchdog_device *wdd = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "0x%x\n", wdd->info->options);
+}
+static DEVICE_ATTR_RO(options);
+
static ssize_t fw_version_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -626,6 +635,7 @@ static umode_t wdt_is_visible(struct kobject *kobj, struct attribute *attr,
}
static struct attribute *wdt_attrs[] = {
&dev_attr_state.attr,
+ &dev_attr_options.attr,
&dev_attr_fw_version.attr,
&dev_attr_identity.attr,
&dev_attr_timeout.attr,
--
2.39.0
