Add entry for displaying whether the device has activated or
deactivated watchdog fw application.
cat <debugfs>/mei_wdt/activation
activated | deactivated
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
---
V3: new in the series
V4: Rebase the code over patchset : "watchdog: Replace driver based refcounting"
drivers/watchdog/mei_wdt.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c
index 85b27fc5d4ec..fe683e582566 100644
--- a/drivers/watchdog/mei_wdt.c
+++ b/drivers/watchdog/mei_wdt.c
@@ -493,6 +493,28 @@ static void mei_wdt_event(struct mei_cl_device *cldev,
#if IS_ENABLED(CONFIG_DEBUG_FS)
+static ssize_t mei_dbgfs_read_activation(struct file *file, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ struct mei_wdt *wdt = file->private_data;
+ const size_t bufsz = 32;
+ char buf[bufsz];
+ ssize_t pos;
+
+ mutex_lock(&wdt->reg_lock);
+ pos = scnprintf(buf, bufsz, "%s\n",
+ __mei_wdt_is_registered(wdt) ? "activated" : "deactivated");
+ mutex_unlock(&wdt->reg_lock);
+
+ return simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+}
+
+static const struct file_operations dbgfs_fops_activation = {
+ .open = simple_open,
+ .read = mei_dbgfs_read_activation,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t mei_dbgfs_read_state(struct file *file, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
@@ -532,6 +554,11 @@ static int dbgfs_register(struct mei_wdt *wdt)
if (!f)
goto err;
+ f = debugfs_create_file("activation", S_IRUSR,
+ dir, wdt, &dbgfs_fops_activation);
+ if (!f)
+ goto err;
+
return 0;
err:
dbgfs_unregister(wdt);
--
2.4.3
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