redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

watchdog: mei_wdt: add activation debugfs entry 

Add entry for displaying whether the device has activated or
deactivated watchdog fw application.

cat <debugfs>/mei_wdt/activation
activated | deactivated

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Tomas Winkler 2016-02-07 22:46:49 +02:00 committed by Greg Kroah-Hartman
parent 7a23f80eaa
commit ad1cd720b1
1 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/watchdog/mei_wdt.c
View File

@ -497,6 +497,28 @@ 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[32];
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)
{
@ -536,6 +558,11 @@ 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);