diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2016-02-07 22:46:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 13:00:52 -0800 |
| commit | ad1cd720b18330599a9cabaf970095b74c9c3355 (patch) | |
| tree | 89cf88032f8b2808c48fecc8a8f413f7eb778859 /drivers/watchdog | |
| parent | 7a23f80eaae9c6b5175cd7a96634a91ed9928aff (diff) | |
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>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/mei_wdt.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c index 9addf8902f74..b93474ec34a1 100644 --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -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); |