diff options
author | Tomas Winkler <tomas.winkler@intel.com> | 2014-11-19 18:01:39 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-27 06:06:41 +0300 |
commit | 55c4e6405d434e2db1e3fb3618b84741bb17d862 (patch) | |
tree | eafdf15abd86aee834889e3d8dff7ad2473163f0 /drivers | |
parent | edca5ea3ff3323b4526d70642d115992df73c9bc (diff) | |
download | linux-55c4e6405d434e2db1e3fb3618b84741bb17d862.tar.xz |
mei: export fw status registers through sysfs
The interface is for applications that monitor
the fw health.
We use device_create_with_groups interface
to register attribute with the mei class device
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/misc/mei/main.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index beedc91f03a6..ae56ba6ca0e3 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -631,6 +631,44 @@ out: return mask; } +/** + * fw_status_show - mei device attribute show method + * + * @device: device pointer + * @attr: attribute pointer + * @buf: char out buffer + * + * Return: number of the bytes printed into buf or error + */ +static ssize_t fw_status_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mei_device *dev = dev_get_drvdata(device); + struct mei_fw_status fw_status; + int err, i; + ssize_t cnt = 0; + + mutex_lock(&dev->device_lock); + err = mei_fw_status(dev, &fw_status); + mutex_unlock(&dev->device_lock); + if (err) { + dev_err(device, "read fw_status error = %d\n", err); + return err; + } + + for (i = 0; i < fw_status.count; i++) + cnt += scnprintf(buf + cnt, PAGE_SIZE - cnt, "%08X\n", + fw_status.status[i]); + return cnt; +} +static DEVICE_ATTR_RO(fw_status); + +static struct attribute *mei_attrs[] = { + &dev_attr_fw_status.attr, + NULL +}; +ATTRIBUTE_GROUPS(mei); + /* * file operations structure will be used for mei char device. */ @@ -710,8 +748,9 @@ int mei_register(struct mei_device *dev, struct device *parent) goto err_dev_add; } - clsdev = device_create(mei_class, parent, devno, - NULL, "mei%d", dev->minor); + clsdev = device_create_with_groups(mei_class, parent, devno, + dev, mei_groups, + "mei%d", dev->minor); if (IS_ERR(clsdev)) { dev_err(parent, "unable to create device %d:%d\n", |