Export fw status register through sysfs interface. The interface is for applications that monitors fw health.
Signed-off-by: Natalia Ovsyanikov <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> --- drivers/misc/mei/main.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 51 insertions(+), 3 deletions(-) diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 173ff09..64e36a8 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -659,6 +659,44 @@ out: return mask; } +/** + * mei_show_fw_status - mei device attribute show method + * + * @dev: device pointer + * @attr: attribute pointer + * @buf: char out buffer + * + * returns number of the bytes, printed into the buffer + */ + +static ssize_t mei_show_fw_status(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mei_device *dev = dev_get_drvdata(device); + u32 fw_status; + int err; + + mutex_lock(&dev->device_lock); + err = mei_fw_status(dev, &fw_status); + mutex_unlock(&dev->device_lock); + if (err) { + dev_err(device, "attribute show: read fw_status error = %d\n", + err); + return err; + } + + dev_dbg(device, "attribute show: fw_status 0x%x\n", fw_status); + return sprintf(buf, "%08X\n", fw_status); +} +static DEVICE_ATTR(fw_status, S_IRUGO, mei_show_fw_status, NULL); +static struct attribute *mei_attributes[] = { + &dev_attr_fw_status.attr, + NULL +}; +static const struct attribute_group mei_attr_group = { + .attrs = mei_attributes, +}; + /* * file operations structure will be used for mei char device. */ @@ -685,17 +723,22 @@ static struct miscdevice mei_misc_device = { .minor = MISC_DYNAMIC_MINOR, }; - int mei_register(struct mei_device *dev) { + struct device *device = &dev->pdev->dev; int ret; - mei_misc_device.parent = &dev->pdev->dev; + + mei_misc_device.parent = device; ret = misc_register(&mei_misc_device); if (ret) return ret; + ret = sysfs_create_group(&device->kobj, &mei_attr_group); + if (ret) + return ret; + if (mei_dbgfs_register(dev, mei_misc_device.name)) - dev_err(&dev->pdev->dev, "cannot register debugfs\n"); + dev_err(device, "cannot register debugfs\n"); return 0; } @@ -703,7 +746,12 @@ EXPORT_SYMBOL_GPL(mei_register); void mei_deregister(struct mei_device *dev) { + struct device *device = &dev->pdev->dev; + + sysfs_remove_group(&device->kobj, &mei_attr_group); + mei_dbgfs_deregister(dev); + misc_deregister(&mei_misc_device); mei_misc_device.parent = NULL; } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
