diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/dock.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 54a697f9aa18..4546bf873aea 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -29,6 +29,7 @@ #include <linux/notifier.h> #include <linux/platform_device.h> #include <linux/jiffies.h> +#include <linux/stddef.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> @@ -667,6 +668,23 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr, } DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); +/* + * show_dock_uid - read method for "uid" file in sysfs + */ +static ssize_t show_dock_uid(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned long lbuf; + acpi_status status = acpi_evaluate_integer(dock_station->handle, "_UID", NULL, &lbuf); + if(ACPI_FAILURE(status)) { + return 0; + } + return snprintf(buf, PAGE_SIZE, "%lx\n", lbuf); +} +DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); + + + /** * dock_add - add a new dock station * @handle: the dock station handle @@ -715,6 +733,13 @@ static int dock_add(acpi_handle handle) kfree(dock_station); return ret; } + ret = device_create_file(&dock_device.dev, &dev_attr_uid); + if (ret) { + printk("Error %d adding sysfs file\n", ret); + platform_device_unregister(&dock_device); + kfree(dock_station); + return ret; + } /* Find dependent devices */ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |