16 #include <linux/backlight.h>
85 static struct backlight_device *backlight;  variable
137 	/* Instance 1 is "get backlight", cmp with DSDT */  in bl_get()
140 		pr_err("Could not query backlight: %d\n", err);  in bl_get()
146 			pr_debug("Current backlight level: 0x%X - index: %d\n",  in bl_get()
164 	/* Instance 0 is "set backlight" */  in bl_set_status()
203 		(backlight ||  in msi_wmi_notify()
223 	backlight = backlight_device_register(DRV_NAME, NULL, NULL,  in msi_wmi_backlight_setup()
226 	if (IS_ERR(backlight))  in msi_wmi_backlight_setup()
227 		return PTR_ERR(backlight);  in msi_wmi_backlight_setup()
231 		backlight_device_unregister(backlight);  in msi_wmi_backlight_setup()
235 	backlight->props.brightness = err;  in msi_wmi_backlight_setup()
301 			pr_err("Unable to setup backlight device\n");  in msi_wmi_init()
304 		pr_debug("Backlight device created\n");  in msi_wmi_init()
307 	if (!event_wmi && !backlight) {  in msi_wmi_init()
308 		pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");  in msi_wmi_init()
329 	backlight_device_unregister(backlight);  in msi_wmi_exit()