diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 5a3fb09f10d..38a119bd931 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -3280,13 +3280,49 @@ static int light_set_status(int status) return -ENXIO; } +static void light_set_status_worker(struct work_struct *work) +{ + struct tpacpi_led_classdev *data = + container_of(work, struct tpacpi_led_classdev, work); + + if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) + light_set_status((data->new_brightness != LED_OFF)); +} + +static void light_sysfs_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct tpacpi_led_classdev *data = + container_of(led_cdev, + struct tpacpi_led_classdev, + led_classdev); + data->new_brightness = brightness; + schedule_work(&data->work); +} + +static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) +{ + return (light_get_status() == 1)? LED_FULL : LED_OFF; +} + +static struct tpacpi_led_classdev tpacpi_led_thinklight = { + .led_classdev = { + .name = "tpacpi::thinklight", + .brightness_set = &light_sysfs_set, + .brightness_get = &light_sysfs_get, + } +}; + static int __init light_init(struct ibm_init_struct *iibm) { + int rc = 0; + vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); TPACPI_ACPIHANDLE_INIT(ledb); TPACPI_ACPIHANDLE_INIT(lght); TPACPI_ACPIHANDLE_INIT(cmos); + INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; @@ -3300,7 +3336,25 @@ static int __init light_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "light is %s\n", str_supported(tp_features.light)); - return (tp_features.light)? 0 : 1; + if (tp_features.light) { + rc = led_classdev_register(&tpacpi_pdev->dev, + &tpacpi_led_thinklight.led_classdev); + } + + if (rc < 0) { + tp_features.light = 0; + tp_features.light_status = 0; + } else { + rc = (tp_features.light)? 0 : 1; + } + return rc; +} + +static void light_exit(void) +{ + led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); + if (work_pending(&tpacpi_led_thinklight.work)) + flush_scheduled_work(); } static int light_read(char *p) @@ -3348,6 +3402,7 @@ static struct ibm_struct light_driver_data = { .name = "light", .read = light_read, .write = light_write, + .exit = light_exit, }; /************************************************************************* |