diff options
| -rw-r--r-- | drivers/hwmon/applesmc.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c index 753b34885f9d..7ea6a8f66056 100644 --- a/drivers/hwmon/applesmc.c +++ b/drivers/hwmon/applesmc.c @@ -178,6 +178,8 @@ static const int debug; static struct platform_device *pdev; static s16 rest_x; static s16 rest_y; +static u8 backlight_state[2]; + static struct device *hwmon_dev; static struct input_polled_dev *applesmc_idev; @@ -497,17 +499,36 @@ static int applesmc_probe(struct platform_device *dev) return 0; } -static int applesmc_resume(struct platform_device *dev) +/* Synchronize device with memorized backlight state */ +static int applesmc_pm_resume(struct device *dev) { - return applesmc_device_init(); + mutex_lock(&applesmc_lock); + if (applesmc_light) + applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); + mutex_unlock(&applesmc_lock); + return 0; } +/* Reinitialize device on resume from hibernation */ +static int applesmc_pm_restore(struct device *dev) +{ + int ret = applesmc_device_init(); + if (ret) + return ret; + return applesmc_pm_resume(dev); +} + +static struct dev_pm_ops applesmc_pm_ops = { + .resume = applesmc_pm_resume, + .restore = applesmc_pm_restore, +}; + static struct platform_driver applesmc_driver = { .probe = applesmc_probe, - .resume = applesmc_resume, .driver = { .name = "applesmc", .owner = THIS_MODULE, + .pm = &applesmc_pm_ops, }, }; @@ -804,17 +825,10 @@ static ssize_t applesmc_calibrate_store(struct device *dev, return count; } -/* Store the next backlight value to be written by the work */ -static unsigned int backlight_value; - static void applesmc_backlight_set(struct work_struct *work) { - u8 buffer[2]; - mutex_lock(&applesmc_lock); - buffer[0] = backlight_value; - buffer[1] = 0x00; - applesmc_write_key(BACKLIGHT_KEY, buffer, 2); + applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); mutex_unlock(&applesmc_lock); } static DECLARE_WORK(backlight_work, &applesmc_backlight_set); @@ -824,7 +838,7 @@ static void applesmc_brightness_set(struct led_classdev *led_cdev, { int ret; - backlight_value = value; + backlight_state[0] = value; ret = queue_work(applesmc_led_wq, &backlight_work); if (debug && (!ret)) |