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| author | Hans de Goede <hdegoede@redhat.com> | 2017-03-16 11:55:35 +0100 |
|---|---|---|
| committer | Darren Hart (VMware) <dvhart@infradead.org> | 2017-04-13 10:12:46 -0700 |
| commit | 9c656b07997f518ab407dd990aaf55f358337bd6 (patch) | |
| tree | 2c18c163605848b7e5c040f593e3869eca4ff610 /drivers/platform/x86/dell-laptop.c | |
| parent | e5bf5df7858e2339d277427129139995628c49a7 (diff) | |
| download | linux-9c656b07997f518ab407dd990aaf55f358337bd6.tar.gz linux-9c656b07997f518ab407dd990aaf55f358337bd6.tar.bz2 linux-9c656b07997f518ab407dd990aaf55f358337bd6.zip | |
platform/x86: dell-*: Call new led hw_changed API on kbd brightness change
Make dell-wmi notify on hotkey kbd brightness changes, listen for this
in dell-laptop and call led_classdev_notify_brightness_hw_changed.
This will allow userspace to monitor (poll) for brightness changes on
these LEDs caused by the hotkey.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Diffstat (limited to 'drivers/platform/x86/dell-laptop.c')
| -rw-r--r-- | drivers/platform/x86/dell-laptop.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index da185fb2a621..1cd258b790e8 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -1984,6 +1984,7 @@ out: static struct led_classdev kbd_led = { .name = "dell::kbd_backlight", + .flags = LED_BRIGHT_HW_CHANGED, .brightness_set_blocking = kbd_led_level_set, .brightness_get = kbd_led_level_get, .groups = kbd_led_groups, @@ -1991,6 +1992,8 @@ static struct led_classdev kbd_led = { static int __init kbd_led_init(struct device *dev) { + int ret; + kbd_init(); if (!kbd_led_present) return -ENODEV; @@ -2002,7 +2005,11 @@ static int __init kbd_led_init(struct device *dev) if (kbd_led.max_brightness) kbd_led.max_brightness--; } - return led_classdev_register(dev, &kbd_led); + ret = led_classdev_register(dev, &kbd_led); + if (ret) + kbd_led_present = false; + + return ret; } static void brightness_set_exit(struct led_classdev *led_cdev, @@ -2019,6 +2026,26 @@ static void kbd_led_exit(void) led_classdev_unregister(&kbd_led); } +static int dell_laptop_notifier_call(struct notifier_block *nb, + unsigned long action, void *data) +{ + switch (action) { + case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED: + if (!kbd_led_present) + break; + + led_classdev_notify_brightness_hw_changed(&kbd_led, + kbd_led_level_get(&kbd_led)); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block dell_laptop_notifier = { + .notifier_call = dell_laptop_notifier_call, +}; + static int __init dell_init(void) { struct calling_interface_buffer *buffer; @@ -2062,6 +2089,8 @@ static int __init dell_init(void) debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, &dell_debugfs_fops); + dell_laptop_register_notifier(&dell_laptop_notifier); + if (acpi_video_get_backlight_type() != acpi_backlight_vendor) return 0; @@ -2113,6 +2142,7 @@ fail_platform_driver: static void __exit dell_exit(void) { + dell_laptop_unregister_notifier(&dell_laptop_notifier); debugfs_remove_recursive(dell_laptop_dir); if (quirks && quirks->touchpad_led) touchpad_led_exit(); |