diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/fujitsu-laptop.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index 5144c353fa14..6ce8e7860013 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -105,6 +105,8 @@ #define LOGOLAMP_POWERON 0x2000 #define LOGOLAMP_ALWAYS 0x4000 #define RADIO_LED_ON 0x20 +#define ECO_LED 0x10000 +#define ECO_LED_ON 0x80000 #endif /* Hotkey details */ @@ -166,6 +168,7 @@ struct fujitsu_hotkey_t { int logolamp_registered; int kblamps_registered; int radio_led_registered; + int eco_led_registered; }; static struct fujitsu_hotkey_t *fujitsu_hotkey; @@ -202,6 +205,17 @@ static struct led_classdev radio_led = { .brightness_get = radio_led_get, .brightness_set = radio_led_set }; + +static enum led_brightness eco_led_get(struct led_classdev *cdev); +static void eco_led_set(struct led_classdev *cdev, + enum led_brightness brightness); + +static struct led_classdev eco_led = { + .name = "fujitsu::eco_led", + .max_brightness = 1, + .brightness_get = eco_led_get, + .brightness_set = eco_led_set +}; #endif #ifdef CONFIG_FUJITSU_LAPTOP_DEBUG @@ -286,6 +300,18 @@ static void radio_led_set(struct led_classdev *cdev, call_fext_func(FUNC_RFKILL, 0x5, RADIO_LED_ON, 0x0); } +static void eco_led_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + int curr; + + curr = call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0); + if (brightness) + call_fext_func(FUNC_LEDS, 0x1, ECO_LED, curr | ECO_LED_ON); + else + call_fext_func(FUNC_LEDS, 0x1, ECO_LED, curr & ~ECO_LED_ON); +} + static enum led_brightness logolamp_get(struct led_classdev *cdev) { enum led_brightness brightness = LED_OFF; @@ -320,6 +346,16 @@ static enum led_brightness radio_led_get(struct led_classdev *cdev) return brightness; } + +static enum led_brightness eco_led_get(struct led_classdev *cdev) +{ + enum led_brightness brightness = LED_OFF; + + if (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON) + brightness = cdev->max_brightness; + + return brightness; +} #endif /* Hardware access for LCD brightness control */ @@ -934,6 +970,23 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device) result); } } + + /* Support for eco led is not always signaled in bit corresponding + * to the bit used to control the led. According to the DSDT table, + * bit 14 seems to indicate presence of said led as well. + * Confirm by testing the status. + */ + if ((call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) && + (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) { + result = led_classdev_register(&fujitsu->pf_device->dev, + &eco_led); + if (result == 0) { + fujitsu_hotkey->eco_led_registered = 1; + } else { + pr_err("Could not register LED handler for eco LED, error %i\n", + result); + } + } #endif return result; @@ -963,6 +1016,9 @@ static int acpi_fujitsu_hotkey_remove(struct acpi_device *device) if (fujitsu_hotkey->radio_led_registered) led_classdev_unregister(&radio_led); + + if (fujitsu_hotkey->eco_led_registered) + led_classdev_unregister(&eco_led); #endif input_unregister_device(input); |