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toshiba_acpi: Add ECO mode led support

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Newer Toshiba laptops now come with a feature called
ECO Mode, where the system is put in low power consupmtion
state and a green (world shaped with leaves) icon illuminates
indicating that the system is in such power state.

This patch adds support to turn on/off the ECO led by
creating and registering the toshiba::eco_mode led.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Azael Avalos 2014-03-25 20:38:33 -06:00 committed by Matthew Garrett
parent 9d8658acd6
commit def6c4e25d
1 changed files with 66 additions and 0 deletions
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66
drivers/platform/x86/toshiba_acpi.c
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@ -112,6 +112,7 @@ MODULE_LICENSE("GPL");
#define HCI_LCD_BRIGHTNESS 0x002a
#define HCI_WIRELESS 0x0056
#define HCI_KBD_ILLUMINATION 0x0095
#define HCI_ECO_MODE 0x0097
#define SCI_ILLUMINATION 0x014e
#define SCI_KBD_ILLUM_STATUS 0x015c
#define SCI_TOUCHPAD 0x050e
@ -142,6 +143,7 @@ struct toshiba_acpi_dev {
struct backlight_device *backlight_dev;
struct led_classdev led_dev;
struct led_classdev kbd_led;
struct led_classdev eco_led;
int force_fan;
int last_key_event;
@ -159,6 +161,7 @@ struct toshiba_acpi_dev {
unsigned int kbd_illum_supported:1;
unsigned int kbd_led_registered:1;
unsigned int touchpad_supported:1;
unsigned int eco_supported:1;
unsigned int sysfs_created:1;
struct mutex mutex;
@ -571,6 +574,57 @@ static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
return 0;
}
/* Eco Mode support */
static int toshiba_eco_mode_available(struct toshiba_acpi_dev *dev)
{
acpi_status status;
u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
u32 out[HCI_WORDS];
status = hci_raw(dev, in, out);
if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
pr_info("ACPI call to get ECO led failed\n");
return 0;
}
return 1;
}
static enum led_brightness toshiba_eco_mode_get_status(struct led_classdev *cdev)
{
struct toshiba_acpi_dev *dev = container_of(cdev,
struct toshiba_acpi_dev, eco_led);
u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status;
status = hci_raw(dev, in, out);
if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
pr_err("ACPI call to get ECO led failed\n");
return LED_OFF;
}
return out[2] ? LED_FULL : LED_OFF;
}
static void toshiba_eco_mode_set_status(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct toshiba_acpi_dev *dev = container_of(cdev,
struct toshiba_acpi_dev, eco_led);
u32 in[HCI_WORDS] = { HCI_SET, HCI_ECO_MODE, 0, 1, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status;
/* Switch the Eco Mode led on/off */
in[2] = (brightness) ? 1 : 0;
status = hci_raw(dev, in, out);
if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
pr_err("ACPI call to set ECO led failed\n");
return;
}
}
/* Bluetooth rfkill handlers */
static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
@ -1469,6 +1523,9 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
if (dev->kbd_led_registered)
led_classdev_unregister(&dev->kbd_led);
if (dev->eco_supported)
led_classdev_unregister(&dev->eco_led);
if (toshiba_acpi)
toshiba_acpi = NULL;
@ -1556,6 +1613,15 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
dev->illumination_supported = 1;
}
if (toshiba_eco_mode_available(dev)) {
dev->eco_led.name = "toshiba::eco_mode";
dev->eco_led.max_brightness = 1;
dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
if (!led_classdev_register(&dev->acpi_dev->dev, &dev->eco_led))
dev->eco_supported = 1;
}
ret = toshiba_kbd_illum_status_get(dev, &dummy);
if (!ret) {
dev->kbd_time = dummy >> HCI_MISC_SHIFT;