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Commit def6c4e2 authored by Azael Avalos's avatar Azael Avalos Committed by Matthew Garrett
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toshiba_acpi: Add ECO mode led support 



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: default avatarAzael Avalos <coproscefalo@gmail.com>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent 9d8658ac

drivers/platform/x86/toshiba_acpi.c

+66 −0
Original line number Diff line number Diff line
@@ -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)
@@ -1470,6 +1524,9 @@ 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;