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Commit 3c0eb510 authored by Corentin Chary's avatar Corentin Chary Committed by Len Brown
Browse files

eeepc-laptop: add touchpad led 



This led can be found on Eeepc 1005 series.

Signed-off-by: default avatarCorentin Chary <corentincj@iksaif.net>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent edf62452

drivers/platform/x86/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -334,6 +334,8 @@ config EEEPC_LAPTOP 
	depends on HOTPLUG_PCI

	select BACKLIGHT_CLASS_DEVICE

	select HWMON

	select LEDS_CLASS

	select NEW_LEDS

	---help---

	  This driver supports the Fn-Fx keys on Eee PC laptops.

drivers/platform/x86/eeepc-laptop.c

+67 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/rfkill.h>

#include <linux/pci.h>

#include <linux/pci_hotplug.h>

#include <linux/leds.h>



#define EEEPC_LAPTOP_VERSION	"0.1"
@@ -506,6 +507,39 @@ static struct attribute_group platform_attribute_group = { 
	.attrs = platform_attributes

};



/*

 * LEDs

 */

/*

 * These functions actually update the LED's, and are called from a

 * workqueue. By doing this as separate work rather than when the LED

 * subsystem asks, we avoid messing with the Asus ACPI stuff during a

 * potentially bad time, such as a timer interrupt.

 */

static int tpd_led_wk;



static void tpd_led_update(struct work_struct *ignored)

{

	int value = tpd_led_wk;

	set_acpi(CM_ASL_TPD, value);

}



static struct workqueue_struct *led_workqueue;

static DECLARE_WORK(tpd_led_work, tpd_led_update);



static void tpd_led_set(struct led_classdev *led_cdev,

			enum led_brightness value)

{

	tpd_led_wk = (value > 0) ? 1 : 0;

	queue_work(led_workqueue, &tpd_led_work);

}



static struct led_classdev tpd_led = {

	.name           = "eeepc::touchpad",

	.brightness_set = tpd_led_set,

	.max_brightness = 1

};



/*

 * Hotkey functions

 */
@@ -1034,6 +1068,14 @@ static void eeepc_hwmon_exit(void) 
	eeepc_hwmon_device = NULL;

}



static void eeepc_led_exit(void)

{

	if (led_workqueue)

		destroy_workqueue(led_workqueue);

	if (tpd_led.dev)

		led_classdev_unregister(&tpd_led);

}



static int eeepc_new_rfkill(struct rfkill **rfkill,

			    const char *name, struct device *dev,

			    enum rfkill_type type, int cm)
@@ -1190,6 +1232,24 @@ static int eeepc_input_init(struct device *dev) 
	return 0;

}



static int eeepc_led_init(struct device *dev)

{

	int rv;



	if (get_acpi(CM_ASL_TPD) == -ENODEV)

		return 0;



	rv = led_classdev_register(dev, &tpd_led);

	if (rv)

		return rv;



	led_workqueue = create_singlethread_workqueue("led_workqueue");

	if (!led_workqueue)

		return -ENOMEM;



	return 0;

}



static int __devinit eeepc_hotk_add(struct acpi_device *device)

{

	struct device *dev;
@@ -1248,6 +1308,10 @@ static int __devinit eeepc_hotk_add(struct acpi_device *device) 
	if (result)

		goto fail_hwmon;



	result = eeepc_led_init(dev);

	if (result)

		goto fail_led;



	result = eeepc_rfkill_init(dev);

	if (result)

		goto fail_rfkill;
@@ -1255,6 +1319,8 @@ static int __devinit eeepc_hotk_add(struct acpi_device *device) 
	return 0;



fail_rfkill:

	eeepc_led_exit();

fail_led:

	eeepc_hwmon_exit();

fail_hwmon:

	eeepc_input_exit();
@@ -1284,6 +1350,7 @@ static int eeepc_hotk_remove(struct acpi_device *device, int type) 
	eeepc_rfkill_exit();

	eeepc_input_exit();

	eeepc_hwmon_exit();

	eeepc_led_exit();

	sysfs_remove_group(&platform_device->dev.kobj,

			   &platform_attribute_group);

	platform_device_unregister(platform_device);