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eeepc-laptop: add touchpad led

Browse source 
This led can be found on Eeepc 1005 series.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Corentin Chary 2009-12-03 07:44:52 +00:00 committed by Len Brown
parent edf6245227
commit 3c0eb51069
2 changed files with 69 additions and 0 deletions
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2
drivers/platform/x86/Kconfig
View file

@ -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.

67
drivers/platform/x86/eeepc-laptop.c
View file

@ -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);