From: Corentin Chary <corentincj@xxxxxxxxxx>
This led can be found on Eeepc 1005 series.
Signed-off-by: Corentin Chary <corentincj@xxxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/platform/x86/Kconfig | 2 +
drivers/platform/x86/eeepc-laptop.c | 67 +++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 55ca39d..e5e4312 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -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.
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 2c65a37..9130434 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -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"
@@ -507,6 +508,39 @@ static struct attribute_group platform_attribute_group = {
};
/*
+ * 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
*/
static struct key_entry *eepc_get_entry_by_scancode(int code)
@@ -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);
--
1.6.0.6
--
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