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path: root/drivers/hwmon/hp_accel.c
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Diffstat (limited to 'drivers/hwmon/hp_accel.c')
-rw-r--r--drivers/hwmon/hp_accel.c43
1 files changed, 41 insertions, 2 deletions
diff --git a/drivers/hwmon/hp_accel.c b/drivers/hwmon/hp_accel.c
index bf8d4058057..86a0f51d99d 100644
--- a/drivers/hwmon/hp_accel.c
+++ b/drivers/hwmon/hp_accel.c
@@ -36,6 +36,7 @@
#include <linux/freezer.h>
#include <linux/version.h>
#include <linux/uaccess.h>
+#include <linux/leds.h>
#include <acpi/acpi_drivers.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"
@@ -154,10 +155,34 @@ static struct dmi_system_id lis3lv02d_dmi_ids[] = {
*/
};
+static acpi_status hpled_acpi_write(acpi_handle handle, int reg)
+{
+ unsigned long long ret; /* Not used when writing */
+ union acpi_object in_obj[1];
+ struct acpi_object_list args = { 1, in_obj };
+
+ in_obj[0].type = ACPI_TYPE_INTEGER;
+ in_obj[0].integer.value = reg;
+
+ return acpi_evaluate_integer(handle, "ALED", &args, &ret);
+}
+
+static void hpled_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ hpled_acpi_write(adev.device->handle, !!value);
+}
+
+static struct led_classdev hpled_led = {
+ .name = "hp:red:hddprotection",
+ .default_trigger = "none",
+ .brightness_set = hpled_set,
+};
static int lis3lv02d_add(struct acpi_device *device)
{
u8 val;
+ int ret;
if (!device)
return -EINVAL;
@@ -183,7 +208,17 @@ static int lis3lv02d_add(struct acpi_device *device)
adev.ac = lis3lv02d_axis_normal;
}
- return lis3lv02d_init_device(&adev);
+ ret = led_classdev_register(NULL, &hpled_led);
+ if (ret)
+ return ret;
+
+ ret = lis3lv02d_init_device(&adev);
+ if (ret) {
+ led_classdev_unregister(&hpled_led);
+ return ret;
+ }
+
+ return ret;
}
static int lis3lv02d_remove(struct acpi_device *device, int type)
@@ -194,6 +229,8 @@ static int lis3lv02d_remove(struct acpi_device *device, int type)
lis3lv02d_joystick_disable();
lis3lv02d_poweroff(device->handle);
+ led_classdev_unregister(&hpled_led);
+
return lis3lv02d_remove_fs();
}
@@ -203,6 +240,7 @@ static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
{
/* make sure the device is off when we suspend */
lis3lv02d_poweroff(device->handle);
+ led_classdev_suspend(&hpled_led);
return 0;
}
@@ -215,6 +253,7 @@ static int lis3lv02d_resume(struct acpi_device *device)
else
lis3lv02d_poweroff(device->handle);
mutex_unlock(&adev.lock);
+ led_classdev_resume(&hpled_led);
return 0;
}
#else
@@ -256,7 +295,7 @@ static void __exit lis3lv02d_exit_module(void)
acpi_bus_unregister_driver(&lis3lv02d_driver);
}
-MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
+MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
MODULE_LICENSE("GPL");