eeepc-laptop: add a getter for touchpad led

Allow te get the current led state in a more accurate way.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index b2edfdcdcb84..e9fc530e7dc2 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -529,6 +529,15 @@ static void tpd_led_set(struct led_classdev *led_cdev,
         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 }
 
+static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
+{
+        struct eeepc_laptop *eeepc;
+
+        eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
+
+        return get_acpi(eeepc, CM_ASL_TPD);
+}
+
 static int eeepc_led_init(struct eeepc_laptop *eeepc)
 {
         int rv;
@@ -543,6 +552,8 @@ static int eeepc_led_init(struct eeepc_laptop *eeepc)
 
         eeepc->tpd_led.name = "eeepc::touchpad";
         eeepc->tpd_led.brightness_set = tpd_led_set;
+        if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
+          eeepc->tpd_led.brightness_get = tpd_led_get;
         eeepc->tpd_led.max_brightness = 1;
 
         rv = led_classdev_register(&eeepc->platform_device->dev,