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authorMaxime Bellengé <maxime.bellenge@gmail.com>2017-09-23 18:23:37 +0200
committerDarren Hart (VMware) <dvhart@infradead.org>2017-09-27 00:26:54 -0700
commit4c05984459ec55056857bee32ecb01653c6b8f84 (patch)
treef980d504e01add8996a8d4afc6afd2b3ece3a9fe /drivers/platform
parent821b85366284542e00dd834062144c637e818ee0 (diff)
platform/x86: asus-wmi: Add lightbar led support
Some Asus laptops (ROG series for example) are provided with a lightbar behind the monitor. This patch make possible to switch it on and off. This lightbar works exactly like any other led. Signed-off-by: Maxime Bellengé <maxime.bellenge@gmail.com> [dvhart: fix commit message format and variable declaration order] Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/asus-wmi.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 48e1541dc8d4..a32c5c00e0e7 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -119,6 +119,7 @@ MODULE_LICENSE("GPL");
#define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
#define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
#define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
+#define ASUS_WMI_DEVID_LIGHTBAR 0x00050025
/* Misc */
#define ASUS_WMI_DEVID_CAMERA 0x00060013
@@ -148,6 +149,7 @@ MODULE_LICENSE("GPL");
#define ASUS_WMI_DSTS_BIOS_BIT 0x00040000
#define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
#define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
+#define ASUS_WMI_DSTS_LIGHTBAR_MASK 0x0000000F
#define ASUS_FAN_DESC "cpu_fan"
#define ASUS_FAN_MFUN 0x13
@@ -222,10 +224,13 @@ struct asus_wmi {
int tpd_led_wk;
struct led_classdev kbd_led;
int kbd_led_wk;
+ struct led_classdev lightbar_led;
+ int lightbar_led_wk;
struct workqueue_struct *led_workqueue;
struct work_struct tpd_led_work;
struct work_struct kbd_led_work;
struct work_struct wlan_led_work;
+ struct work_struct lightbar_led_work;
struct asus_rfkill wlan;
struct asus_rfkill bluetooth;
@@ -567,6 +572,48 @@ static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
}
+static void lightbar_led_update(struct work_struct *work)
+{
+ struct asus_wmi *asus;
+ int ctrl_param;
+
+ asus = container_of(work, struct asus_wmi, lightbar_led_work);
+
+ ctrl_param = asus->lightbar_led_wk;
+ asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
+}
+
+static void lightbar_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct asus_wmi *asus;
+
+ asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
+
+ asus->lightbar_led_wk = !!value;
+ queue_work(asus->led_workqueue, &asus->lightbar_led_work);
+}
+
+static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
+{
+ struct asus_wmi *asus;
+ u32 result;
+
+ asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
+ asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
+
+ return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
+}
+
+static int lightbar_led_presence(struct asus_wmi *asus)
+{
+ u32 result;
+
+ asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
+
+ return result & ASUS_WMI_DSTS_PRESENCE_BIT;
+}
+
static void asus_wmi_led_exit(struct asus_wmi *asus)
{
if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
@@ -575,6 +622,8 @@ static void asus_wmi_led_exit(struct asus_wmi *asus)
led_classdev_unregister(&asus->tpd_led);
if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
led_classdev_unregister(&asus->wlan_led);
+ if (!IS_ERR_OR_NULL(asus->lightbar_led.dev))
+ led_classdev_unregister(&asus->lightbar_led);
if (asus->led_workqueue)
destroy_workqueue(asus->led_workqueue);
}
@@ -630,6 +679,20 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
rv = led_classdev_register(&asus->platform_device->dev,
&asus->wlan_led);
+ if (rv)
+ goto error;
+ }
+
+ if (lightbar_led_presence(asus)) {
+ INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);
+
+ asus->lightbar_led.name = "asus::lightbar";
+ asus->lightbar_led.brightness_set = lightbar_led_set;
+ asus->lightbar_led.brightness_get = lightbar_led_get;
+ asus->lightbar_led.max_brightness = 1;
+
+ rv = led_classdev_register(&asus->platform_device->dev,
+ &asus->lightbar_led);
}
error: