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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>
This commit is contained in:
Maxime Bellengé 2017-09-23 18:23:37 +02:00 committed by Darren Hart (VMware)
parent 821b853662
commit 4c05984459
1 changed files with 63 additions and 0 deletions
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63
drivers/platform/x86/asus-wmi.c
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@ -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: