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HID: lg-g15: Add support for the G510's M1-M3 and MR LEDs 

Add support for controlling the LEDs below the M1-M3 and MR keys
on the G510.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Hans de Goede 2019-08-28 14:41:30 +02:00 committed by Jiri Kosina
parent 1f8cde2a53
commit 4682bb8e05
1 changed files with 90 additions and 3 deletions
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93
drivers/hid/hid-lg-g15.c
View File

@ -353,6 +353,90 @@ static void lg_g510_leds_sync_work(struct work_struct *work)
mutex_unlock(&g15->mutex);
}
static int lg_g510_update_mkey_led_brightness(struct lg_g15_data *g15)
{
int ret;
ret = hid_hw_raw_request(g15->hdev, LG_G510_FEATURE_M_KEYS_LEDS,
g15->transfer_buf, 2,
HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
if (ret != 2) {
hid_err(g15->hdev, "Error getting LED brightness: %d\n", ret);
ret = (ret < 0) ? ret : -EIO;
}
g15->leds[LG_G15_MACRO_PRESET1].brightness =
!!(g15->transfer_buf[1] & 0x80);
g15->leds[LG_G15_MACRO_PRESET2].brightness =
!!(g15->transfer_buf[1] & 0x40);
g15->leds[LG_G15_MACRO_PRESET3].brightness =
!!(g15->transfer_buf[1] & 0x20);
g15->leds[LG_G15_MACRO_RECORD].brightness =
!!(g15->transfer_buf[1] & 0x10);
return 0;
}
static enum led_brightness lg_g510_mkey_led_get(struct led_classdev *led_cdev)
{
struct lg_g15_led *g15_led =
container_of(led_cdev, struct lg_g15_led, cdev);
struct lg_g15_data *g15 = dev_get_drvdata(led_cdev->dev->parent);
enum led_brightness brightness;
mutex_lock(&g15->mutex);
lg_g510_update_mkey_led_brightness(g15);
brightness = g15->leds[g15_led->led].brightness;
mutex_unlock(&g15->mutex);
return brightness;
}
static int lg_g510_mkey_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct lg_g15_led *g15_led =
container_of(led_cdev, struct lg_g15_led, cdev);
struct lg_g15_data *g15 = dev_get_drvdata(led_cdev->dev->parent);
u8 val, mask = 0;
int i, ret;
/* Ignore LED off on unregister / keyboard unplug */
if (led_cdev->flags & LED_UNREGISTERING)
return 0;
mutex_lock(&g15->mutex);
for (i = LG_G15_MACRO_PRESET1; i < LG_G15_LED_MAX; i++) {
if (i == g15_led->led)
val = brightness;
else
val = g15->leds[i].brightness;
if (val)
mask |= 0x80 >> (i - LG_G15_MACRO_PRESET1);
}
g15->transfer_buf[0] = LG_G510_FEATURE_M_KEYS_LEDS;
g15->transfer_buf[1] = mask;
ret = hid_hw_raw_request(g15->hdev, LG_G510_FEATURE_M_KEYS_LEDS,
g15->transfer_buf, 2,
HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
if (ret == 2) {
/* Success */
g15_led->brightness = brightness;
ret = 0;
} else {
hid_err(g15->hdev, "Error setting LED brightness: %d\n", ret);
ret = (ret < 0) ? ret : -EIO;
}
mutex_unlock(&g15->mutex);
return ret;
}
/******** Generic LED functions ********/
static int lg_g15_get_initial_led_brightness(struct lg_g15_data *g15)
{
@ -372,7 +456,7 @@ static int lg_g15_get_initial_led_brightness(struct lg_g15_data *g15)
if (ret)
return ret;
return 0;
return lg_g510_update_mkey_led_brightness(g15);
}
return -EINVAL; /* Never reached */
}
@ -606,8 +690,11 @@ static int lg_g15_register_led(struct lg_g15_data *g15, int i)
g15->leds[i].cdev.groups = lg_g510_kbd_led_groups;
break;
default:
/* TODO: Add support for M1 - M3 and MR leds */
return 0;
g15->leds[i].cdev.brightness_set_blocking =
lg_g510_mkey_led_set;
g15->leds[i].cdev.brightness_get =
lg_g510_mkey_led_get;
g15->leds[i].cdev.max_brightness = 1;
}
break;
}