diff options
| author | Jason Gerecke <killertofu@gmail.com> | 2015-03-06 22:47:41 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2015-03-11 18:46:12 +0300 |
| commit | 8f93b0b2b0a336746adc8730921b219f0ba40c29 (patch) | |
| tree | 290aaf611dce08c323e74da32e61770ba2465625 /drivers/hid | |
| parent | fce9957d8f618346b76c63066e146fc76ed975ce (diff) | |
| download | linux-8f93b0b2b0a336746adc8730921b219f0ba40c29.tar.xz | |
HID: wacom: Provide battery charge state to system over USB if available
If a wireless adapter (which contains the charging circuitry) is
detected as being attached to the tablet then create a new battery
interface and update its status as data is reported. Also destroy the
battery if the adapter goes away.
Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/wacom_wac.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 5d57fec177a8..f1e53f15abb5 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1952,6 +1952,7 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len) static int wacom_status_irq(struct wacom_wac *wacom_wac, size_t len) { + struct wacom *wacom = container_of(wacom_wac, struct wacom, wacom_wac); struct wacom_features *features = &wacom_wac->features; unsigned char *data = wacom_wac->data; @@ -1965,6 +1966,30 @@ static int wacom_status_irq(struct wacom_wac *wacom_wac, size_t len) SW_MUTE_DEVICE, data[8] & 0x40); input_sync(wacom_wac->shared->touch_input); } + + if (data[9] & 0x02) { /* wireless module is attached */ + int battery = (data[8] & 0x3f) * 100 / 31; + bool ps_connected = !!(data[8] & 0x80); + bool charging = ps_connected && + wacom_wac->battery_capacity < 100; + + wacom_notify_battery(wacom_wac, battery, charging, + ps_connected); + + if (!wacom->battery.dev && + !(features->quirks & WACOM_QUIRK_BATTERY)) { + features->quirks |= WACOM_QUIRK_BATTERY; + INIT_WORK(&wacom->work, wacom_battery_work); + wacom_schedule_work(wacom_wac); + } + } + else if ((features->quirks & WACOM_QUIRK_BATTERY) && + wacom->battery.dev) { + features->quirks &= ~WACOM_QUIRK_BATTERY; + INIT_WORK(&wacom->work, wacom_battery_work); + wacom_schedule_work(wacom_wac); + wacom_notify_battery(wacom_wac, 0, 0, 0); + } return 0; } |