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Commit 8f93b0b2 authored by Jason Gerecke's avatar Jason Gerecke Committed by Jiri Kosina
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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: default avatarJason Gerecke <killertofu@gmail.com>
Acked-by: default avatarPing Cheng <pingc@wacom.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent fce9957d

drivers/hid/wacom_wac.c

+25 −0
Original line number Diff line number Diff line
@@ -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;

}