HID: wacom: generic: Scale battery capacity measurements to percentages (37d16019) · Commits · 戴 / test

The power_supply subsystem expects us to provide it with capacity values measured in percent. In particular, AES devices (HID_DG_BATTERYSTRENGTH) use the range 0-255, which needs to be rescaled. The MobileStudio Pro (WACOM_HID_WD_BATTERY_LEVEL) uses the range 0-100, but there's no guarantee that future devices will share the same range. Signed-off-by:

Jason Gerecke <jason.gerecke@wacom.com> Reviewed-by:

Ping Cheng <ping.cheng@wacom.com> Signed-off-by:

Jiri Kosina <jkosina@suse.cz>

drivers/hid/wacom_wac.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1811,6 +1811,7 @@ static void wacom_wac_pad_battery_event(struct hid_device *hdev, struct hid_fiel

		switch (equivalent_usage) {
		case WACOM_HID_WD_BATTERY_LEVEL:
		value = value * 100 / (field->logical_maximum - field->logical_minimum);
		wacom_wac->hid_data.battery_capacity = value;
		wacom_wac->hid_data.bat_connected = 1;
		break;
		@@ -2035,6 +2036,7 @@ static void wacom_wac_pen_event(struct hid_device hdev, struct hid_field field
		wacom_wac->hid_data.sense_state = value;
		return;
		case HID_DG_BATTERYSTRENGTH:
		value = value * 100 / (field->logical_maximum - field->logical_minimum);
		wacom_wac->hid_data.battery_capacity = value;
		wacom_wac->hid_data.bat_connected = 1;
		break;

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