[PATCH v4 07/10] HID: steelseries: Correct Arctis 9 battery calibration range

[Sriman Achanta <srimanachanta@gmail.com>]

Map the Arctis 9 raw battery value over 0x64 (empty) to 0x9a (full)
instead of 0x68 to 0x9d. These values match the HeadsetControl project
[1] and fit the calibration points from an independent reverse
engineering of the battery tray (about 25% at raw 112, 50% at raw 125)
[2].

I do not have this headset. The values come from those references and
were not measured directly.

[1] https://github.com/Sapd/HeadsetControl/blob/master/lib/devices/steelseries_arctis_9.hpp
[2] https://magnier.io/reverse-engineering-arctis-9-battery-tray/

Signed-off-by: Sriman Achanta <srimanachanta@gmail.com>
---
 drivers/hid/hid-steelseries-arctis.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-steelseries-arctis.c b/drivers/hid/hid-steelseries-arctis.c
index 4be586db0004..1f0e9cb5138f 100644
--- a/drivers/hid/hid-steelseries-arctis.c
+++ b/drivers/hid/hid-steelseries-arctis.c
@@ -146,7 +146,7 @@ static void steelseries_arctis_9_parse_status(struct steelseries_device *sd,
 	if (data[0] == 0xaa) {
 		sd->headset_connected = (data[1] == 0x01);
 		sd->battery_charging = (data[4] == 0x01);
-		sd->battery_capacity = steelseries_map_capacity(data[3], 0x68, 0x9d);
+		sd->battery_capacity = steelseries_map_capacity(data[3], 0x64, 0x9a);
 	}
 }
 
-- 
2.54.0