1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 50af72baa5ca..2b63487057c2 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -579,6 +579,28 @@ void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 }
 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 
+static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+                unsigned int *rsize)
+{
+        /*
+         * Checks if the report descriptor of Thinkpad Helix 2 has a logical
+         * minimum for magnetic flux axis greater than the maximum.
+         */
+        if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
+                *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
+                rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
+                rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
+                rdesc[921] == 0x07 && rdesc[922] == 0x00) {
+                /* Sets negative logical minimum for mag x, y and z */
+                rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
+                rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
+                rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
+                rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
+        }
+
+        return rdesc;
+}
+
 static int sensor_hub_probe(struct hid_device *hdev,
                                 const struct hid_device_id *id)
 {
@@ -743,6 +765,7 @@ static struct hid_driver sensor_hub_driver = {
         .probe = sensor_hub_probe,
         .remove = sensor_hub_remove,
         .raw_event = sensor_hub_raw_event,
+        .report_fixup = sensor_hub_report_fixup,
 #ifdef CONFIG_PM
         .suspend = sensor_hub_suspend,
         .resume = sensor_hub_resume,