3.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Simon Wood <simon@xxxxxxxxxxxxx>
commit d2c02da549b468bbb28e67d269bd3c9e10683ff5 upstream.
When the autocenter is set to zero, this patch issues a command to
totally disable the autocenter - this results in less resistance
in the wheel.
Reported-by: Elias Vanderstuyft <elias.vds@xxxxxxxxx>
Signed-off-by: Simon Wood <simon@xxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-lg4ff.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -220,6 +220,20 @@ static void hid_lg4ff_set_autocenter_def
__s32 *value = report->field[0]->value;
__u32 expand_a, expand_b;
+ /* De-activate Auto-Center */
+ if (magnitude == 0) {
+ value[0] = 0xf5;
+ value[1] = 0x00;
+ value[2] = 0x00;
+ value[3] = 0x00;
+ value[4] = 0x00;
+ value[5] = 0x00;
+ value[6] = 0x00;
+
+ hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ return;
+ }
+
if (magnitude <= 0xaaaa) {
expand_a = 0x0c * magnitude;
expand_b = 0x80 * magnitude;
@@ -236,6 +250,17 @@ static void hid_lg4ff_set_autocenter_def
value[5] = 0x00;
value[6] = 0x00;
+ hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+
+ /* Activate Auto-Center */
+ value[0] = 0x14;
+ value[1] = 0x00;
+ value[2] = 0x00;
+ value[3] = 0x00;
+ value[4] = 0x00;
+ value[5] = 0x00;
+ value[6] = 0x00;
+
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
}
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