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    Subject[PATCH 3.11 159/272] HID:hid-lg4ff: Switch autocentering off when strength is set to zero.
    Date
    3.11.10.1 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Simon Wood <simon@mungewell.org>

    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@gmail.com>
    Signed-off-by: Simon Wood <simon@mungewell.org>
    Signed-off-by: Jiri Kosina <jkosina@suse.cz>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    drivers/hid/hid-lg4ff.c | 25 +++++++++++++++++++++++++
    1 file changed, 25 insertions(+)

    diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
    index 530fcd19..49f6cc0 100644
    --- a/drivers/hid/hid-lg4ff.c
    +++ b/drivers/hid/hid-lg4ff.c
    @@ -220,6 +220,20 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
    __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;
    @@ -237,6 +251,17 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
    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);
    }

    /* Sends autocentering command compatible with Formula Force EX */
    --
    1.8.3.2


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