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    Subject[PATCH 3.4 25/91] Input: elantech - fix detection of touchpad on ASUS s301l
    Date
    From: Hans de Goede <hdegoede@redhat.com>

    3.4.105-rc1 review patch. If anyone has any objections, please let me know.

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


    commit 271329b3c798b2102120f5df829071c211ef00ed upstream.

    Adjust Elantech signature validation to account fo rnewer models of
    touchpads.

    Reported-and-tested-by: Màrius Monton <marius.monton@gmail.com>
    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
    Signed-off-by: Zefan Li <lizefan@huawei.com>
    ---
    drivers/input/mouse/elantech.c | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
    index d93ea64..f2c2ffe 100644
    --- a/drivers/input/mouse/elantech.c
    +++ b/drivers/input/mouse/elantech.c
    @@ -1218,6 +1218,13 @@ static bool elantech_is_signature_valid(const unsigned char *param)
    if (param[1] == 0)
    return true;

    + /*
    + * Some models have a revision higher then 20. Meaning param[2] may
    + * be 10 or 20, skip the rates check for these.
    + */
    + if (param[0] == 0x46 && (param[1] & 0xef) == 0x0f && param[2] < 40)
    + return true;
    +
    for (i = 0; i < ARRAY_SIZE(rates); i++)
    if (param[2] == rates[i])
    return false;
    --
    1.9.1


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