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Subject[PATCH 3.2 030/102] Input: elantech - fix detection of touchpad on ASUS s301l
3.2.64-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Hans de Goede <hdegoede@redhat.com>

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: Ben Hutchings <ben@decadent.org.uk>
---
drivers/input/mouse/elantech.c | 7 +++++++
1 file changed, 7 insertions(+)

--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1130,6 +1130,13 @@ static bool elantech_is_signature_valid(
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;
--
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