[PATCH 3.13 041/163] Input: elantech - fix detection of touchpad on ASUS s301l
Kamal Mostafa
kamal at canonical.com
Thu Oct 9 21:01:06 UTC 2014
3.13.11.9 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede <hdegoede at redhat.com>
commit 271329b3c798b2102120f5df829071c211ef00ed upstream.
Adjust Elantech signature validation to account fo rnewer models of
touchpads.
Reported-and-tested-by: Màrius Monton <marius.monton at gmail.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov at gmail.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.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 233516a..0b75b57 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1253,6 +1253,13 @@ 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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