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authorHans de Goede <hdegoede@redhat.com>2015-06-02 17:40:50 (GMT)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-06-02 17:43:07 (GMT)
commit5f0ee9d17aae628b22be86966471db65be21f262 (patch)
treee61400aa61145e3c7f1ec2d0be2895756ee7556a /drivers/input
parent77b071e7931dd762563ac74e3e448b2aef23ad2f (diff)
downloadlinux-5f0ee9d17aae628b22be86966471db65be21f262.tar.xz
Input: elantech - fix detection of touchpads where the revision matches a known rate
Make the check to skip the rate check more lax, so that it applies to all hw_version 4 models. This fixes the touchpad not being detected properly on Asus PU551LA laptops. Cc: stable@vger.kernel.org Reported-and-tested-by: David Zafra Gómez <dezeta@klo.es> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/mouse/elantech.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 79363b6..f181d73 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1376,10 +1376,11 @@ static bool elantech_is_signature_valid(const unsigned char *param)
return true;
/*
- * Some models have a revision higher then 20. Meaning param[2] may
- * be 10 or 20, skip the rates check for these.
+ * Some hw_version >= 4 models have a revision higher then 20. Meaning
+ * that param[2] may be 10 or 20, skip the rates check for these.
*/
- if (param[0] == 0x46 && (param[1] & 0xef) == 0x0f && param[2] < 40)
+ if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
+ param[2] < 40)
return true;
for (i = 0; i < ARRAY_SIZE(rates); i++)