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Input: elantech - fix detection of touchpads where the revision matches a known rate

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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>
This commit is contained in:
Hans de Goede 2015-06-02 10:40:50 -07:00 committed by Dmitry Torokhov
parent 77b071e793
commit 5f0ee9d17a
1 changed files with 4 additions and 3 deletions
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7
drivers/input/mouse/elantech.c
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@ -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++)