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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>
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1 changed files with 4 additions and 3 deletions
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@ -1376,10 +1376,11 @@ static bool elantech_is_signature_valid(const unsigned char *param)
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return true;
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/*
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* Some models have a revision higher then 20. Meaning param[2] may
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* be 10 or 20, skip the rates check for these.
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* Some hw_version >= 4 models have a revision higher then 20. Meaning
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* that param[2] may be 10 or 20, skip the rates check for these.
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*/
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if (param[0] == 0x46 && (param[1] & 0xef) == 0x0f && param[2] < 40)
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if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
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param[2] < 40)
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return true;
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for (i = 0; i < ARRAY_SIZE(rates); i++)
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