From 5f0ee9d17aae628b22be86966471db65be21f262 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 2 Jun 2015 10:40:50 -0700 Subject: [PATCH] Input: elantech - fix detection of touchpads where the revision matches a known rate MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Hans de Goede Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/elantech.c | 7 ++++--- 1 file 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++) -- 2.7.4