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: [email protected]
Reported-and-tested-by: David Zafra Gómez <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>
---
 drivers/input/mouse/elantech.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 79363b6..e605303 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1379,7 +1379,8 @@ static bool elantech_is_signature_valid(const unsigned 
char *param)
         * 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)
+       if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f &&
+           param[2] < 40)
                return true;
 
        for (i = 0; i < ARRAY_SIZE(rates); i++)
-- 
2.4.1

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