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Date:   Mon, 12 Dec 2016 15:11:03 +0800
From:   KT Liao <kt.liao@....com.tw>
To:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        dmitry.torokhov@...il.com
Cc:     phoenix@....com.tw, kt.liao@....com.tw
Subject: [PATCH] Input: elantech - force a module ignore ABS mode

One Elan sample which sample version is 0x74 and hw_version is 0x04 has a bug in abs mode, so let it run in default mode
Signed-off-by: KT Liao <kt.liao@....com.tw>
---
 drivers/input/mouse/elantech.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index db7d1d6..f1c2d10 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1687,6 +1687,13 @@ int elantech_init(struct psmouse *psmouse)
 			     etd->samples[0], etd->samples[1], etd->samples[2]);
 	}
 
+	if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) {
+		/*This module has a bug in absolute mode, let it be defualt mode  */
+		psmouse_info(psmouse,
+			     "This module only active in default mode\n");
+		goto init_fail;
+	}
+
 	if (elantech_set_absolute_mode(psmouse)) {
 		psmouse_err(psmouse,
 			    "failed to put touchpad into absolute mode.\n");
-- 
2.7.4

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