linux-kernel - [PATCH 4.4 12/76] Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw

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Message-Id: <20170328122600.486879071@linuxfoundation.org>
Date:   Tue, 28 Mar 2017 14:30:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Matjaz Hegedic <matjaz.hegedic@...il.com>,
        KT Liao <kt.liao@....com.tw>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: [PATCH 4.4 12/76] Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matjaz Hegedic <matjaz.hegedic@...il.com>

commit 92ef6f97a66e580189a41a132d0f8a9f78d6ddce upstream.

EeeBook X205TA is yet another ASUS device with a special touchpad
firmware that needs to be accounted for during initialization, or
else the touchpad will go into an invalid state upon suspend/resume.
Adding the appropriate ic_type and product_id check fixes the problem.

Signed-off-by: Matjaz Hegedic <matjaz.hegedic@...il.com>
Acked-by: KT Liao <kt.liao@....com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/input/mouse/elan_i2c_core.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -218,17 +218,19 @@ static int elan_query_product(struct ela
 
 static int elan_check_ASUS_special_fw(struct elan_tp_data *data)
 {
-	if (data->ic_type != 0x0E)
-		return false;
-
-	switch (data->product_id) {
-	case 0x05 ... 0x07:
-	case 0x09:
-	case 0x13:
+	if (data->ic_type == 0x0E) {
+		switch (data->product_id) {
+		case 0x05 ... 0x07:
+		case 0x09:
+		case 0x13:
+			return true;
+		}
+	} else if (data->ic_type == 0x08 && data->product_id == 0x26) {
+		/* ASUS EeeBook X205TA */
 		return true;
-	default:
-		return false;
 	}
+
+	return false;
 }
 
 static int __elan_initialize(struct elan_tp_data *data)