linux-kernel - [PATCH 1/3] input: alps: Reset mouse before identifying it

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Message-Id: <1412329392-5580-2-git-send-email-pali.rohar@gmail.com>
Date:	Fri,  3 Oct 2014 11:43:10 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Yunkang Tang <yunkang.tang@...alps.com>,
	Tommy Will <tommywill2011@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pali Rohár <pali.rohar@...il.com>
Subject: [PATCH 1/3] input: alps: Reset mouse before identifying it

On some systems after starting computer function alps_identify() does not detect
dual ALPS touchpad+trackstick device correctly and detect only touchpad.

Resetting ALPS device before identifiying it fixing this problem and both parts
touchpad and trackstick are detected.

Signed-off-by: Pali Rohár <pali.rohar@...il.com>
Tested-by: Pali Rohár <pali.rohar@...il.com>
---
 drivers/input/mouse/alps.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 35a49bf..1bd5aa1 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -2403,6 +2403,8 @@ int alps_detect(struct psmouse *psmouse, bool set_properties)
 {
 	struct alps_data dummy;
 
+	psmouse_reset(psmouse);
+
 	if (alps_identify(psmouse, &dummy) < 0)
 		return -1;
 
-- 
1.7.9.5

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