Commit d899520b authored by KT Liao's avatar KT Liao Committed by Dmitry Torokhov
Browse files

Input: elantech - force relative mode on a certain module 



One of Elan modules with sample version is 0x74 and hw_version is 0x03 has
a bug in absolute mode implementation, so let it run in default PS/2
relative mode.

Signed-off-by: default avatarKT Liao <kt.liao@emc.com.tw>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent a2eaf299

drivers/input/mouse/elantech.c

+11 −0
Original line number Diff line number Diff line
@@ -1687,6 +1687,17 @@ 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 which makes absolute mode

		 * unusable, so let's abort so we'll be using standard

		 * PS/2 protocol.

		 */

		psmouse_info(psmouse,

			     "absolute mode broken, forcing standard PS/2 protocol\n");

		goto init_fail;

	}



	if (elantech_set_absolute_mode(psmouse)) {

		psmouse_err(psmouse,

			    "failed to put touchpad into absolute mode.\n");

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