Thread (4 messages) 4 messages, 3 authors, 2011-11-09

Re: [PATCH] Input: elantech: adjust hw_version detection logic

From: Marc Dietrich <marvin24@gmx.de>
Date: 2011-11-08 17:55:58

hi Jj,

On Tuesday 08 November 2011 20:08:19 JJ Ding wrote:
This patch fixes some v3 hardware (fw_version: 0x150500) wrongly detected
as v2 hardware.

Reported-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: JJ Ding <redacted>
---
Hi list,

This is patched against v3.2-rc1.

Marc, could you please test this again? Thanks a lot.
patch works fine here. You may add:

	Tested-By: Marc Dietrich [off-list ref]

Btw, are there any known issues with suspend/resume? The touchpad doesn't seem 
to wakeup again after resume, but that's propably a problem of our kbd 
controller driver. Just in case there's something known...

Thanks Marc
quoted hunk ↗ jump to hunk
 drivers/input/mouse/elantech.c |   26 ++++++++++++++++++--------
 1 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 09b93b1..e2a9867 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1210,18 +1210,28 @@ static int elantech_reconnect(struct psmouse
*psmouse) */
 static int elantech_set_properties(struct elantech_data *etd)
 {
+	/* This represents the version of IC body. */
 	int ver = (etd->fw_version & 0x0f0000) >> 16;

+	/* Early version of Elan touchpads doesn't obey the rule. */
 	if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
 		etd->hw_version = 1;
-	else if (etd->fw_version < 0x150600)
-		etd->hw_version = 2;
-	else if (ver == 5)
-		etd->hw_version = 3;
-	else if (ver == 6)
-		etd->hw_version = 4;
-	else
-		return -1;
+	else {
+		switch (ver) {
+		case 2:
+		case 4:
+			etd->hw_version = 2;
+			break;
+		case 5:
+			etd->hw_version = 3;
+			break;
+		case 6:
+			etd->hw_version = 4;
+			break;
+		default:
+			return -1;
+		}
+	}

 	/*
 	 * Turn on packet checking by default.
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