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[2/2] Input: atmel_mxt_ts - mXT224 DMA quirk was fixed in firmware v2.0.AA

Message ID 1407420438-6289-3-git-send-email-nick.dyer@itdev.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Nick Dyer Aug. 7, 2014, 2:07 p.m. UTC 
From: Nick Dyer <nick.dyer@itdev.co.uk>

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

Comments

Benson Leung Aug. 26, 2014, 8:10 p.m. UTC | #1 
On Thu, Aug 7, 2014 at 7:07 AM, <nick.dyer@itdev.co.uk> wrote:
>
> From: Nick Dyer <nick.dyer@itdev.co.uk>
>
> Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>

Reviewed-by: Benson Leung <bleung@chromium.org>
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Patch

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index da497db..67ea728 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -1424,10 +1424,12 @@  static int mxt_get_object_table(struct mxt_data *data)
 
 		switch (object->type) {
 		case MXT_GEN_MESSAGE_T5:
-			if (data->info.family_id == 0x80) {
+			if ((data->info.family_id == 0x80)
+			    && (data->info.version < 0x20)) {
 				/*
-				 * On mXT224 read and discard unused CRC byte
-				 * otherwise DMA reads are misaligned
+				 * On mXT224 firmware versions prior to V2.0
+				 * read and discard unused CRC byte otherwise
+				 * DMA reads are misaligned
 				 */
 				data->T5_msg_size = mxt_obj_size(object);
 			} else {