diff mbox series

[v2,5/9] Input: iqs7222 - handle reset during ATI

Message ID 20220626072412.475211-6-jeff@labundy.com (mailing list archive)
State Accepted
Commit 8635c68891c6d786d644747d599c41bdf512fbbf
Headers show
Series Miscellaneous fixes for Azoteq IQS7222A/B/C | expand

Commit Message

Jeff LaBundy June 26, 2022, 7:24 a.m. UTC 
If the device suffers a spurious reset during ATI, there is no point
in enduring any further retries. Instead, simply return successfully
from the polling loop.

In this case, the interrupt handler will intervene and recognize the
device has been reset. It then proceeds to initialize the device and
trigger ATI once more.

As part of this change, swap the order of status field evaluation to
match that of the interrupt handler, and correct a nearby off-by-one
error that causes an error message to suggest the final attempt will
be retried.

Fixes: e505edaedcb9 ("Input: add support for Azoteq IQS7222A/B/C")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
---
Changes in v2:
 - None

 drivers/input/misc/iqs7222.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c
index aa46f2cd4d34..e65260d290cc 100644
--- a/drivers/input/misc/iqs7222.c
+++ b/drivers/input/misc/iqs7222.c
@@ -1314,12 +1314,15 @@  static int iqs7222_ati_trigger(struct iqs7222_private *iqs7222)
 			if (error)
 				return error;
 
-			if (sys_status & IQS7222_SYS_STATUS_ATI_ACTIVE)
-				continue;
+			if (sys_status & IQS7222_SYS_STATUS_RESET)
+				return 0;
 
 			if (sys_status & IQS7222_SYS_STATUS_ATI_ERROR)
 				break;
 
+			if (sys_status & IQS7222_SYS_STATUS_ATI_ACTIVE)
+				continue;
+
 			/*
 			 * Use stream-in-touch mode if either slider reports
 			 * absolute position.
@@ -1336,7 +1339,7 @@  static int iqs7222_ati_trigger(struct iqs7222_private *iqs7222)
 		dev_err(&client->dev,
 			"ATI attempt %d of %d failed with status 0x%02X, %s\n",
 			i + 1, IQS7222_NUM_RETRIES, (u8)sys_status,
-			i < IQS7222_NUM_RETRIES ? "retrying..." : "stopping");
+			i + 1 < IQS7222_NUM_RETRIES ? "retrying" : "stopping");
 	}
 
 	return -ETIMEDOUT;