linux-kernel - [PATCH] counter: 104-quad-8: Fix Synapse action reported for Index signals

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Date:   Thu, 16 Mar 2023 16:34:26 -0400
From:   William Breathitt Gray <william.gray@...aro.org>
To:     linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        William Breathitt Gray <william.gray@...aro.org>,
        stable@...r.kernel.org
Subject: [PATCH] counter: 104-quad-8: Fix Synapse action reported for Index signals

Signal 16 and higher represent the device's Index lines. The
priv->preset_enable array holds the device configuration for these Index
lines. The preset_enable configuration is active low on the device, so
invert the conditional check in quad8_action_read() to properly handle
the logical state of preset_enable.

Fixes: f1d8a071d45b ("counter: 104-quad-8: Add Generic Counter interface support")
Cc: <stable@...r.kernel.org>
Signed-off-by: William Breathitt Gray <william.gray@...aro.org>
---
 drivers/counter/104-quad-8.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index deed4afadb29..529bce4ee631 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -378,7 +378,7 @@ static int quad8_action_read(struct counter_device *counter,
 
 	/* Handle Index signals */
 	if (synapse->signal->id >= 16) {
-		if (priv->preset_enable[count->id])
+		if (!priv->preset_enable[count->id])
 			*action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
 		else
 			*action = COUNTER_SYNAPSE_ACTION_NONE;

base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
-- 
2.39.2