linux-kernel - [PATCH v2 1/3] input/touchscreen: imagis: Clarify the usage of protocol

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Message-ID: <20240613025631.5425-2-raymondhackley@protonmail.com>
Date: Thu, 13 Jun 2024 02:56:54 +0000
From: Raymond Hackley <raymondhackley@...tonmail.com>
To: linux-kernel@...r.kernel.org
Cc: Markuss Broks <markuss.broks@...il.com>, Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Stephan Gerhold <stephan@...hold.net>, Nikita Travkin <nikita@...n.ru>, linux-input@...r.kernel.org, devicetree@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: [PATCH v2 1/3] input/touchscreen: imagis: Clarify the usage of protocol_b

protocol_b is a property, which tells Imagis panel to use a different
format for coordinates.

IST30XXC series is known for using protocol B, while the other series
aren't. Note this could be confusing, unlike the model name implies.

Adjust the usage of protocol_b to avoid confusion.

Signed-off-by: Raymond Hackley <raymondhackley@...tonmail.com>
---
 drivers/input/touchscreen/imagis.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/imagis.c b/drivers/input/touchscreen/imagis.c
index 074dd6c342ec..886bcfc8497a 100644
--- a/drivers/input/touchscreen/imagis.c
+++ b/drivers/input/touchscreen/imagis.c
@@ -120,12 +120,12 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id)
 
 	for (i = 0; i < finger_count; i++) {
 		if (ts->tdata->protocol_b)
-			error = imagis_i2c_read_reg(ts,
-						    ts->tdata->touch_coord_cmd, &finger_status);
-		else
 			error = imagis_i2c_read_reg(ts,
 						    ts->tdata->touch_coord_cmd + (i * 4),
 						    &finger_status);
+		else
+			error = imagis_i2c_read_reg(ts,
+						    ts->tdata->touch_coord_cmd, &finger_status);
 		if (error) {
 			dev_err(&ts->client->dev,
 				"failed to read coordinates for finger %d: %d\n",
@@ -394,6 +394,7 @@ static const struct imagis_properties imagis_3032c_data = {
 	.whoami_cmd = IST3038C_REG_CHIPID,
 	.whoami_val = IST3032C_WHOAMI,
 	.touch_keys_supported = true,
+	.protocol_b = true,
 };
 
 static const struct imagis_properties imagis_3038b_data = {
@@ -401,7 +402,6 @@ static const struct imagis_properties imagis_3038b_data = {
 	.touch_coord_cmd = IST3038B_REG_STATUS,
 	.whoami_cmd = IST3038B_REG_CHIPID,
 	.whoami_val = IST3038B_WHOAMI,
-	.protocol_b = true,
 };
 
 static const struct imagis_properties imagis_3038c_data = {
@@ -409,6 +409,7 @@ static const struct imagis_properties imagis_3038c_data = {
 	.touch_coord_cmd = IST3038C_REG_TOUCH_COORD,
 	.whoami_cmd = IST3038C_REG_CHIPID,
 	.whoami_val = IST3038C_WHOAMI,
+	.protocol_b = true,
 };
 
 #ifdef CONFIG_OF
-- 
2.39.2