linux-kernel - [PATCH v5 2/4] Input: atmel_mxt_ts - move calls to register the input device to separate function

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Message-ID: <20240708071601.7571-3-eichest@gmail.com>
Date: Mon,  8 Jul 2024 09:15:49 +0200
From: Stefan Eichenberger <eichest@...il.com>
To: nick@...anahar.org,
	dmitry.torokhov@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	nicolas.ferre@...rochip.com,
	alexandre.belloni@...tlin.com,
	claudiu.beznea@...on.dev,
	linus.walleij@...aro.org,
	francesco.dolcini@...adex.com,
	joao.goncalves@...adex.com
Cc: linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Stefan Eichenberger <stefan.eichenberger@...adex.com>
Subject: [PATCH v5 2/4] Input: atmel_mxt_ts - move calls to register the input device to separate function

From: Stefan Eichenberger <stefan.eichenberger@...adex.com>

The calls to register the input device are moved to a separate function
so that we can call it without having to confiugre the device. This is
necessary if we want to power on the device only when it is opened.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>
Reviewed-by: Joao Paulo Goncalves <joao.goncalves@...adex.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 34 +++++++++++++++++-------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 4fc83a4cabd9b..85f3c685bf526 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -2277,6 +2277,28 @@ static void mxt_config_cb(const struct firmware *cfg, void *ctx)
 	release_firmware(cfg);
 }
 
+static void mxt_debug_init(struct mxt_data *data);
+
+static int mxt_device_register(struct mxt_data *data)
+{
+	int error;
+
+	/* If input device is not already registered */
+	if (!data->input_dev) {
+		if (data->multitouch) {
+			error = mxt_initialize_input_device(data);
+			if (error)
+				return error;
+		} else {
+			dev_warn(&data->client->dev, "No touch object detected\n");
+		}
+
+		mxt_debug_init(data);
+	}
+
+	return 0;
+}
+
 static int mxt_initialize(struct mxt_data *data)
 {
 	struct i2c_client *client = data->client;
@@ -2831,15 +2853,9 @@ static int mxt_configure_objects(struct mxt_data *data,
 			dev_warn(dev, "Error %d updating config\n", error);
 	}
 
-	if (data->multitouch) {
-		error = mxt_initialize_input_device(data);
-		if (error)
-			return error;
-	} else {
-		dev_warn(dev, "No touch object detected\n");
-	}
-
-	mxt_debug_init(data);
+	error = mxt_device_register(data);
+	if (error)
+		return error;
 
 	return 0;
 }
-- 
2.43.0