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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: linux-input@vger.kernel.org,
	Nuno Sa <nuno.sa@analog.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/4] Input: adxl34x - switch to using managed resources
Date: Mon, 10 Jun 2024 09:42:59 -0700
Message-ID: <20240610164301.1048482-3-dmitry.torokhov@gmail.com>
In-Reply-To: <20240610164301.1048482-1-dmitry.torokhov@gmail.com>
References: <20240610164301.1048482-1-dmitry.torokhov@gmail.com>
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Switch the driver to use managed resources to simplify error handling.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

v2: conversion to using input_set_capability() moved to a separate patch

 drivers/input/misc/adxl34x-i2c.c |  8 -----
 drivers/input/misc/adxl34x-spi.c |  8 -----
 drivers/input/misc/adxl34x.c     | 53 ++++++++++----------------------
 drivers/input/misc/adxl34x.h     |  1 -
 4 files changed, 17 insertions(+), 53 deletions(-)

diff --git a/drivers/input/misc/adxl34x-i2c.c b/drivers/input/misc/adxl34x-i2c.c
index 7531c7b2d657..c05d898898e8 100644
--- a/drivers/input/misc/adxl34x-i2c.c
+++ b/drivers/input/misc/adxl34x-i2c.c
@@ -98,13 +98,6 @@ static int adxl34x_i2c_probe(struct i2c_client *client)
 	return 0;
 }
 
-static void adxl34x_i2c_remove(struct i2c_client *client)
-{
-	struct adxl34x *ac = i2c_get_clientdata(client);
-
-	adxl34x_remove(ac);
-}
-
 static const struct i2c_device_id adxl34x_id[] = {
 	{ "adxl34x" },
 	{ }
@@ -137,7 +130,6 @@ static struct i2c_driver adxl34x_driver = {
 		.of_match_table = adxl34x_of_id,
 	},
 	.probe    = adxl34x_i2c_probe,
-	.remove   = adxl34x_i2c_remove,
 	.id_table = adxl34x_id,
 };
 
diff --git a/drivers/input/misc/adxl34x-spi.c b/drivers/input/misc/adxl34x-spi.c
index 2befcc4df0be..fd716d861832 100644
--- a/drivers/input/misc/adxl34x-spi.c
+++ b/drivers/input/misc/adxl34x-spi.c
@@ -87,13 +87,6 @@ static int adxl34x_spi_probe(struct spi_device *spi)
 	return 0;
 }
 
-static void adxl34x_spi_remove(struct spi_device *spi)
-{
-	struct adxl34x *ac = spi_get_drvdata(spi);
-
-	adxl34x_remove(ac);
-}
-
 static struct spi_driver adxl34x_driver = {
 	.driver = {
 		.name = "adxl34x",
@@ -101,7 +94,6 @@ static struct spi_driver adxl34x_driver = {
 		.pm = pm_sleep_ptr(&adxl34x_pm),
 	},
 	.probe   = adxl34x_spi_probe,
-	.remove  = adxl34x_spi_remove,
 };
 
 module_spi_driver(adxl34x_driver);
diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c
index 830acf29c32b..c6c34005f5d2 100644
--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -707,21 +707,21 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 	struct adxl34x *ac;
 	struct input_dev *input_dev;
 	const struct adxl34x_platform_data *pdata;
-	int err, range, i;
+	int error, range, i;
 	int revid;
 
 	if (!irq) {
 		dev_err(dev, "no IRQ?\n");
-		err = -ENODEV;
-		goto err_out;
+		return ERR_PTR(-ENODEV);
 	}
 
-	ac = kzalloc(sizeof(*ac), GFP_KERNEL);
-	input_dev = input_allocate_device();
-	if (!ac || !input_dev) {
-		err = -ENOMEM;
-		goto err_free_mem;
-	}
+	ac = devm_kzalloc(dev, sizeof(*ac), GFP_KERNEL);
+	if (!ac)
+		return ERR_PTR(-ENOMEM);
+
+	input_dev = devm_input_allocate_device(dev);
+	if (!input_dev)
+		return ERR_PTR(-ENOMEM);
 
 	ac->fifo_delay = fifo_delay_default;
 
@@ -754,14 +754,12 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 		break;
 	default:
 		dev_err(dev, "Failed to probe %s\n", input_dev->name);
-		err = -ENODEV;
-		goto err_free_mem;
+		return ERR_PTR(-ENODEV);
 	}
 
 	snprintf(ac->phys, sizeof(ac->phys), "%s/input0", dev_name(dev));
 
 	input_dev->phys = ac->phys;
-	input_dev->dev.parent = dev;
 	input_dev->id.product = ac->model;
 	input_dev->id.bustype = bops->bustype;
 	input_dev->open = adxl34x_input_open;
@@ -816,16 +814,16 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 
 	AC_WRITE(ac, POWER_CTL, 0);
 
-	err = request_threaded_irq(ac->irq, NULL, adxl34x_irq,
-				   IRQF_ONESHOT, dev_name(dev), ac);
-	if (err) {
+	error = devm_request_threaded_irq(dev, ac->irq, NULL, adxl34x_irq,
+					  IRQF_ONESHOT, dev_name(dev), ac);
+	if (error) {
 		dev_err(dev, "irq %d busy?\n", ac->irq);
-		goto err_free_mem;
+		return ERR_PTR(error);
 	}
 
-	err = input_register_device(input_dev);
-	if (err)
-		goto err_free_irq;
+	error = input_register_device(input_dev);
+	if (error)
+		return ERR_PTR(error);
 
 	AC_WRITE(ac, OFSX, pdata->x_axis_offset);
 	ac->hwcal.x = pdata->x_axis_offset;
@@ -884,26 +882,9 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 	ac->pdata.power_mode &= (PCTL_AUTO_SLEEP | PCTL_LINK);
 
 	return ac;
-
- err_free_irq:
-	free_irq(ac->irq, ac);
- err_free_mem:
-	input_free_device(input_dev);
-	kfree(ac);
- err_out:
-	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(adxl34x_probe);
 
-void adxl34x_remove(struct adxl34x *ac)
-{
-	free_irq(ac->irq, ac);
-	input_unregister_device(ac->input);
-	dev_dbg(ac->dev, "unregistered accelerometer\n");
-	kfree(ac);
-}
-EXPORT_SYMBOL_GPL(adxl34x_remove);
-
 EXPORT_GPL_SIMPLE_DEV_PM_OPS(adxl34x_pm, adxl34x_suspend, adxl34x_resume);
 
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
diff --git a/drivers/input/misc/adxl34x.h b/drivers/input/misc/adxl34x.h
index 67e0ddc5c3eb..718e90c2046d 100644
--- a/drivers/input/misc/adxl34x.h
+++ b/drivers/input/misc/adxl34x.h
@@ -23,7 +23,6 @@ struct adxl34x_bus_ops {
 struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 			      bool fifo_delay_default,
 			      const struct adxl34x_bus_ops *bops);
-void adxl34x_remove(struct adxl34x *ac);
 
 extern const struct dev_pm_ops adxl34x_pm;
 extern const struct attribute_group *adxl34x_groups[];
-- 
2.45.2.505.gda0bf45e8d-goog