iio: imu: inv_mpu6050: use devm_* at init and delete remove

Use devm_* for iio_triggered_buffer_setup, iio_device_register,
iio_trigger_register. Delete unneeded inv_mpu6050_remove_trigger,
inv_mpu_core_remove, and inv_mpu_remove for spi driver.
Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/inv_mpu6050/inv_mpu_core.c

@@ -984,7 +984,7 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
 	indio_dev->info = &mpu_info;
 	indio_dev->modes = INDIO_BUFFER_TRIGGERED;
 
-	result = iio_triggered_buffer_setup(indio_dev,
+	result = devm_iio_triggered_buffer_setup(dev, indio_dev,
 						 inv_mpu6050_irq_handler,
 						 inv_mpu6050_read_fifo,
 						 NULL);
@@ -995,39 +995,21 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
 	result = inv_mpu6050_probe_trigger(indio_dev, irq_type);
 	if (result) {
 		dev_err(dev, "trigger probe fail %d\n", result);
-		goto out_unreg_ring;
+		return result;
 	}
 
 	INIT_KFIFO(st->timestamps);
 	spin_lock_init(&st->time_stamp_lock);
-	result = iio_device_register(indio_dev);
+	result = devm_iio_device_register(dev, indio_dev);
 	if (result) {
 		dev_err(dev, "IIO register fail %d\n", result);
-		goto out_remove_trigger;
+		return result;
 	}
 
 	return 0;
-
-out_remove_trigger:
-	inv_mpu6050_remove_trigger(st);
-out_unreg_ring:
-	iio_triggered_buffer_cleanup(indio_dev);
-	return result;
 }
 EXPORT_SYMBOL_GPL(inv_mpu_core_probe);
 
-int inv_mpu_core_remove(struct device  *dev)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-
-	iio_device_unregister(indio_dev);
-	inv_mpu6050_remove_trigger(iio_priv(indio_dev));
-	iio_triggered_buffer_cleanup(indio_dev);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(inv_mpu_core_remove);
-
 #ifdef CONFIG_PM_SLEEP
 
 static int inv_mpu_resume(struct device *dev)

drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c

@@ -129,14 +129,12 @@ static int inv_mpu_probe(struct i2c_client *client,
 				 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
 				 inv_mpu6050_select_bypass,
 				 inv_mpu6050_deselect_bypass);
-	if (!st->muxc) {
-		result = -ENOMEM;
-		goto out_unreg_device;
-	}
+	if (!st->muxc)
+		return -ENOMEM;
 	st->muxc->priv = dev_get_drvdata(&client->dev);
 	result = i2c_mux_add_adapter(st->muxc, 0, 0, 0);
 	if (result)
-		goto out_unreg_device;
+		return result;
 
 	result = inv_mpu_acpi_create_mux_client(client);
 	if (result)
@@ -146,8 +144,6 @@ static int inv_mpu_probe(struct i2c_client *client,
 
 out_del_mux:
 	i2c_mux_del_adapters(st->muxc);
-out_unreg_device:
-	inv_mpu_core_remove(&client->dev);
 	return result;
 }
 
@@ -159,7 +155,7 @@ static int inv_mpu_remove(struct i2c_client *client)
 	inv_mpu_acpi_delete_mux_client(client);
 	i2c_mux_del_adapters(st->muxc);
 
-	return inv_mpu_core_remove(&client->dev);
+	return 0;
 }
 
 /*

drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h

@@ -301,7 +301,6 @@ enum inv_mpu6050_clock_sel_e {
 irqreturn_t inv_mpu6050_irq_handler(int irq, void *p);
 irqreturn_t inv_mpu6050_read_fifo(int irq, void *p);
 int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type);
-void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st);
 int inv_reset_fifo(struct iio_dev *indio_dev);
 int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask);
 int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val);
@@ -310,5 +309,4 @@ int inv_mpu_acpi_create_mux_client(struct i2c_client *client);
 void inv_mpu_acpi_delete_mux_client(struct i2c_client *client);
 int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
 		int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type);
-int inv_mpu_core_remove(struct device *dev);
 extern const struct dev_pm_ops inv_mpu_pmops;

drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c

@@ -69,11 +69,6 @@ static int inv_mpu_probe(struct spi_device *spi)
 				  inv_mpu_i2c_disable, chip_type);
 }
 
-static int inv_mpu_remove(struct spi_device *spi)
-{
-	return inv_mpu_core_remove(&spi->dev);
-}
-
 /*
  * device id table is used to identify what device can be
  * supported by this driver
@@ -98,7 +93,6 @@ MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
 
 static struct spi_driver inv_mpu_driver = {
 	.probe		=	inv_mpu_probe,
-	.remove		=	inv_mpu_remove,
 	.id_table	=	inv_mpu_id,
 	.driver = {
 		.acpi_match_table = ACPI_PTR(inv_acpi_match),

drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c

@@ -154,7 +154,7 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
 	st->trig->ops = &inv_mpu_trigger_ops;
 	iio_trigger_set_drvdata(st->trig, indio_dev);
 
-	ret = iio_trigger_register(st->trig);
+	ret = devm_iio_trigger_register(&indio_dev->dev, st->trig);
 	if (ret)
 		return ret;
 
@@ -162,8 +162,3 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type)
 
 	return 0;
 }
-
-void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st)
-{
-	iio_trigger_unregister(st->trig);
-}