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Date: Sun, 27 Mar 2022 01:11:43 +0530
From: Jagath Jog J <jagathjog1996@...il.com>
To: dan@...obertson.com, jic23@...nel.org, andy.shevchenko@...il.com
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/5] iio: accel: bma400: conversion to device-managed function
This is a conversion to device-managed by using devm_iio_device_register
inside probe function, now disabling the regulator and putting bma400 to
power down via a devm_add_action_or_reset() hook.
The dev_set_drvdata() call, bma400_remove() function and hooks in the I2C
and SPI driver struct is removed as devm_iio_device_register function is
used to automatically unregister on driver detach.
Signed-off-by: Jagath Jog J <jagathjog1996@...il.com>
---
drivers/iio/accel/bma400.h | 2 -
drivers/iio/accel/bma400_core.c | 77 ++++++++++++++++-----------------
drivers/iio/accel/bma400_i2c.c | 8 ----
drivers/iio/accel/bma400_spi.c | 8 ----
4 files changed, 38 insertions(+), 57 deletions(-)
diff --git a/drivers/iio/accel/bma400.h b/drivers/iio/accel/bma400.h
index 190366debdb3..c1b3dbfbd98f 100644
--- a/drivers/iio/accel/bma400.h
+++ b/drivers/iio/accel/bma400.h
@@ -112,6 +112,4 @@ extern const struct regmap_config bma400_regmap_config;
int bma400_probe(struct device *dev, struct regmap *regmap, const char *name);
-void bma400_remove(struct device *dev);
-
#endif
diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
index fd2647b728d3..dc273381a0a2 100644
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@@ -560,6 +560,26 @@ static void bma400_init_tables(void)
}
}
+static void bma400_regulators_disable(void *data_ptr)
+{
+ struct bma400_data *data = data_ptr;
+
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
+}
+
+static void bma400_power_disable(void *data_ptr)
+{
+ struct bma400_data *data = data_ptr;
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = bma400_set_power_mode(data, POWER_MODE_SLEEP);
+ if (ret)
+ dev_warn(data->dev, "Failed to put device into sleep mode (%pe)\n",
+ ERR_PTR(ret));
+ mutex_unlock(&data->mutex);
+}
+
static int bma400_init(struct bma400_data *data)
{
unsigned int val;
@@ -569,13 +589,12 @@ static int bma400_init(struct bma400_data *data)
ret = regmap_read(data->regmap, BMA400_CHIP_ID_REG, &val);
if (ret) {
dev_err(data->dev, "Failed to read chip id register\n");
- goto out;
+ return ret;
}
if (val != BMA400_ID_REG_VAL) {
dev_err(data->dev, "Chip ID mismatch\n");
- ret = -ENODEV;
- goto out;
+ return -ENODEV;
}
data->regulators[BMA400_VDD_REGULATOR].supply = "vdd";
@@ -589,27 +608,31 @@ static int bma400_init(struct bma400_data *data)
"Failed to get regulators: %d\n",
ret);
- goto out;
+ return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
data->regulators);
if (ret) {
dev_err(data->dev, "Failed to enable regulators: %d\n",
ret);
- goto out;
+ return ret;
}
+ ret = devm_add_action_or_reset(data->dev, bma400_regulators_disable, data);
+ if (ret)
+ return ret;
+
ret = bma400_get_power_mode(data);
if (ret) {
dev_err(data->dev, "Failed to get the initial power-mode\n");
- goto err_reg_disable;
+ return ret;
}
if (data->power_mode != POWER_MODE_NORMAL) {
ret = bma400_set_power_mode(data, POWER_MODE_NORMAL);
if (ret) {
dev_err(data->dev, "Failed to wake up the device\n");
- goto err_reg_disable;
+ return ret;
}
/*
* TODO: The datasheet waits 1500us here in the example, but
@@ -618,19 +641,23 @@ static int bma400_init(struct bma400_data *data)
usleep_range(1500, 2000);
}
+ ret = devm_add_action_or_reset(data->dev, bma400_power_disable, data);
+ if (ret)
+ return ret;
+
bma400_init_tables();
ret = bma400_get_accel_output_data_rate(data);
if (ret)
- goto err_reg_disable;
+ return ret;
ret = bma400_get_accel_oversampling_ratio(data);
if (ret)
- goto err_reg_disable;
+ return ret;
ret = bma400_get_accel_scale(data);
if (ret)
- goto err_reg_disable;
+ return ret;
/*
* Once the interrupt engine is supported we might use the
@@ -639,12 +666,6 @@ static int bma400_init(struct bma400_data *data)
* channel.
*/
return regmap_write(data->regmap, BMA400_ACC_CONFIG2_REG, 0x00);
-
-err_reg_disable:
- regulator_bulk_disable(ARRAY_SIZE(data->regulators),
- data->regulators);
-out:
- return ret;
}
static int bma400_read_raw(struct iio_dev *indio_dev,
@@ -822,32 +843,10 @@ int bma400_probe(struct device *dev, struct regmap *regmap, const char *name)
indio_dev->num_channels = ARRAY_SIZE(bma400_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
- dev_set_drvdata(dev, indio_dev);
-
- return iio_device_register(indio_dev);
+ return devm_iio_device_register(dev, indio_dev);
}
EXPORT_SYMBOL(bma400_probe);
-void bma400_remove(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct bma400_data *data = iio_priv(indio_dev);
- int ret;
-
- mutex_lock(&data->mutex);
- ret = bma400_set_power_mode(data, POWER_MODE_SLEEP);
- mutex_unlock(&data->mutex);
-
- if (ret)
- dev_warn(dev, "Failed to put device into sleep mode (%pe)\n", ERR_PTR(ret));
-
- regulator_bulk_disable(ARRAY_SIZE(data->regulators),
- data->regulators);
-
- iio_device_unregister(indio_dev);
-}
-EXPORT_SYMBOL(bma400_remove);
-
MODULE_AUTHOR("Dan Robertson <dan@...obertson.com>");
MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor core");
MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bma400_i2c.c b/drivers/iio/accel/bma400_i2c.c
index f50df5310beb..56da06537562 100644
--- a/drivers/iio/accel/bma400_i2c.c
+++ b/drivers/iio/accel/bma400_i2c.c
@@ -27,13 +27,6 @@ static int bma400_i2c_probe(struct i2c_client *client,
return bma400_probe(&client->dev, regmap, id->name);
}
-static int bma400_i2c_remove(struct i2c_client *client)
-{
- bma400_remove(&client->dev);
-
- return 0;
-}
-
static const struct i2c_device_id bma400_i2c_ids[] = {
{ "bma400", 0 },
{ }
@@ -52,7 +45,6 @@ static struct i2c_driver bma400_i2c_driver = {
.of_match_table = bma400_of_i2c_match,
},
.probe = bma400_i2c_probe,
- .remove = bma400_i2c_remove,
.id_table = bma400_i2c_ids,
};
diff --git a/drivers/iio/accel/bma400_spi.c b/drivers/iio/accel/bma400_spi.c
index 9f622e37477b..96dc9c215401 100644
--- a/drivers/iio/accel/bma400_spi.c
+++ b/drivers/iio/accel/bma400_spi.c
@@ -87,13 +87,6 @@ static int bma400_spi_probe(struct spi_device *spi)
return bma400_probe(&spi->dev, regmap, id->name);
}
-static int bma400_spi_remove(struct spi_device *spi)
-{
- bma400_remove(&spi->dev);
-
- return 0;
-}
-
static const struct spi_device_id bma400_spi_ids[] = {
{ "bma400", 0 },
{ }
@@ -112,7 +105,6 @@ static struct spi_driver bma400_spi_driver = {
.of_match_table = bma400_of_spi_match,
},
.probe = bma400_spi_probe,
- .remove = bma400_spi_remove,
.id_table = bma400_spi_ids,
};
--
2.17.1
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