[PATCH 4/4] iio: st_sensors: remove reference to parent device object on st_sensor_data

From: Alexandru Ardelean
Date: Mon Jul 26 2021 - 03:14:25 EST

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I'm not completely sure whether this change makes much sense.
The idea behind it, is that all devm_ calls in ST sensors are bound to the
parent device object.

However, the reference to that object is kept on both the st_sensor_data
struct and the IIO object parent (indio_dev->dev.parent).

This change only adds a bit consistency and uses the reference stored on
indio_dev->dev.parent, to enforce the assumption that all ST sensors' devm_
calls are bound to the same reference as the one store on st_sensor_data.

Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx>
---
drivers/iio/accel/st_accel_core.c | 7 ++++---
drivers/iio/common/st_sensors/st_sensors_i2c.c | 1 -
drivers/iio/common/st_sensors/st_sensors_spi.c | 1 -
drivers/iio/common/st_sensors/st_sensors_trigger.c | 8 +++++---
drivers/iio/gyro/st_gyro_core.c | 2 +-
drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c | 2 --
drivers/iio/magnetometer/st_magn_core.c | 4 ++--
drivers/iio/pressure/st_pressure_core.c | 2 +-
include/linux/iio/common/st_sensors.h | 2 --
9 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
index 01695abd9d2f..c2d2cbe0fa3b 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -1186,6 +1186,7 @@ static const struct iio_trigger_ops st_accel_trigger_ops = {
*/
static int apply_acpi_orientation(struct iio_dev *indio_dev)
{
+ struct device *parent = indio_dev->dev.parent;
struct st_sensor_data *adata = iio_priv(indio_dev);
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_device *adev;
@@ -1210,7 +1211,7 @@ static int apply_acpi_orientation(struct iio_dev *indio_dev)
};

- adev = ACPI_COMPANION(adata->dev);
+ adev = ACPI_COMPANION(parent);
if (!adev)
return 0;

@@ -1334,8 +1335,8 @@ EXPORT_SYMBOL(st_accel_get_settings);
int st_accel_common_probe(struct iio_dev *indio_dev)
{
struct st_sensor_data *adata = iio_priv(indio_dev);
- struct st_sensors_platform_data *pdata = dev_get_platdata(adata->dev);
struct device *parent = indio_dev->dev.parent;
+ struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
int err;

indio_dev->modes = INDIO_DIRECT_MODE;
@@ -1355,7 +1356,7 @@ int st_accel_common_probe(struct iio_dev *indio_dev)
*/
err = apply_acpi_orientation(indio_dev);
if (err) {
- err = iio_read_mount_matrix(adata->dev, &adata->mount_matrix);
+ err = iio_read_mount_matrix(parent, &adata->mount_matrix);
if (err)
return err;
}
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
index b3ff88700866..18bd3c3d99bc 100644
--- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
+++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
@@ -57,7 +57,6 @@ int st_sensors_i2c_configure(struct iio_dev *indio_dev,

indio_dev->name = client->name;

- sdata->dev = &client->dev;
sdata->irq = client->irq;

return 0;
diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c
index 0d1d66c77cd8..7c60050e90dc 100644
--- a/drivers/iio/common/st_sensors/st_sensors_spi.c
+++ b/drivers/iio/common/st_sensors/st_sensors_spi.c
@@ -109,7 +109,6 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev,

indio_dev->name = spi->modalias;

- sdata->dev = &spi->dev;
sdata->irq = spi->irq;

return 0;
diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c b/drivers/iio/common/st_sensors/st_sensors_trigger.c
index d022157b66a2..bb687d1bcbef 100644
--- a/drivers/iio/common/st_sensors/st_sensors_trigger.c
+++ b/drivers/iio/common/st_sensors/st_sensors_trigger.c
@@ -28,6 +28,7 @@
static bool st_sensors_new_samples_available(struct iio_dev *indio_dev,
struct st_sensor_data *sdata)
{
+ struct device *parent = indio_dev->dev.parent;
int ret, status;

/* How would I know if I can't check it? */
@@ -42,7 +43,7 @@ static bool st_sensors_new_samples_available(struct iio_dev *indio_dev,
sdata->sensor_settings->drdy_irq.stat_drdy.addr,
&status);
if (ret < 0) {
- dev_err(sdata->dev, "error checking samples available\n");
+ dev_err(parent, "error checking samples available\n");
return false;
}

@@ -75,6 +76,7 @@ static irqreturn_t st_sensors_irq_thread(int irq, void *p)
struct iio_trigger *trig = p;
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
struct st_sensor_data *sdata = iio_priv(indio_dev);
+ struct device *parent = indio_dev->dev.parent;

/*
* If this trigger is backed by a hardware interrupt and we have a
@@ -87,7 +89,7 @@ static irqreturn_t st_sensors_irq_thread(int irq, void *p)
st_sensors_new_samples_available(indio_dev, sdata)) {
iio_trigger_poll_chained(p);
} else {
- dev_dbg(sdata->dev, "spurious IRQ\n");
+ dev_dbg(parent, "spurious IRQ\n");
return IRQ_NONE;
}

@@ -107,7 +109,7 @@ static irqreturn_t st_sensors_irq_thread(int irq, void *p)
*/
while (sdata->hw_irq_trigger &&
st_sensors_new_samples_available(indio_dev, sdata)) {
- dev_dbg(sdata->dev, "more samples came in during polling\n");
+ dev_dbg(parent, "more samples came in during polling\n");
sdata->hw_timestamp = iio_get_time_ns(indio_dev);
iio_trigger_poll_chained(p);
}
diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
index 3609082a6778..201050b76fe5 100644
--- a/drivers/iio/gyro/st_gyro_core.c
+++ b/drivers/iio/gyro/st_gyro_core.c
@@ -492,7 +492,7 @@ int st_gyro_common_probe(struct iio_dev *indio_dev)
indio_dev->channels = gdata->sensor_settings->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;

- err = iio_read_mount_matrix(gdata->dev, &gdata->mount_matrix);
+ err = iio_read_mount_matrix(parent, &gdata->mount_matrix);
if (err)
return err;

diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
index d276f663fe57..b3a43a3b04ff 100644
--- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
+++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_core.c
@@ -90,7 +90,6 @@ static int st_lsm9ds0_probe_accel(struct st_lsm9ds0 *lsm9ds0, struct regmap *reg

data = iio_priv(lsm9ds0->accel);
data->sensor_settings = (struct st_sensor_settings *)settings;
- data->dev = dev;
data->irq = lsm9ds0->irq;
data->regmap = regmap;
data->vdd = lsm9ds0->vdd;
@@ -119,7 +118,6 @@ static int st_lsm9ds0_probe_magn(struct st_lsm9ds0 *lsm9ds0, struct regmap *regm

data = iio_priv(lsm9ds0->magn);
data->sensor_settings = (struct st_sensor_settings *)settings;
- data->dev = dev;
data->irq = lsm9ds0->irq;
data->regmap = regmap;
data->vdd = lsm9ds0->vdd;
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 1458906a3765..0806a1e65ce4 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -611,8 +611,8 @@ EXPORT_SYMBOL(st_magn_get_settings);
int st_magn_common_probe(struct iio_dev *indio_dev)
{
struct st_sensor_data *mdata = iio_priv(indio_dev);
- struct st_sensors_platform_data *pdata = dev_get_platdata(mdata->dev);
struct device *parent = indio_dev->dev.parent;
+ struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
int err;

indio_dev->modes = INDIO_DIRECT_MODE;
@@ -626,7 +626,7 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
indio_dev->channels = mdata->sensor_settings->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;

- err = iio_read_mount_matrix(mdata->dev, &mdata->mount_matrix);
+ err = iio_read_mount_matrix(parent, &mdata->mount_matrix);
if (err)
return err;

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index cebcc1d93d0b..26a1ee43d56e 100644
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -677,8 +677,8 @@ EXPORT_SYMBOL(st_press_get_settings);
int st_press_common_probe(struct iio_dev *indio_dev)
{
struct st_sensor_data *press_data = iio_priv(indio_dev);
- struct st_sensors_platform_data *pdata = dev_get_platdata(press_data->dev);
struct device *parent = indio_dev->dev.parent;
+ struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
int err;

indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
index d17ae1e5ca19..22f67845cdd3 100644
--- a/include/linux/iio/common/st_sensors.h
+++ b/include/linux/iio/common/st_sensors.h
@@ -220,7 +220,6 @@ struct st_sensor_settings {

/**
* struct st_sensor_data - ST sensor device status
- * @dev: Pointer to instance of struct device (I2C or SPI).
* @trig: The trigger in use by the core driver.
* @mount_matrix: The mounting matrix of the sensor.
* @sensor_settings: Pointer to the specific sensor settings in use.
@@ -240,7 +239,6 @@ struct st_sensor_settings {
* @buffer_data: Data used by buffer part.
*/
struct st_sensor_data {
- struct device *dev;
struct iio_trigger *trig;
struct iio_mount_matrix mount_matrix;
struct st_sensor_settings *sensor_settings;
--
2.31.1

Next message: David Hildenbrand: "Re: mmotm 2021-07-23-15-03 uploaded (mm/memory_hotplug.c)"
Previous message: Alexandru Ardelean: "[PATCH 3/4] iio: st_sensors: remove all driver remove functions"
In reply to: Andy Shevchenko: "Re: [PATCH 3/4] iio: st_sensors: remove all driver remove functions"
Next in thread: Jonathan Cameron: "Re: [PATCH 0/4] iio: st_sensors: convert probe functions to full devm"
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