[PATCH 2/3] iio: make use of iio_device_attach_kfifo_buffer() where straightforward

Alexandru Ardelean
2020-04-01T13:00:48Z

All drivers that already call devm_iio_kfifo_allocate() &
iio_device_attach_buffer() are simple to convert to
iio_device_attach_kfifo_buffer() in a single go/patch/.

This change does that.

For drivers max30100 & max30102 this helper is called after indio_dev has
been populated. This doesn't make any difference [at this point in time].

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/iio/accel/sca3000.c | 18 ++----------------
drivers/iio/accel/ssp_accel_sensor.c | 13 ++++---------
drivers/iio/adc/ina2xx-adc.c | 13 +++++--------
drivers/iio/gyro/ssp_gyro_sensor.c | 13 ++++---------
drivers/iio/health/max30100.c | 15 ++++++---------
drivers/iio/health/max30102.c | 15 ++++++---------
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 17 +++++++----------
drivers/iio/light/acpi-als.c | 11 +++++------
drivers/iio/light/apds9960.c | 15 ++++++---------
9 files changed, 45 insertions(+), 85 deletions(-)

diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index 66d768d971e1..a0db76082ba6 100644
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -1272,20 +1272,6 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev,
return ret;
}

-static int sca3000_configure_ring(struct iio_dev *indio_dev)
-{
- struct iio_buffer *buffer;
-
- buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
- indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
-
- return 0;
-}
-
static inline
int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
{
@@ -1480,7 +1466,8 @@ static int sca3000_probe(struct spi_device *spi)
}
indio_dev->modes = INDIO_DIRECT_MODE;

- ret = sca3000_configure_ring(indio_dev);
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &sca3000_ring_setup_ops);
if (ret)
return ret;

@@ -1494,7 +1481,6 @@ static int sca3000_probe(struct spi_device *spi)
if (ret)
return ret;
}
- indio_dev->setup_ops = &sca3000_ring_setup_ops;
ret = sca3000_clean_setup(st);
if (ret)
goto error_free_irq;
diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
index c32647abce20..1d9971db949d 100644
--- a/drivers/iio/accel/ssp_accel_sensor.c
+++ b/drivers/iio/accel/ssp_accel_sensor.c
@@ -96,7 +96,6 @@ static int ssp_accel_probe(struct platform_device *pdev)
int ret;
struct iio_dev *indio_dev;
struct ssp_sensor_data *spd;
- struct iio_buffer *buffer;

indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
if (!indio_dev)
@@ -111,18 +110,14 @@ static int ssp_accel_probe(struct platform_device *pdev)
indio_dev->dev.parent = &pdev->dev;
indio_dev->dev.of_node = pdev->dev.of_node;
indio_dev->info = &ssp_accel_iio_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = ssp_acc_channels;
indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
indio_dev->available_scan_masks = ssp_accel_scan_mask;

- buffer = devm_iio_kfifo_allocate(&pdev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- indio_dev->setup_ops = &ssp_accel_buffer_ops;
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &ssp_accel_buffer_ops);
+ if (ret)
+ return ret;

platform_set_drvdata(pdev, indio_dev);

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index bdd7cba6f6b0..2070809e1acc 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -950,7 +950,6 @@ static int ina2xx_probe(struct i2c_client *client,
{
struct ina2xx_chip_info *chip;
struct iio_dev *indio_dev;
- struct iio_buffer *buffer;
unsigned int val;
enum ina2xx_ids type;
int ret;
@@ -1014,7 +1013,7 @@ static int ina2xx_probe(struct i2c_client *client,
return ret;
}

- indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->dev.parent = &client->dev;
indio_dev->dev.of_node = client->dev.of_node;
if (id->driver_data == ina226) {
@@ -1027,13 +1026,11 @@ static int ina2xx_probe(struct i2c_client *client,
indio_dev->info = &ina219_info;
}
indio_dev->name = id->name;
- indio_dev->setup_ops = &ina2xx_setup_ops;

- buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &ina2xx_setup_ops);
+ if (ret)
+ return ret;

return iio_device_register(indio_dev);
}
diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c
index 4e4ee4167544..c12d3db5a951 100644
--- a/drivers/iio/gyro/ssp_gyro_sensor.c
+++ b/drivers/iio/gyro/ssp_gyro_sensor.c
@@ -96,7 +96,6 @@ static int ssp_gyro_probe(struct platform_device *pdev)
int ret;
struct iio_dev *indio_dev;
struct ssp_sensor_data *spd;
- struct iio_buffer *buffer;

indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
if (!indio_dev)
@@ -110,18 +109,14 @@ static int ssp_gyro_probe(struct platform_device *pdev)
indio_dev->name = ssp_gyro_name;
indio_dev->dev.parent = &pdev->dev;
indio_dev->info = &ssp_gyro_iio_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = ssp_gyro_channels;
indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
indio_dev->available_scan_masks = ssp_gyro_scan_mask;

- buffer = devm_iio_kfifo_allocate(&pdev->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- indio_dev->setup_ops = &ssp_gyro_buffer_ops;
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &ssp_gyro_buffer_ops);
+ if (ret)
+ return ret;

platform_set_drvdata(pdev, indio_dev);

diff --git a/drivers/iio/health/max30100.c b/drivers/iio/health/max30100.c
index 546fc37ad75d..f4e9866f4c3d 100644
--- a/drivers/iio/health/max30100.c
+++ b/drivers/iio/health/max30100.c
@@ -418,7 +418,6 @@ static int max30100_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max30100_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;

@@ -426,21 +425,19 @@ static int max30100_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->name = MAX30100_DRV_NAME;
indio_dev->channels = max30100_channels;
indio_dev->info = &max30100_info;
indio_dev->num_channels = ARRAY_SIZE(max30100_channels);
indio_dev->available_scan_masks = max30100_scan_masks;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &max30100_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->dev.parent = &client->dev;

+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &max30100_buffer_setup_ops);
+ if (ret)
+ return ret;
+
data = iio_priv(indio_dev);
data->indio_dev = indio_dev;
data->client = client;
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index 74fc260b957e..e15126d23dfb 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -507,7 +507,6 @@ static int max30102_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max30102_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;
unsigned int reg;
@@ -516,16 +515,9 @@ static int max30102_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->name = MAX30102_DRV_NAME;
indio_dev->info = &max30102_info;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &max30102_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->dev.parent = &client->dev;

data = iio_priv(indio_dev);
@@ -551,6 +543,11 @@ static int max30102_probe(struct i2c_client *client,
return -ENODEV;
}

+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &max30102_buffer_setup_ops);
+ if (ret)
+ return ret;
+
data->regmap = devm_regmap_init_i2c(client, &max30102_regmap_config);
if (IS_ERR(data->regmap)) {
dev_err(&client->dev, "regmap initialization failed\n");
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index bb899345f2bb..4ba3d5551570 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -30,8 +30,8 @@
* Denis Ciocca <denis.ciocca@st.com>
*/
#include <linux/module.h>
-#include <linux/iio/kfifo_buf.h>
#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
#include <linux/iio/buffer.h>
#include <linux/regmap.h>
#include <linux/bitfield.h>
@@ -713,20 +713,17 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {

int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
{
- struct iio_buffer *buffer;
- int i;
+ int i, ret;

for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
if (!hw->iio_devs[i])
continue;

- buffer = devm_iio_kfifo_allocate(hw->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(hw->iio_devs[i], buffer);
- hw->iio_devs[i]->modes |= INDIO_BUFFER_SOFTWARE;
- hw->iio_devs[i]->setup_ops = &st_lsm6dsx_buffer_ops;
+ ret = iio_device_attach_kfifo_buffer(hw->iio_devs[i],
+ INDIO_BUFFER_SOFTWARE,
+ &st_lsm6dsx_buffer_ops);
+ if (ret)
+ return ret;
}

return 0;
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
index 1eafd0b24e18..ea99705c3387 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -166,6 +166,7 @@ static int acpi_als_add(struct acpi_device *device)
struct acpi_als *als;
struct iio_dev *indio_dev;
struct iio_buffer *buffer;
+ int ret;

indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
if (!indio_dev)
@@ -180,15 +181,13 @@ static int acpi_als_add(struct acpi_device *device)
indio_dev->name = ACPI_ALS_DEVICE_NAME;
indio_dev->dev.parent = &device->dev;
indio_dev->info = &acpi_als_info;
- indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = acpi_als_channels;
indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);

- buffer = devm_iio_kfifo_allocate(&device->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ NULL);
+ if (ret)
+ return ret;

return devm_iio_device_register(&device->dev, indio_dev);
}
diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
index 52f86bc777dd..8acc319445b6 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -987,7 +987,6 @@ static int apds9960_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct apds9960_data *data;
- struct iio_buffer *buffer;
struct iio_dev *indio_dev;
int ret;

@@ -995,20 +994,18 @@ static int apds9960_probe(struct i2c_client *client,
if (!indio_dev)
return -ENOMEM;

- buffer = devm_iio_kfifo_allocate(&client->dev);
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
indio_dev->dev.parent = &client->dev;
indio_dev->info = &apds9960_info;
indio_dev->name = APDS9960_DRV_NAME;
indio_dev->channels = apds9960_channels;
indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
indio_dev->available_scan_masks = apds9960_scan_masks;
- indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
- indio_dev->setup_ops = &apds9960_buffer_setup_ops;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_device_attach_kfifo_buffer(indio_dev, INDIO_BUFFER_SOFTWARE,
+ &apds9960_buffer_setup_ops);
+ if (ret)
+ return ret;

data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
--
2.17.1