[PATCH v3 12/13] iio: core: Simplify the registration of kfifo buffers

Miquel Raynal
2022-02-07T14:59:06Z

Among all the users of the kfifo buffers, no one uses the
INDIO_BUFFER_HARDWARE mode. So let's take this as a general rule and
simplify a little bit the internals - overall the documentation - by
eliminating unused specific cases. Use the INDIO_BUFFER_SOFTWARE mode by
default with kfifo buffers, which will basically mimic what all the "non
direct" modes do.

Cc: Benson Leung <bleung@chromium.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jyoti Bhayana <jbhayana@google.com>
Cc: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
drivers/iio/accel/fxls8962af-core.c | 1 -
drivers/iio/accel/sca3000.c | 1 -
drivers/iio/accel/ssp_accel_sensor.c | 1 -
drivers/iio/adc/ina2xx-adc.c | 1 -
drivers/iio/adc/ti_am335x_adc.c | 4 +---
drivers/iio/buffer/kfifo_buf.c | 10 +---------
.../iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 3 +--
drivers/iio/common/scmi_sensors/scmi_iio.c | 1 -
drivers/iio/gyro/ssp_gyro_sensor.c | 1 -
drivers/iio/health/max30100.c | 1 -
drivers/iio/health/max30102.c | 1 -
drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c | 1 -
drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c | 1 -
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 1 -
drivers/iio/light/apds9960.c | 1 -
drivers/staging/iio/impedance-analyzer/ad5933.c | 1 -
include/linux/iio/kfifo_buf.h | 5 ++---
17 files changed, 5 insertions(+), 30 deletions(-)

diff --git a/drivers/iio/accel/fxls8962af-core.c b/drivers/iio/accel/fxls8962af-core.c
index 32989d91b982..cf494937a346 100644
--- a/drivers/iio/accel/fxls8962af-core.c
+++ b/drivers/iio/accel/fxls8962af-core.c
@@ -1209,7 +1209,6 @@ int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq)
return ret;

ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&fxls8962af_buffer_ops);
if (ret)
return ret;
diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index 43ecacbdc95a..13b467c74636 100644
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -1474,7 +1474,6 @@ static int sca3000_probe(struct spi_device *spi)
indio_dev->modes = INDIO_DIRECT_MODE;

ret = devm_iio_kfifo_buffer_setup(&spi->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&sca3000_ring_setup_ops);
if (ret)
return ret;
diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
index 04dcb2b657ee..d20f8d299c11 100644
--- a/drivers/iio/accel/ssp_accel_sensor.c
+++ b/drivers/iio/accel/ssp_accel_sensor.c
@@ -113,7 +113,6 @@ static int ssp_accel_probe(struct platform_device *pdev)
indio_dev->available_scan_masks = ssp_accel_scan_mask;

ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&ssp_accel_buffer_ops);
if (ret)
return ret;
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index 4f9992a51e64..05fdfd06e3b0 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -1027,7 +1027,6 @@ static int ina2xx_probe(struct i2c_client *client,
indio_dev->name = id->name;

ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&ina2xx_setup_ops);
if (ret)
return ret;
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index dbdc1ef48566..567d43a30955 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -376,9 +376,7 @@ static int tiadc_iio_buffered_hardware_setup(struct device *dev,
{
int ret;

- ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
- setup_ops);
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev, setup_ops);
if (ret)
return ret;

diff --git a/drivers/iio/buffer/kfifo_buf.c b/drivers/iio/buffer/kfifo_buf.c
index 416d35a61ae2..35d8b4077376 100644
--- a/drivers/iio/buffer/kfifo_buf.c
+++ b/drivers/iio/buffer/kfifo_buf.c
@@ -259,8 +259,6 @@ static struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev)
* devm_iio_kfifo_buffer_setup_ext - Allocate a kfifo buffer & attach it to an IIO device
* @dev: Device object to which to attach the life-time of this kfifo buffer
* @indio_dev: The device the buffer should be attached to
- * @mode_flags: The mode flags for this buffer (INDIO_BUFFER_SOFTWARE and/or
- * INDIO_BUFFER_TRIGGERED).
* @setup_ops: The setup_ops required to configure the HW part of the buffer (optional)
* @buffer_attrs: Extra sysfs buffer attributes for this IIO buffer
*
@@ -271,22 +269,16 @@ static struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev)
*/
int devm_iio_kfifo_buffer_setup_ext(struct device *dev,
struct iio_dev *indio_dev,
- int mode_flags,
const struct iio_buffer_setup_ops *setup_ops,
const struct attribute **buffer_attrs)
{
struct iio_buffer *buffer;

- if (!mode_flags)
- return -EINVAL;
-
buffer = devm_iio_kfifo_allocate(dev);
if (!buffer)
return -ENOMEM;

- mode_flags &= kfifo_access_funcs.modes;
-
- indio_dev->modes |= mode_flags;
+ indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
indio_dev->setup_ops = setup_ops;

buffer->attrs = buffer_attrs;
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index b2725c6adc7f..a4cf1d9a8a49 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -333,8 +333,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
* We can not use trigger here, as events are generated
* as soon as sample_frequency is set.
*/
- ret = devm_iio_kfifo_buffer_setup_ext(dev, indio_dev,
- INDIO_BUFFER_SOFTWARE, NULL,
+ ret = devm_iio_kfifo_buffer_setup_ext(dev, indio_dev, NULL,
cros_ec_sensor_fifo_attributes);
if (ret)
return ret;
diff --git a/drivers/iio/common/scmi_sensors/scmi_iio.c b/drivers/iio/common/scmi_sensors/scmi_iio.c
index d538bf3ab1ef..793d628db55f 100644
--- a/drivers/iio/common/scmi_sensors/scmi_iio.c
+++ b/drivers/iio/common/scmi_sensors/scmi_iio.c
@@ -686,7 +686,6 @@ static int scmi_iio_dev_probe(struct scmi_device *sdev)

err = devm_iio_kfifo_buffer_setup(&scmi_iio_dev->dev,
scmi_iio_dev,
- INDIO_BUFFER_SOFTWARE,
&scmi_iio_buffer_ops);
if (err < 0) {
dev_err(dev,
diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c
index 46ed12771d2f..eebc036717af 100644
--- a/drivers/iio/gyro/ssp_gyro_sensor.c
+++ b/drivers/iio/gyro/ssp_gyro_sensor.c
@@ -113,7 +113,6 @@ static int ssp_gyro_probe(struct platform_device *pdev)
indio_dev->available_scan_masks = ssp_gyro_scan_mask;

ret = devm_iio_kfifo_buffer_setup(&pdev->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&ssp_gyro_buffer_ops);
if (ret)
return ret;
diff --git a/drivers/iio/health/max30100.c b/drivers/iio/health/max30100.c
index 36ba7611d9ce..ad5717965223 100644
--- a/drivers/iio/health/max30100.c
+++ b/drivers/iio/health/max30100.c
@@ -433,7 +433,6 @@ static int max30100_probe(struct i2c_client *client,
indio_dev->modes = INDIO_DIRECT_MODE;

ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&max30100_buffer_setup_ops);
if (ret)
return ret;
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index 2292876c55e2..abbcef563807 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -542,7 +542,6 @@ static int max30102_probe(struct i2c_client *client,
}

ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&max30102_buffer_setup_ops);
if (ret)
return ret;
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
index 383cc3250342..c3f433ad3af6 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
@@ -731,7 +731,6 @@ struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st)
indio_dev->available_scan_masks = inv_icm42600_accel_scan_masks;

ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&inv_icm42600_buffer_ops);
if (ret)
return ERR_PTR(ret);
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
index cec1dd0e0464..9d94a8518e3c 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
@@ -743,7 +743,6 @@ struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st)
indio_dev->setup_ops = &inv_icm42600_buffer_ops;

ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&inv_icm42600_buffer_ops);
if (ret)
return ERR_PTR(ret);
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index 16730a780964..f80c62849d30 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -746,7 +746,6 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
continue;

ret = devm_iio_kfifo_buffer_setup(hw->dev, hw->iio_devs[i],
- INDIO_BUFFER_SOFTWARE,
&st_lsm6dsx_buffer_ops);
if (ret)
return ret;
diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
index 4141c0fa7bc4..09b831f9f40b 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -1003,7 +1003,6 @@ static int apds9960_probe(struct i2c_client *client,
indio_dev->modes = INDIO_DIRECT_MODE;

ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&apds9960_buffer_setup_ops);
if (ret)
return ret;
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 793918e1c45f..f177b20f0f2d 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -749,7 +749,6 @@ static int ad5933_probe(struct i2c_client *client,
indio_dev->num_channels = ARRAY_SIZE(ad5933_channels);

ret = devm_iio_kfifo_buffer_setup(&client->dev, indio_dev,
- INDIO_BUFFER_SOFTWARE,
&ad5933_ring_setup_ops);
if (ret)
return ret;
diff --git a/include/linux/iio/kfifo_buf.h b/include/linux/iio/kfifo_buf.h
index ccd2ceae7b25..8a83fb58232d 100644
--- a/include/linux/iio/kfifo_buf.h
+++ b/include/linux/iio/kfifo_buf.h
@@ -12,11 +12,10 @@ void iio_kfifo_free(struct iio_buffer *r);

int devm_iio_kfifo_buffer_setup_ext(struct device *dev,
struct iio_dev *indio_dev,
- int mode_flags,
const struct iio_buffer_setup_ops *setup_ops,
const struct attribute **buffer_attrs);

-#define devm_iio_kfifo_buffer_setup(dev, indio_dev, mode_flags, setup_ops) \
- devm_iio_kfifo_buffer_setup_ext((dev), (indio_dev), (mode_flags), (setup_ops), NULL)
+#define devm_iio_kfifo_buffer_setup(dev, indio_dev, setup_ops) \
+ devm_iio_kfifo_buffer_setup_ext((dev), (indio_dev), (setup_ops), NULL)

#endif
--
2.27.0