diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/iio/accel/st_accel_buffer.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | drivers/iio/accel/st_accel_buffer.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c new file mode 100644 index 000000000..7fddc137e --- /dev/null +++ b/drivers/iio/accel/st_accel_buffer.c @@ -0,0 +1,105 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_accel.h" + +int st_accel_trig_set_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + + return st_sensors_set_dataready_irq(indio_dev, state); +} + +static int st_accel_buffer_preenable(struct iio_dev *indio_dev) +{ + return st_sensors_set_enable(indio_dev, true); +} + +static int st_accel_buffer_postenable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (adata->buffer_data == NULL) { + err = -ENOMEM; + goto allocate_memory_error; + } + + err = st_sensors_set_axis_enable(indio_dev, + (u8)indio_dev->active_scan_mask[0]); + if (err < 0) + goto st_accel_buffer_postenable_error; + + err = iio_triggered_buffer_postenable(indio_dev); + if (err < 0) + goto st_accel_buffer_postenable_error; + + return err; + +st_accel_buffer_postenable_error: + kfree(adata->buffer_data); +allocate_memory_error: + return err; +} + +static int st_accel_buffer_predisable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + err = iio_triggered_buffer_predisable(indio_dev); + if (err < 0) + goto st_accel_buffer_predisable_error; + + err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); + if (err < 0) + goto st_accel_buffer_predisable_error; + + err = st_sensors_set_enable(indio_dev, false); + +st_accel_buffer_predisable_error: + kfree(adata->buffer_data); + return err; +} + +static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = { + .preenable = &st_accel_buffer_preenable, + .postenable = &st_accel_buffer_postenable, + .predisable = &st_accel_buffer_predisable, +}; + +int st_accel_allocate_ring(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, NULL, + &st_sensors_trigger_handler, &st_accel_buffer_setup_ops); +} + +void st_accel_deallocate_ring(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer"); +MODULE_LICENSE("GPL v2"); |