On 05/12/14 19:54, Karol Wrona wrote: > This patch adds gyroscope iio driver which uses sensorhub as data > provider. > > Change-Id: Ia16bc92159d062a29957de8e62ea3fefdcd7985a > Signed-off-by: Karol Wrona <k.wrona@xxxxxxxxxxx> > Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> hmm. This is obviously very similar to the accelerometer driver so same comments (I haven't read it ;) > --- > drivers/iio/gyro/Makefile | 2 + > drivers/iio/gyro/ssp_gyro_sensor.c | 202 ++++++++++++++++++++++++++++++++++++ > 2 files changed, 204 insertions(+) > create mode 100644 drivers/iio/gyro/ssp_gyro_sensor.c > > diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile > index 36a3877..68f1437 100644 > --- a/drivers/iio/gyro/Makefile > +++ b/drivers/iio/gyro/Makefile > @@ -16,6 +16,8 @@ itg3200-y := itg3200_core.o > itg3200-$(CONFIG_IIO_BUFFER) += itg3200_buffer.o > obj-$(CONFIG_ITG3200) += itg3200.o > > +obj-$(CONFIG_IIO_SSP_SENSOR) += ssp_gyro_sensor.o > + > obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o > st_gyro-y := st_gyro_core.o > st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o > diff --git a/drivers/iio/gyro/ssp_gyro_sensor.c b/drivers/iio/gyro/ssp_gyro_sensor.c > new file mode 100644 > index 0000000..5820a43 > --- /dev/null > +++ b/drivers/iio/gyro/ssp_gyro_sensor.c > @@ -0,0 +1,202 @@ > +/* > + * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + */ > + > +#include <linux/iio/common/ssp_sensors.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/kfifo_buf.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include "../common/ssp_sensors/ssp_iio_sensor.h" > + > +#define SSP_CHANNEL_COUNT 3 > + > +#define SSP_GYROSCOPE_NAME "ssp-gyroscope" > +static const char ssp_gyro_name[] = SSP_GYROSCOPE_NAME; > + > +enum ssp_gyro_3d_channel { > + SSP_CHANNEL_SCAN_INDEX_X, > + SSP_CHANNEL_SCAN_INDEX_Y, > + SSP_CHANNEL_SCAN_INDEX_Z, > + SSP_CHANNEL_SCAN_INDEX_TIME, > + GYRO_3D_CHANNEL_MAX, > +}; > + > +static int ssp_gyro_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, int *val, > + int *val2, long mask) > +{ > + u32 t; > + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); > + > + switch (mask) { > + case IIO_CHAN_INFO_SAMP_FREQ: > + t = ssp_get_sensor_delay(data, SSP_GYROSCOPE_SENSOR); > + ssp_convert_to_freq(t, val, val2); > + return IIO_VAL_INT_PLUS_MICRO; > + default: > + break; > + } > + > + return -EINVAL; > +} > + > +static int ssp_gyro_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, int val, > + int val2, long mask) > +{ > + int ret; > + struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); > + > + switch (mask) { > + case IIO_CHAN_INFO_SAMP_FREQ: > + ret = ssp_convert_to_time(val, val2); > + ret = ssp_change_delay(data, SSP_GYROSCOPE_SENSOR, ret); > + if (ret < 0) > + dev_err(&indio_dev->dev, "gyro sensor enable fail\n"); > + > + return ret; > + default: > + break; > + } > + > + return -EINVAL; > +} > + > +static struct iio_info ssp_gyro_iio_info = { > + .read_raw = &ssp_gyro_read_raw, > + .write_raw = &ssp_gyro_write_raw, > +}; > + > +static const struct iio_chan_spec ssp_gyro_channels[] = { > + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X), > + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y), > + SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z), > + IIO_CHAN_SOFT_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME), > +}; > + > +static int ssp_process_gyro_data(struct iio_dev *indio_dev, void *buf, > + int64_t timestamp) > +{ > + __le32 time; > + const int len = SSP_GYROSCOPE_SIZE; > + int64_t calculated_time; > + char *data; > + int ret; > + > + if (indio_dev->scan_bytes == 0) > + return 0; > + > + data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + memcpy(data, buf, len); > + > + if (indio_dev->scan_timestamp) { > + memcpy(&time, &((char *)buf)[len], SSP_TIME_SIZE); > + calculated_time = > + timestamp + (int64_t)le32_to_cpu(time) * 1000000; > + } > + > + ret = iio_push_to_buffers_with_timestamp(indio_dev, data, > + calculated_time); > + > + kfree(data); > + > + return ret; > +} > + > +static const struct iio_buffer_setup_ops ssp_gyro_buffer_ops = { > + .postenable = &ssp_common_buffer_postenable, > + .predisable = &ssp_common_buffer_predisable, > +}; > + > +static int ssp_gyro_probe(struct platform_device *pdev) > +{ > + int ret; > + struct iio_dev *indio_dev; > + struct ssp_sensor_data *spd; > + > + indio_dev = iio_device_alloc(sizeof(*spd)); > + if (!indio_dev) > + return -ENOMEM; > + > + spd = iio_priv(indio_dev); > + > + spd->process_data = ssp_process_gyro_data; > + spd->type = SSP_GYROSCOPE_SENSOR; > + > + indio_dev->name = ssp_gyro_name; > + indio_dev->dev.parent = &pdev->dev; > + indio_dev->info = &ssp_gyro_iio_info; > + indio_dev->modes = INDIO_BUFFER_HARDWARE; > + indio_dev->channels = ssp_gyro_channels; > + indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels); > + > + ret = ssp_common_setup_buffer(indio_dev, &ssp_gyro_buffer_ops); > + if (ret < 0) { > + dev_err(&pdev->dev, "Buffer setup fail\n"); > + return ret; > + } > + > + platform_set_drvdata(pdev, indio_dev); > + > + ret = iio_device_register(indio_dev); > + if (ret < 0) { > + iio_buffer_unregister(indio_dev); > + iio_kfifo_free(indio_dev->buffer); > + return ret; > + }; > + > + /* similar to accel */ > + ssp_register_consumer(indio_dev, SSP_GYROSCOPE_SENSOR); > + > + return 0; > +} > + > +static int ssp_gyro_remove(struct platform_device *pdev) > +{ > + struct iio_dev *indio_dev = platform_get_drvdata(pdev); > + > + iio_device_unregister(indio_dev); > + iio_buffer_unregister(indio_dev); > + iio_kfifo_free(indio_dev->buffer); > + > + return 0; > +} > + > +static const struct of_device_id ssp_gyro_id_table[] = { > + { > + .compatible = "samsung,mpu6500-gyro", > + }, > + {}, > +}; > + > +static struct platform_driver ssp_gyro_driver = { > + .driver = { > + .owner = THIS_MODULE, > + .name = SSP_GYROSCOPE_NAME, > + .of_match_table = ssp_gyro_id_table, > + }, > + .probe = ssp_gyro_probe, > + .remove = ssp_gyro_remove, > +}; > + > +module_platform_driver(ssp_gyro_driver); > + > +MODULE_AUTHOR("Karol Wrona <k.wrona@xxxxxxxxxxx>"); > +MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver"); > +MODULE_LICENSE("GPL"); > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html