diff options
Diffstat (limited to 'drivers/staging/iio/gyro/adis16080_core.c')
| -rw-r--r-- | drivers/staging/iio/gyro/adis16080_core.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c deleted file mode 100644 index a73902573f79..000000000000 --- a/drivers/staging/iio/gyro/adis16080_core.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * ADIS16080/100 Yaw Rate Gyroscope with SPI driver - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ -#include <linux/delay.h> -#include <linux/mutex.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> -#include <linux/sysfs.h> -#include <linux/module.h> - -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> - -#define ADIS16080_DIN_GYRO (0 << 10) /* Gyroscope output */ -#define ADIS16080_DIN_TEMP (1 << 10) /* Temperature output */ -#define ADIS16080_DIN_AIN1 (2 << 10) -#define ADIS16080_DIN_AIN2 (3 << 10) - -/* - * 1: Write contents on DIN to control register. - * 0: No changes to control register. - */ - -#define ADIS16080_DIN_WRITE (1 << 15) - -/** - * struct adis16080_state - device instance specific data - * @us: actual spi_device to write data - * @buf: transmit or receive buffer - * @buf_lock: mutex to protect tx and rx - **/ -struct adis16080_state { - struct spi_device *us; - struct mutex buf_lock; - - u8 buf[2] ____cacheline_aligned; -}; - -static int adis16080_spi_write(struct iio_dev *indio_dev, - u16 val) -{ - int ret; - struct adis16080_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - st->buf[0] = val >> 8; - st->buf[1] = val; - - ret = spi_write(st->us, st->buf, 2); - mutex_unlock(&st->buf_lock); - - return ret; -} - -static int adis16080_spi_read(struct iio_dev *indio_dev, - u16 *val) -{ - int ret; - struct adis16080_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - - ret = spi_read(st->us, st->buf, 2); - - if (ret == 0) - *val = ((st->buf[0] & 0xF) << 8) | st->buf[1]; - mutex_unlock(&st->buf_lock); - - return ret; -} - -static int adis16080_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long mask) -{ - int ret = -EINVAL; - u16 ut = 0; - /* Take the iio_dev status lock */ - - mutex_lock(&indio_dev->mlock); - switch (mask) { - case IIO_CHAN_INFO_RAW: - ret = adis16080_spi_write(indio_dev, - chan->address | - ADIS16080_DIN_WRITE); - if (ret < 0) - break; - ret = adis16080_spi_read(indio_dev, &ut); - if (ret < 0) - break; - *val = ut; - ret = IIO_VAL_INT; - break; - } - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static const struct iio_chan_spec adis16080_channels[] = { - { - .type = IIO_ANGL_VEL, - .modified = 1, - .channel2 = IIO_MOD_Z, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, - .address = ADIS16080_DIN_GYRO, - }, { - .type = IIO_VOLTAGE, - .indexed = 1, - .channel = 0, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, - .address = ADIS16080_DIN_AIN1, - }, { - .type = IIO_VOLTAGE, - .indexed = 1, - .channel = 1, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, - .address = ADIS16080_DIN_AIN2, - }, { - .type = IIO_TEMP, - .indexed = 1, - .channel = 0, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, - .address = ADIS16080_DIN_TEMP, - } -}; - -static const struct iio_info adis16080_info = { - .read_raw = &adis16080_read_raw, - .driver_module = THIS_MODULE, -}; - -static int __devinit adis16080_probe(struct spi_device *spi) -{ - int ret; - struct adis16080_state *st; - struct iio_dev *indio_dev; - - /* setup the industrialio driver allocated elements */ - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - st = iio_priv(indio_dev); - /* this is only used for removal purposes */ - spi_set_drvdata(spi, indio_dev); - - /* Allocate the comms buffers */ - st->us = spi; - mutex_init(&st->buf_lock); - - indio_dev->name = spi->dev.driver->name; - indio_dev->channels = adis16080_channels; - indio_dev->num_channels = ARRAY_SIZE(adis16080_channels); - indio_dev->dev.parent = &spi->dev; - indio_dev->info = &adis16080_info; - indio_dev->modes = INDIO_DIRECT_MODE; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_free_dev; - return 0; - -error_free_dev: - iio_device_free(indio_dev); -error_ret: - return ret; -} - -/* fixme, confirm ordering in this function */ -static int __devexit adis16080_remove(struct spi_device *spi) -{ - iio_device_unregister(spi_get_drvdata(spi)); - iio_device_free(spi_get_drvdata(spi)); - - return 0; -} - -static struct spi_driver adis16080_driver = { - .driver = { - .name = "adis16080", - .owner = THIS_MODULE, - }, - .probe = adis16080_probe, - .remove = __devexit_p(adis16080_remove), -}; -module_spi_driver(adis16080_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope Driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:adis16080"); |