diff options
Diffstat (limited to 'drivers/staging/iio/gyro/adis16060_core.c')
| -rw-r--r-- | drivers/staging/iio/gyro/adis16060_core.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c deleted file mode 100644 index 4e7630caf7d3..000000000000 --- a/drivers/staging/iio/gyro/adis16060_core.c +++ /dev/null @@ -1,234 +0,0 @@ -/* - * ADIS16060 Wide Bandwidth Yaw Rate Gyroscope with SPI driver - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/module.h> -#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/iio/iio.h> -#include <linux/iio/sysfs.h> - -#define ADIS16060_GYRO 0x20 /* Measure Angular Rate (Gyro) */ -#define ADIS16060_TEMP_OUT 0x10 /* Measure Temperature */ -#define ADIS16060_AIN2 0x80 /* Measure AIN2 */ -#define ADIS16060_AIN1 0x40 /* Measure AIN1 */ - -/** - * struct adis16060_state - device instance specific data - * @us_w: actual spi_device to write config - * @us_r: actual spi_device to read back data - * @buf: transmit or receive buffer - * @buf_lock: mutex to protect tx and rx - **/ -struct adis16060_state { - struct spi_device *us_w; - struct spi_device *us_r; - struct mutex buf_lock; - - u8 buf[3] ____cacheline_aligned; -}; - -static struct iio_dev *adis16060_iio_dev; - -static int adis16060_spi_write_then_read(struct iio_dev *indio_dev, - u8 conf, u16 *val) -{ - int ret; - struct adis16060_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - st->buf[2] = conf; /* The last 8 bits clocked in are latched */ - ret = spi_write(st->us_w, st->buf, 3); - - if (ret < 0) { - mutex_unlock(&st->buf_lock); - return ret; - } - - ret = spi_read(st->us_r, st->buf, 3); - - /* The internal successive approximation ADC begins the - * conversion process on the falling edge of MSEL1 and - * starts to place data MSB first on the DOUT line at - * the 6th falling edge of SCLK - */ - if (!ret) - *val = ((st->buf[0] & 0x3) << 12) | - (st->buf[1] << 4) | - ((st->buf[2] >> 4) & 0xF); - mutex_unlock(&st->buf_lock); - - return ret; -} - -static int adis16060_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, - long mask) -{ - u16 tval = 0; - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - ret = adis16060_spi_write_then_read(indio_dev, - chan->address, &tval); - if (ret < 0) - return ret; - - *val = tval; - return IIO_VAL_INT; - case IIO_CHAN_INFO_OFFSET: - *val = -7; - *val2 = 461117; - return IIO_VAL_INT_PLUS_MICRO; - case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = 34000; - return IIO_VAL_INT_PLUS_MICRO; - } - - return -EINVAL; -} - -static const struct iio_info adis16060_info = { - .read_raw = adis16060_read_raw, -}; - -static const struct iio_chan_spec adis16060_channels[] = { - { - .type = IIO_ANGL_VEL, - .modified = 1, - .channel2 = IIO_MOD_Z, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .address = ADIS16060_GYRO, - }, { - .type = IIO_VOLTAGE, - .indexed = 1, - .channel = 0, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .address = ADIS16060_AIN1, - }, { - .type = IIO_VOLTAGE, - .indexed = 1, - .channel = 1, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .address = ADIS16060_AIN2, - }, { - .type = IIO_TEMP, - .indexed = 1, - .channel = 0, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE), - .address = ADIS16060_TEMP_OUT, - } -}; - -static int adis16060_r_probe(struct spi_device *spi) -{ - int ret; - struct adis16060_state *st; - struct iio_dev *indio_dev; - - /* setup the industrialio driver allocated elements */ - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); - if (!indio_dev) - return -ENOMEM; - /* this is only used for removal purposes */ - spi_set_drvdata(spi, indio_dev); - st = iio_priv(indio_dev); - st->us_r = spi; - mutex_init(&st->buf_lock); - - indio_dev->name = spi->dev.driver->name; - indio_dev->dev.parent = &spi->dev; - indio_dev->info = &adis16060_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = adis16060_channels; - indio_dev->num_channels = ARRAY_SIZE(adis16060_channels); - - ret = devm_iio_device_register(&spi->dev, indio_dev); - if (ret) - return ret; - - adis16060_iio_dev = indio_dev; - return 0; -} - -static int adis16060_w_probe(struct spi_device *spi) -{ - int ret; - struct iio_dev *indio_dev = adis16060_iio_dev; - struct adis16060_state *st; - - if (!indio_dev) { - ret = -ENODEV; - goto error_ret; - } - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - st->us_w = spi; - return 0; - -error_ret: - return ret; -} - -static int adis16060_w_remove(struct spi_device *spi) -{ - return 0; -} - -static struct spi_driver adis16060_r_driver = { - .driver = { - .name = "adis16060_r", - }, - .probe = adis16060_r_probe, -}; - -static struct spi_driver adis16060_w_driver = { - .driver = { - .name = "adis16060_w", - }, - .probe = adis16060_w_probe, - .remove = adis16060_w_remove, -}; - -static __init int adis16060_init(void) -{ - int ret; - - ret = spi_register_driver(&adis16060_r_driver); - if (ret < 0) - return ret; - - ret = spi_register_driver(&adis16060_w_driver); - if (ret < 0) { - spi_unregister_driver(&adis16060_r_driver); - return ret; - } - - return 0; -} -module_init(adis16060_init); - -static __exit void adis16060_exit(void) -{ - spi_unregister_driver(&adis16060_w_driver); - spi_unregister_driver(&adis16060_r_driver); -} -module_exit(adis16060_exit); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADIS16060 Yaw Rate Gyroscope Driver"); -MODULE_LICENSE("GPL v2"); |