diff options
Diffstat (limited to 'drivers/staging/iio/gyro/adis16130_core.c')
-rw-r--r-- | drivers/staging/iio/gyro/adis16130_core.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/drivers/staging/iio/gyro/adis16130_core.c b/drivers/staging/iio/gyro/adis16130_core.c deleted file mode 100644 index 531b803cb2ac..000000000000 --- a/drivers/staging/iio/gyro/adis16130_core.c +++ /dev/null @@ -1,178 +0,0 @@ -/* - * ADIS16130 Digital Output, High Precision Angular Rate Sensor 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/list.h> -#include <linux/module.h> - -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> - -#define ADIS16130_CON 0x0 -#define ADIS16130_CON_RD (1 << 6) -#define ADIS16130_IOP 0x1 - -/* 1 = data-ready signal low when unread data on all channels; */ -#define ADIS16130_IOP_ALL_RDY (1 << 3) -#define ADIS16130_IOP_SYNC (1 << 0) /* 1 = synchronization enabled */ -#define ADIS16130_RATEDATA 0x8 /* Gyroscope output, rate of rotation */ -#define ADIS16130_TEMPDATA 0xA /* Temperature output */ -#define ADIS16130_RATECS 0x28 /* Gyroscope channel setup */ -#define ADIS16130_RATECS_EN (1 << 3) /* 1 = channel enable; */ -#define ADIS16130_TEMPCS 0x2A /* Temperature channel setup */ -#define ADIS16130_TEMPCS_EN (1 << 3) -#define ADIS16130_RATECONV 0x30 -#define ADIS16130_TEMPCONV 0x32 -#define ADIS16130_MODE 0x38 -#define ADIS16130_MODE_24BIT (1 << 1) /* 1 = 24-bit resolution; */ - -/** - * struct adis16130_state - device instance specific data - * @us: actual spi_device to write data - * @buf_lock: mutex to protect tx and rx - * @buf: unified tx/rx buffer - **/ -struct adis16130_state { - struct spi_device *us; - struct mutex buf_lock; - u8 buf[4] ____cacheline_aligned; -}; - -static int adis16130_spi_read(struct iio_dev *indio_dev, u8 reg_addr, u32 *val) -{ - int ret; - struct adis16130_state *st = iio_priv(indio_dev); - struct spi_message msg; - struct spi_transfer xfer = { - .tx_buf = st->buf, - .rx_buf = st->buf, - .len = 4, - }; - - mutex_lock(&st->buf_lock); - - st->buf[0] = ADIS16130_CON_RD | reg_addr; - st->buf[1] = st->buf[2] = st->buf[3] = 0; - - spi_message_init(&msg); - spi_message_add_tail(&xfer, &msg); - ret = spi_sync(st->us, &msg); - ret = spi_read(st->us, st->buf, 4); - - if (ret == 0) - *val = (st->buf[1] << 16) | (st->buf[2] << 8) | st->buf[3]; - mutex_unlock(&st->buf_lock); - - return ret; -} - -static int adis16130_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, - long mask) -{ - int ret; - u32 temp; - - /* Take the iio_dev status lock */ - mutex_lock(&indio_dev->mlock); - ret = adis16130_spi_read(indio_dev, chan->address, &temp); - mutex_unlock(&indio_dev->mlock); - if (ret) - return ret; - *val = temp; - return IIO_VAL_INT; -} - -static const struct iio_chan_spec adis16130_channels[] = { - { - .type = IIO_ANGL_VEL, - .modified = 1, - .channel2 = IIO_MOD_Z, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .address = ADIS16130_RATEDATA, - }, { - .type = IIO_TEMP, - .indexed = 1, - .channel = 0, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .address = ADIS16130_TEMPDATA, - } -}; - -static const struct iio_info adis16130_info = { - .read_raw = &adis16130_read_raw, - .driver_module = THIS_MODULE, -}; - -static int adis16130_probe(struct spi_device *spi) -{ - int ret; - struct adis16130_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); - st->us = spi; - mutex_init(&st->buf_lock); - indio_dev->name = spi->dev.driver->name; - indio_dev->channels = adis16130_channels; - indio_dev->num_channels = ARRAY_SIZE(adis16130_channels); - indio_dev->dev.parent = &spi->dev; - indio_dev->info = &adis16130_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 adis16130_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 adis16130_driver = { - .driver = { - .name = "adis16130", - .owner = THIS_MODULE, - }, - .probe = adis16130_probe, - .remove = adis16130_remove, -}; -module_spi_driver(adis16130_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:adis16130"); |