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https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-29 11:11:45 -04:00
staging:iio:adis16130: Move out of staging
The adis16130 driver is fairly simple and it a good shape now, so move it out of staging. Remove an outdated FIXME along the way. Signed-off-by: Lars-Peter Clausen <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
This commit is contained in:
Lars-Peter Clausen
Jonathan Cameron
parent
597e1a86df
commit
32341859f0
5 changed files with 8 additions and 11 deletions
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@ -10,6 +10,13 @@ config ADIS16080
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Say yes here to build support for Analog Devices ADIS16080, ADIS16100 Yaw
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Rate Gyroscope with SPI.
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config ADIS16130
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tristate "Analog Devices ADIS16130 High Precision Angular Rate Sensor driver"
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depends on SPI
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help
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Say yes here to build support for Analog Devices ADIS16130 High Precision
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Angular Rate Sensor driver.
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config ADIS16136
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tristate "Analog devices ADIS16136 and similar gyroscopes driver"
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depends on SPI_MASTER
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@ -3,6 +3,7 @@
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#
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obj-$(CONFIG_ADIS16080) += adis16080.o
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obj-$(CONFIG_ADIS16130) += adis16130.o
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obj-$(CONFIG_ADIS16136) += adis16136.o
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obj-$(CONFIG_ADXRS450) += adxrs450.o
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207
drivers/iio/gyro/adis16130.c
Normal file
207
drivers/iio/gyro/adis16130.c
Normal file
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@ -0,0 +1,207 @@
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/*
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* ADIS16130 Digital Output, High Precision Angular Rate Sensor driver
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/mutex.h>
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#include <linux/kernel.h>
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#include <linux/spi/spi.h>
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#include <linux/module.h>
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#include <linux/iio/iio.h>
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#define ADIS16130_CON 0x0
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#define ADIS16130_CON_RD (1 << 6)
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#define ADIS16130_IOP 0x1
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/* 1 = data-ready signal low when unread data on all channels; */
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#define ADIS16130_IOP_ALL_RDY (1 << 3)
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#define ADIS16130_IOP_SYNC (1 << 0) /* 1 = synchronization enabled */
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#define ADIS16130_RATEDATA 0x8 /* Gyroscope output, rate of rotation */
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#define ADIS16130_TEMPDATA 0xA /* Temperature output */
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#define ADIS16130_RATECS 0x28 /* Gyroscope channel setup */
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#define ADIS16130_RATECS_EN (1 << 3) /* 1 = channel enable; */
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#define ADIS16130_TEMPCS 0x2A /* Temperature channel setup */
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#define ADIS16130_TEMPCS_EN (1 << 3)
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#define ADIS16130_RATECONV 0x30
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#define ADIS16130_TEMPCONV 0x32
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#define ADIS16130_MODE 0x38
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#define ADIS16130_MODE_24BIT (1 << 1) /* 1 = 24-bit resolution; */
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/**
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* struct adis16130_state - device instance specific data
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* @us: actual spi_device to write data
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* @buf_lock: mutex to protect tx and rx
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* @buf: unified tx/rx buffer
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**/
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struct adis16130_state {
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struct spi_device *us;
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struct mutex buf_lock;
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u8 buf[4] ____cacheline_aligned;
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};
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static int adis16130_spi_read(struct iio_dev *indio_dev, u8 reg_addr, u32 *val)
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{
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int ret;
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struct adis16130_state *st = iio_priv(indio_dev);
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struct spi_message msg;
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struct spi_transfer xfer = {
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.tx_buf = st->buf,
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.rx_buf = st->buf,
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.len = 4,
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};
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mutex_lock(&st->buf_lock);
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st->buf[0] = ADIS16130_CON_RD | reg_addr;
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st->buf[1] = st->buf[2] = st->buf[3] = 0;
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->us, &msg);
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if (ret == 0)
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*val = (st->buf[1] << 16) | (st->buf[2] << 8) | st->buf[3];
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mutex_unlock(&st->buf_lock);
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return ret;
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}
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static int adis16130_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2,
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long mask)
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{
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int ret;
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u32 temp;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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/* Take the iio_dev status lock */
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mutex_lock(&indio_dev->mlock);
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ret = adis16130_spi_read(indio_dev, chan->address, &temp);
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mutex_unlock(&indio_dev->mlock);
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if (ret)
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return ret;
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*val = temp;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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switch (chan->type) {
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case IIO_ANGL_VEL:
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/* 0 degree = 838860, 250 degree = 14260608 */
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*val = 250;
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*val2 = 336440817; /* RAD_TO_DEGREE(14260608 - 8388608) */
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return IIO_VAL_FRACTIONAL;
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case IIO_TEMP:
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/* 0C = 8036283, 105C = 9516048 */
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*val = 105000;
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*val2 = 9516048 - 8036283;
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return IIO_VAL_FRACTIONAL;
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default:
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return -EINVAL;
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}
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break;
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case IIO_CHAN_INFO_OFFSET:
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switch (chan->type) {
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case IIO_ANGL_VEL:
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*val = -8388608;
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return IIO_VAL_INT;
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case IIO_TEMP:
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*val = -8036283;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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break;
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}
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return -EINVAL;
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}
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static const struct iio_chan_spec adis16130_channels[] = {
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{
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.type = IIO_ANGL_VEL,
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.modified = 1,
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.channel2 = IIO_MOD_Z,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE) |
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BIT(IIO_CHAN_INFO_OFFSET),
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.address = ADIS16130_RATEDATA,
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}, {
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.type = IIO_TEMP,
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.indexed = 1,
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.channel = 0,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE) |
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BIT(IIO_CHAN_INFO_OFFSET),
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.address = ADIS16130_TEMPDATA,
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}
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};
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static const struct iio_info adis16130_info = {
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.read_raw = &adis16130_read_raw,
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.driver_module = THIS_MODULE,
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};
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static int adis16130_probe(struct spi_device *spi)
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{
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int ret;
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struct adis16130_state *st;
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struct iio_dev *indio_dev;
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/* setup the industrialio driver allocated elements */
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indio_dev = iio_device_alloc(sizeof(*st));
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if (indio_dev == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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st = iio_priv(indio_dev);
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/* this is only used for removal purposes */
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spi_set_drvdata(spi, indio_dev);
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st->us = spi;
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mutex_init(&st->buf_lock);
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indio_dev->name = spi->dev.driver->name;
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indio_dev->channels = adis16130_channels;
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indio_dev->num_channels = ARRAY_SIZE(adis16130_channels);
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indio_dev->dev.parent = &spi->dev;
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indio_dev->info = &adis16130_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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ret = iio_device_register(indio_dev);
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if (ret)
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goto error_free_dev;
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return 0;
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error_free_dev:
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iio_device_free(indio_dev);
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error_ret:
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return ret;
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}
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static int adis16130_remove(struct spi_device *spi)
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{
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iio_device_unregister(spi_get_drvdata(spi));
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iio_device_free(spi_get_drvdata(spi));
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return 0;
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}
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static struct spi_driver adis16130_driver = {
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.driver = {
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.name = "adis16130",
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.owner = THIS_MODULE,
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},
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.probe = adis16130_probe,
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.remove = adis16130_remove,
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};
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module_spi_driver(adis16130_driver);
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MODULE_AUTHOR("Barry Song <[email protected]>");
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MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("spi:adis16130");
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