iio: gyro: Add itg3200
This patch adds support for the InvenSense itg3200. The itg3200 is a three-axis gyro with 16-bit ADC and I2C interface. Signed-off-by: Manuel Stahl <manuel.stahl@iis.fraunhofer.de> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Manuel Stahl
Jonathan Cameron
parent
420b0fcb52
commit
9dbf091da0
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@ -70,4 +70,12 @@ config IIO_ST_GYRO_SPI_3AXIS
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depends on IIO_ST_GYRO_3AXIS
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depends on IIO_ST_SENSORS_SPI
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config ITG3200
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tristate "InvenSense ITG3200 Digital 3-Axis Gyroscope I2C driver"
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depends on I2C
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select IIO_TRIGGERED_BUFFER if IIO_BUFFER
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help
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Say yes here to add support for the InvenSense ITG3200 digital
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3-axis gyroscope sensor.
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endmenu
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@ -8,6 +8,10 @@ obj-$(CONFIG_ADXRS450) += adxrs450.o
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obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
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itg3200-y := itg3200_core.o
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itg3200-$(CONFIG_IIO_BUFFER) += itg3200_buffer.o
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obj-$(CONFIG_ITG3200) += itg3200.o
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obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o
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st_gyro-y := st_gyro_core.o
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st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o
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@ -0,0 +1,156 @@
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/*
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* itg3200_buffer.c -- support InvenSense ITG3200
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* Digital 3-Axis Gyroscope driver
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*
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* Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
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* Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
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* Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/gyro/itg3200.h>
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static int itg3200_read_all_channels(struct i2c_client *i2c, __be16 *buf)
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{
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u8 tx = 0x80 | ITG3200_REG_TEMP_OUT_H;
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struct i2c_msg msg[2] = {
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{
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.addr = i2c->addr,
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.flags = i2c->flags,
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.len = 1,
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.buf = &tx,
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},
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{
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.addr = i2c->addr,
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.flags = i2c->flags | I2C_M_RD,
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.len = ITG3200_SCAN_ELEMENTS * sizeof(s16),
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.buf = (char *)&buf,
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},
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};
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return i2c_transfer(i2c->adapter, msg, 2);
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}
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static irqreturn_t itg3200_trigger_handler(int irq, void *p)
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{
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struct iio_poll_func *pf = p;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct itg3200 *st = iio_priv(indio_dev);
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__be16 buf[ITG3200_SCAN_ELEMENTS + sizeof(s64)/sizeof(u16)];
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int ret = itg3200_read_all_channels(st->i2c, buf);
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if (ret < 0)
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goto error_ret;
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if (indio_dev->scan_timestamp)
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memcpy(buf + indio_dev->scan_bytes - sizeof(s64),
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&pf->timestamp, sizeof(pf->timestamp));
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iio_push_to_buffers(indio_dev, (u8 *)buf);
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iio_trigger_notify_done(indio_dev->trig);
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error_ret:
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return IRQ_HANDLED;
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}
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int itg3200_buffer_configure(struct iio_dev *indio_dev)
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{
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return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
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itg3200_trigger_handler, NULL);
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}
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void itg3200_buffer_unconfigure(struct iio_dev *indio_dev)
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{
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iio_triggered_buffer_cleanup(indio_dev);
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}
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static int itg3200_data_rdy_trigger_set_state(struct iio_trigger *trig,
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bool state)
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{
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struct iio_dev *indio_dev = trig->private_data;
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int ret;
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u8 msc;
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_IRQ_CONFIG, &msc);
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if (ret)
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goto error_ret;
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if (state)
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msc |= ITG3200_IRQ_DATA_RDY_ENABLE;
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else
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msc &= ~ITG3200_IRQ_DATA_RDY_ENABLE;
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ret = itg3200_write_reg_8(indio_dev, ITG3200_REG_IRQ_CONFIG, msc);
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if (ret)
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goto error_ret;
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error_ret:
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return ret;
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}
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static const struct iio_trigger_ops itg3200_trigger_ops = {
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.owner = THIS_MODULE,
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.set_trigger_state = &itg3200_data_rdy_trigger_set_state,
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};
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int itg3200_probe_trigger(struct iio_dev *indio_dev)
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{
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int ret;
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struct itg3200 *st = iio_priv(indio_dev);
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st->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
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indio_dev->id);
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if (!st->trig)
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return -ENOMEM;
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ret = request_irq(st->i2c->irq,
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&iio_trigger_generic_data_rdy_poll,
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IRQF_TRIGGER_RISING,
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"itg3200_data_rdy",
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st->trig);
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if (ret)
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goto error_free_trig;
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st->trig->dev.parent = &st->i2c->dev;
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st->trig->ops = &itg3200_trigger_ops;
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st->trig->private_data = indio_dev;
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ret = iio_trigger_register(st->trig);
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if (ret)
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goto error_free_irq;
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/* select default trigger */
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indio_dev->trig = st->trig;
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return 0;
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error_free_irq:
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free_irq(st->i2c->irq, st->trig);
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error_free_trig:
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iio_trigger_free(st->trig);
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return ret;
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}
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void itg3200_remove_trigger(struct iio_dev *indio_dev)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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iio_trigger_unregister(st->trig);
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free_irq(st->i2c->irq, st->trig);
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iio_trigger_free(st->trig);
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}
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@ -0,0 +1,401 @@
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/*
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* itg3200_core.c -- support InvenSense ITG3200
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* Digital 3-Axis Gyroscope driver
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*
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* Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
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* Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
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* Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* TODO:
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* - Support digital low pass filter
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* - Support power management
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/events.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/gyro/itg3200.h>
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int itg3200_write_reg_8(struct iio_dev *indio_dev,
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u8 reg_address, u8 val)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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return i2c_smbus_write_byte_data(st->i2c, 0x80 | reg_address, val);
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}
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int itg3200_read_reg_8(struct iio_dev *indio_dev,
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u8 reg_address, u8 *val)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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int ret;
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ret = i2c_smbus_read_byte_data(st->i2c, reg_address);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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}
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static int itg3200_read_reg_s16(struct iio_dev *indio_dev, u8 lower_reg_address,
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int *val)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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struct i2c_client *client = st->i2c;
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int ret;
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s16 out;
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struct i2c_msg msg[2] = {
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{
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.addr = client->addr,
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.flags = client->flags,
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.len = 1,
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.buf = (char *)&lower_reg_address,
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},
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{
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.addr = client->addr,
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.flags = client->flags | I2C_M_RD,
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.len = 2,
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.buf = (char *)&out,
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},
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};
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lower_reg_address |= 0x80;
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ret = i2c_transfer(client->adapter, msg, 2);
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be16_to_cpus(&out);
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*val = out;
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return (ret == 2) ? 0 : ret;
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}
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static int itg3200_read_raw(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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int *val, int *val2, long info)
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{
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int ret = 0;
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u8 reg;
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switch (info) {
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case IIO_CHAN_INFO_RAW:
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reg = (u8)chan->address;
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ret = itg3200_read_reg_s16(indio_dev, reg, val);
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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*val = 0;
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if (chan->type == IIO_TEMP)
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*val2 = 1000000000/280;
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else
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*val2 = 1214142; /* (1 / 14,375) * (PI / 180) */
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return IIO_VAL_INT_PLUS_NANO;
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case IIO_CHAN_INFO_OFFSET:
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/* Only the temperature channel has an offset */
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*val = 23000;
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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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return ret;
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}
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static ssize_t itg3200_read_frequency(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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int ret, sps;
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u8 val;
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val);
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if (ret)
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return ret;
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sps = (val & ITG3200_DLPF_CFG_MASK) ? 1000 : 8000;
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_SAMPLE_RATE_DIV, &val);
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if (ret)
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return ret;
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sps /= val + 1;
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return sprintf(buf, "%d\n", sps);
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}
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static ssize_t itg3200_write_frequency(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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unsigned val;
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int ret;
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u8 t;
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ret = kstrtouint(buf, 10, &val);
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if (ret)
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return ret;
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mutex_lock(&indio_dev->mlock);
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &t);
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if (ret)
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goto err_ret;
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if (val == 0) {
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ret = -EINVAL;
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goto err_ret;
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}
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t = ((t & ITG3200_DLPF_CFG_MASK) ? 1000u : 8000u) / val - 1;
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ret = itg3200_write_reg_8(indio_dev, ITG3200_REG_SAMPLE_RATE_DIV, t);
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err_ret:
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mutex_unlock(&indio_dev->mlock);
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return ret ? ret : len;
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}
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/*
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* Reset device and internal registers to the power-up-default settings
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* Use the gyro clock as reference, as suggested by the datasheet
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*/
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static int itg3200_reset(struct iio_dev *indio_dev)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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int ret;
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dev_dbg(&st->i2c->dev, "reset device");
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ret = itg3200_write_reg_8(indio_dev,
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ITG3200_REG_POWER_MANAGEMENT,
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ITG3200_RESET);
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if (ret) {
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dev_err(&st->i2c->dev, "error resetting device");
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goto error_ret;
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}
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/* Wait for PLL (1ms according to datasheet) */
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udelay(1500);
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ret = itg3200_write_reg_8(indio_dev,
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ITG3200_REG_IRQ_CONFIG,
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ITG3200_IRQ_ACTIVE_HIGH |
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ITG3200_IRQ_PUSH_PULL |
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ITG3200_IRQ_LATCH_50US_PULSE |
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ITG3200_IRQ_LATCH_CLEAR_ANY);
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if (ret)
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dev_err(&st->i2c->dev, "error init device");
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error_ret:
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return ret;
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}
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/* itg3200_enable_full_scale() - Disables the digital low pass filter */
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static int itg3200_enable_full_scale(struct iio_dev *indio_dev)
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{
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u8 val;
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int ret;
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val);
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if (ret)
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goto err_ret;
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val |= ITG3200_DLPF_FS_SEL_2000;
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return itg3200_write_reg_8(indio_dev, ITG3200_REG_DLPF, val);
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err_ret:
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return ret;
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}
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static int itg3200_initial_setup(struct iio_dev *indio_dev)
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{
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struct itg3200 *st = iio_priv(indio_dev);
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int ret;
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u8 val;
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ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_ADDRESS, &val);
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if (ret)
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goto err_ret;
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if (((val >> 1) & 0x3f) != 0x34) {
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dev_err(&st->i2c->dev, "invalid reg value 0x%02x", val);
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ret = -ENXIO;
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goto err_ret;
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}
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ret = itg3200_reset(indio_dev);
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if (ret)
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goto err_ret;
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ret = itg3200_enable_full_scale(indio_dev);
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err_ret:
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return ret;
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}
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#define ITG3200_TEMP_INFO_MASK (IIO_CHAN_INFO_OFFSET_SHARED_BIT | \
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IIO_CHAN_INFO_SCALE_SHARED_BIT | \
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IIO_CHAN_INFO_RAW_SEPARATE_BIT)
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#define ITG3200_GYRO_INFO_MASK (IIO_CHAN_INFO_SCALE_SHARED_BIT | \
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IIO_CHAN_INFO_RAW_SEPARATE_BIT)
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#define ITG3200_ST \
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{ .sign = 's', .realbits = 16, .storagebits = 16, .endianness = IIO_BE }
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#define ITG3200_GYRO_CHAN(_mod) { \
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.type = IIO_ANGL_VEL, \
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.modified = 1, \
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.channel2 = IIO_MOD_ ## _mod, \
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.info_mask = ITG3200_GYRO_INFO_MASK, \
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.address = ITG3200_REG_GYRO_ ## _mod ## OUT_H, \
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.scan_index = ITG3200_SCAN_GYRO_ ## _mod, \
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.scan_type = ITG3200_ST, \
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}
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static const struct iio_chan_spec itg3200_channels[] = {
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{
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.type = IIO_TEMP,
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.channel2 = IIO_NO_MOD,
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.info_mask = ITG3200_TEMP_INFO_MASK,
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.address = ITG3200_REG_TEMP_OUT_H,
|
||||
.scan_index = ITG3200_SCAN_TEMP,
|
||||
.scan_type = ITG3200_ST,
|
||||
},
|
||||
ITG3200_GYRO_CHAN(X),
|
||||
ITG3200_GYRO_CHAN(Y),
|
||||
ITG3200_GYRO_CHAN(Z),
|
||||
IIO_CHAN_SOFT_TIMESTAMP(ITG3200_SCAN_ELEMENTS),
|
||||
};
|
||||
|
||||
/* IIO device attributes */
|
||||
static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, itg3200_read_frequency,
|
||||
itg3200_write_frequency);
|
||||
|
||||
static struct attribute *itg3200_attributes[] = {
|
||||
&iio_dev_attr_sampling_frequency.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group itg3200_attribute_group = {
|
||||
.attrs = itg3200_attributes,
|
||||
};
|
||||
|
||||
static const struct iio_info itg3200_info = {
|
||||
.attrs = &itg3200_attribute_group,
|
||||
.read_raw = &itg3200_read_raw,
|
||||
.driver_module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static const unsigned long itg3200_available_scan_masks[] = { 0xffffffff, 0x0 };
|
||||
|
||||
static int itg3200_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
int ret;
|
||||
struct itg3200 *st;
|
||||
struct iio_dev *indio_dev;
|
||||
|
||||
dev_dbg(&client->dev, "probe I2C dev with IRQ %i", client->irq);
|
||||
|
||||
indio_dev = iio_device_alloc(sizeof(*st));
|
||||
if (indio_dev == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_ret;
|
||||
}
|
||||
|
||||
st = iio_priv(indio_dev);
|
||||
|
||||
i2c_set_clientdata(client, indio_dev);
|
||||
st->i2c = client;
|
||||
|
||||
indio_dev->dev.parent = &client->dev;
|
||||
indio_dev->name = client->dev.driver->name;
|
||||
indio_dev->channels = itg3200_channels;
|
||||
indio_dev->num_channels = ARRAY_SIZE(itg3200_channels);
|
||||
indio_dev->available_scan_masks = itg3200_available_scan_masks;
|
||||
indio_dev->info = &itg3200_info;
|
||||
indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
|
||||
ret = itg3200_buffer_configure(indio_dev);
|
||||
if (ret)
|
||||
goto error_free_dev;
|
||||
|
||||
if (client->irq) {
|
||||
ret = itg3200_probe_trigger(indio_dev);
|
||||
if (ret)
|
||||
goto error_unconfigure_buffer;
|
||||
}
|
||||
|
||||
ret = itg3200_initial_setup(indio_dev);
|
||||
if (ret)
|
||||
goto error_remove_trigger;
|
||||
|
||||
ret = iio_device_register(indio_dev);
|
||||
if (ret)
|
||||
goto error_remove_trigger;
|
||||
|
||||
return 0;
|
||||
|
||||
error_remove_trigger:
|
||||
if (client->irq)
|
||||
itg3200_remove_trigger(indio_dev);
|
||||
error_unconfigure_buffer:
|
||||
itg3200_buffer_unconfigure(indio_dev);
|
||||
error_free_dev:
|
||||
iio_device_free(indio_dev);
|
||||
error_ret:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int itg3200_remove(struct i2c_client *client)
|
||||
{
|
||||
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
||||
|
||||
iio_device_unregister(indio_dev);
|
||||
|
||||
if (client->irq)
|
||||
itg3200_remove_trigger(indio_dev);
|
||||
|
||||
itg3200_buffer_unconfigure(indio_dev);
|
||||
|
||||
iio_device_free(indio_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id itg3200_id[] = {
|
||||
{ "itg3200", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, itg3200_id);
|
||||
|
||||
static struct i2c_driver itg3200_driver = {
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "itg3200",
|
||||
},
|
||||
.id_table = itg3200_id,
|
||||
.probe = itg3200_probe,
|
||||
.remove = itg3200_remove,
|
||||
};
|
||||
|
||||
module_i2c_driver(itg3200_driver);
|
||||
|
||||
MODULE_AUTHOR("Christian Strobel <christian.strobel@iis.fraunhofer.de>");
|
||||
MODULE_DESCRIPTION("ITG3200 Gyroscope I2C driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -0,0 +1,154 @@
|
|||
/*
|
||||
* itg3200.h -- support InvenSense ITG3200
|
||||
* Digital 3-Axis Gyroscope driver
|
||||
*
|
||||
* Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
|
||||
* Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
|
||||
* Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef I2C_ITG3200_H_
|
||||
#define I2C_ITG3200_H_
|
||||
|
||||
#include <linux/iio/iio.h>
|
||||
|
||||
/* Register with I2C address (34h) */
|
||||
#define ITG3200_REG_ADDRESS 0x00
|
||||
|
||||
/* Sample rate divider
|
||||
* Range: 0 to 255
|
||||
* Default value: 0x00 */
|
||||
#define ITG3200_REG_SAMPLE_RATE_DIV 0x15
|
||||
|
||||
/* Digital low pass filter settings */
|
||||
#define ITG3200_REG_DLPF 0x16
|
||||
/* DLPF full scale range */
|
||||
#define ITG3200_DLPF_FS_SEL_2000 0x18
|
||||
/* Bandwidth (Hz) and internal sample rate
|
||||
* (kHz) of DLPF */
|
||||
#define ITG3200_DLPF_256_8 0x00
|
||||
#define ITG3200_DLPF_188_1 0x01
|
||||
#define ITG3200_DLPF_98_1 0x02
|
||||
#define ITG3200_DLPF_42_1 0x03
|
||||
#define ITG3200_DLPF_20_1 0x04
|
||||
#define ITG3200_DLPF_10_1 0x05
|
||||
#define ITG3200_DLPF_5_1 0x06
|
||||
|
||||
#define ITG3200_DLPF_CFG_MASK 0x07
|
||||
|
||||
/* Configuration for interrupt operations */
|
||||
#define ITG3200_REG_IRQ_CONFIG 0x17
|
||||
/* Logic level */
|
||||
#define ITG3200_IRQ_ACTIVE_LOW 0x80
|
||||
#define ITG3200_IRQ_ACTIVE_HIGH 0x00
|
||||
/* Drive type */
|
||||
#define ITG3200_IRQ_OPEN_DRAIN 0x40
|
||||
#define ITG3200_IRQ_PUSH_PULL 0x00
|
||||
/* Latch mode */
|
||||
#define ITG3200_IRQ_LATCH_UNTIL_CLEARED 0x20
|
||||
#define ITG3200_IRQ_LATCH_50US_PULSE 0x00
|
||||
/* Latch clear method */
|
||||
#define ITG3200_IRQ_LATCH_CLEAR_ANY 0x10
|
||||
#define ITG3200_IRQ_LATCH_CLEAR_STATUS 0x00
|
||||
/* Enable interrupt when device is ready */
|
||||
#define ITG3200_IRQ_DEVICE_RDY_ENABLE 0x04
|
||||
/* Enable interrupt when data is available */
|
||||
#define ITG3200_IRQ_DATA_RDY_ENABLE 0x01
|
||||
|
||||
/* Determine the status of ITG-3200 interrupts */
|
||||
#define ITG3200_REG_IRQ_STATUS 0x1A
|
||||
/* Status of 'device is ready'-interrupt */
|
||||
#define ITG3200_IRQ_DEVICE_RDY_STATUS 0x04
|
||||
/* Status of 'data is available'-interrupt */
|
||||
#define ITG3200_IRQ_DATA_RDY_STATUS 0x01
|
||||
|
||||
/* Sensor registers */
|
||||
#define ITG3200_REG_TEMP_OUT_H 0x1B
|
||||
#define ITG3200_REG_TEMP_OUT_L 0x1C
|
||||
#define ITG3200_REG_GYRO_XOUT_H 0x1D
|
||||
#define ITG3200_REG_GYRO_XOUT_L 0x1E
|
||||
#define ITG3200_REG_GYRO_YOUT_H 0x1F
|
||||
#define ITG3200_REG_GYRO_YOUT_L 0x20
|
||||
#define ITG3200_REG_GYRO_ZOUT_H 0x21
|
||||
#define ITG3200_REG_GYRO_ZOUT_L 0x22
|
||||
|
||||
/* Power management */
|
||||
#define ITG3200_REG_POWER_MANAGEMENT 0x3E
|
||||
/* Reset device and internal registers to the
|
||||
* power-up-default settings */
|
||||
#define ITG3200_RESET 0x80
|
||||
/* Enable low power sleep mode */
|
||||
#define ITG3200_SLEEP 0x40
|
||||
/* Put according gyroscope in standby mode */
|
||||
#define ITG3200_STANDBY_GYRO_X 0x20
|
||||
#define ITG3200_STANDBY_GYRO_Y 0x10
|
||||
#define ITG3200_STANDBY_GYRO_Z 0x08
|
||||
/* Determine the device clock source */
|
||||
#define ITG3200_CLK_INTERNAL 0x00
|
||||
#define ITG3200_CLK_GYRO_X 0x01
|
||||
#define ITG3200_CLK_GYRO_Y 0x02
|
||||
#define ITG3200_CLK_GYRO_Z 0x03
|
||||
#define ITG3200_CLK_EXT_32K 0x04
|
||||
#define ITG3200_CLK_EXT_19M 0x05
|
||||
|
||||
|
||||
/**
|
||||
* struct itg3200 - device instance specific data
|
||||
* @i2c: actual i2c_client
|
||||
* @trig: data ready trigger from itg3200 pin
|
||||
**/
|
||||
struct itg3200 {
|
||||
struct i2c_client *i2c;
|
||||
struct iio_trigger *trig;
|
||||
};
|
||||
|
||||
enum ITG3200_SCAN_INDEX {
|
||||
ITG3200_SCAN_TEMP,
|
||||
ITG3200_SCAN_GYRO_X,
|
||||
ITG3200_SCAN_GYRO_Y,
|
||||
ITG3200_SCAN_GYRO_Z,
|
||||
ITG3200_SCAN_ELEMENTS,
|
||||
};
|
||||
|
||||
int itg3200_write_reg_8(struct iio_dev *indio_dev,
|
||||
u8 reg_address, u8 val);
|
||||
|
||||
int itg3200_read_reg_8(struct iio_dev *indio_dev,
|
||||
u8 reg_address, u8 *val);
|
||||
|
||||
|
||||
#ifdef CONFIG_IIO_BUFFER
|
||||
|
||||
void itg3200_remove_trigger(struct iio_dev *indio_dev);
|
||||
int itg3200_probe_trigger(struct iio_dev *indio_dev);
|
||||
|
||||
int itg3200_buffer_configure(struct iio_dev *indio_dev);
|
||||
void itg3200_buffer_unconfigure(struct iio_dev *indio_dev);
|
||||
|
||||
#else /* CONFIG_IIO_BUFFER */
|
||||
|
||||
static inline void itg3200_remove_trigger(struct iio_dev *indio_dev)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int itg3200_probe_trigger(struct iio_dev *indio_dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int itg3200_buffer_configure(struct iio_dev *indio_dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void itg3200_buffer_unconfigure(struct iio_dev *indio_dev)
|
||||
{
|
||||
}
|
||||
|
||||
#endif /* CONFIG_IIO_RING_BUFFER */
|
||||
|
||||
#endif /* ITG3200_H_ */
|
||||
Loading…
Reference in New Issue