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    Subject[PATCH 5/5] Input: add CMR3000 gyrsocope driver
    Date
    Add support for CMR3000 Tri-axis accelerometer. CMR3000 supports both
    I2C/SPI bus communication, currently the driver supports SPI
    communication, since I have no hardware to test the I2C communication.

    Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
    ---
    drivers/input/misc/Kconfig | 24 ++
    drivers/input/misc/Makefile | 2 +
    drivers/input/misc/cmr3000_d0x.c | 400 ++++++++++++++++++++++++++++++++++
    drivers/input/misc/cmr3000_d0x.h | 45 ++++
    drivers/input/misc/cmr3000_d0x_spi.c | 178 +++++++++++++++
    include/linux/input/cmr3000.h | 54 +++++
    6 files changed, 703 insertions(+), 0 deletions(-)
    create mode 100644 drivers/input/misc/cmr3000_d0x.c
    create mode 100644 drivers/input/misc/cmr3000_d0x.h
    create mode 100644 drivers/input/misc/cmr3000_d0x_spi.c
    create mode 100644 include/linux/input/cmr3000.h

    diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
    index b9f2e93..7c56f94 100644
    --- a/drivers/input/misc/Kconfig
    +++ b/drivers/input/misc/Kconfig
    @@ -524,6 +524,30 @@ config INPUT_CMA3000_SPI
    To compile this driver as a module, choose M here: the
    module will be called cma3000_d0x_spi.

    +config INPUT_CMR3000
    + tristate "VTI CMR3000 Tri-axis gyroscope"
    + help
    + Say Y here if you want to use VTI CMR3000_D0x Gyroscope
    + driver
    +
    + This driver currently only supports SPI interface to the
    + controller. Also select the SPI method.
    +
    + If unsure, say N
    +
    + To compile this driver as a module, choose M here: the
    + module will be called cmr3000_d0x.
    +
    +config INPUT_CMR3000_SPI
    + tristate "Support SPI bus connection"
    + depends on INPUT_CMR3000 && SPI
    + help
    + Say Y here if you want to use VTI CMR3000_D0x Gyroscope
    + through SPI interface.
    +
    + To compile this driver as a module, choose M here: the
    + module will be called cmr3000_d0x_spi.
    +
    config INPUT_XEN_KBDDEV_FRONTEND
    tristate "Xen virtual keyboard and mouse support"
    depends on XEN_FBDEV_FRONTEND
    diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
    index 7305f6f..c7fe09a 100644
    --- a/drivers/input/misc/Makefile
    +++ b/drivers/input/misc/Makefile
    @@ -21,6 +21,8 @@ obj-$(CONFIG_INPUT_CM109) += cm109.o
    obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
    obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
    obj-$(CONFIG_INPUT_CMA3000_SPI) += cma3000_d0x_spi.o
    +obj-$(CONFIG_INPUT_CMR3000) += cmr3000_d0x.o
    +obj-$(CONFIG_INPUT_CMR3000_SPI) += cmr3000_d0x_spi.o
    obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
    obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
    obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
    diff --git a/drivers/input/misc/cmr3000_d0x.c b/drivers/input/misc/cmr3000_d0x.c
    new file mode 100644
    index 0000000..5ffe38b
    --- /dev/null
    +++ b/drivers/input/misc/cmr3000_d0x.c
    @@ -0,0 +1,400 @@
    +/*
    + * VTI CMR3000_D0x Gyroscope driver
    + *
    + * Copyright (C) 2011 Qtechnology
    + * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
    + *
    + * Based on:
    + * Author: Hemanth V <hemanthv@ti.com>
    + *
    + * 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.
    + *
    + * This program is distributed in the hope that it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    + *
    + * You should have received a copy of the GNU General Public License along with
    + * this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#include <linux/types.h>
    +#include <linux/interrupt.h>
    +#include <linux/delay.h>
    +#include <linux/slab.h>
    +#include <linux/input.h>
    +#include <linux/input/cmr3000.h>
    +
    +#include "cmr3000_d0x.h"
    +
    +#define CMR3000_REV 0x21
    +
    +#define CMR3000_WHOAMI 0x00
    +#define CMR3000_REVID 0x01
    +#define CMR3000_CTRL 0x02
    +#define CMR3000_STATUS 0x03
    +#define CMR3000_X_LSB 0x0C
    +#define CMR3000_X_MSB 0x0D
    +#define CMR3000_Y_LSB 0x0E
    +#define CMR3000_Y_MSB 0x0F
    +#define CMR3000_Z_LSB 0x10
    +#define CMR3000_Z_MSB 0x11
    +#define CMR3000_I2C_ADDR 0x22
    +#define CMR3000_PDR 0x26
    +
    +#define CMR3000_IRQDIS (1 << 0)
    +#define CMR3000_MODEMASK (3 << 1)
    +#define CMR3000_BUSI2C (0 << 4)
    +#define CMR3000_BUSSPI (1 << 4)
    +#define CMR3000_INTLOW (1 << 6)
    +#define CMR3000_INTHIGH (0 << 6)
    +#define CMR3000_RST (1 << 7)
    +
    +#define CMRMODE_SHIFT 1
    +#define CMRIRQLEVEL_SHIFT 6
    +
    +#define CMR3000_STATUS_PERR (1 << 0)
    +#define CMR3000_STATUS_PORST (1 << 3)
    +
    +/* Settling time delay in ms */
    +#define CMR3000_SETDELAY 30
    +
    +/* Delay for clearing interrupt in us */
    +#define CMR3000_INTDELAY 44
    +
    +/*
    + * Bit weights mult/div in dps for bit 0, other bits need
    + * multipy factor 2^n. 11th bit is the sign bit.
    + */
    +#define BIT_TO_DPS_MUL 3
    +#define BIT_TO_DPS_DIV 32
    +
    +static struct cmr3000_platform_data cmr3000_default_pdata = {
    + .irq_level = CMR3000_INTHIGH,
    + .mode = CMRMODE_MEAS80,
    + .irqflags = 0,
    + .fuzz_x = 1,
    + .fuzz_y = 1,
    + .fuzz_z = 1,
    +};
    +
    +struct cmr3000_accl_data {
    + const struct cmr3000_bus_ops *bus_ops;
    + const struct cmr3000_platform_data *pdata;
    +
    + struct device *dev;
    + struct input_dev *input_dev;
    +
    + int irq_level;
    + u8 mode;
    +
    + int bit_to_mg;
    + int irq;
    +
    + struct mutex mutex;
    + bool opened;
    + bool suspended;
    +};
    +
    +#define CMR3000_READ(data, reg, msg) \
    + (data->bus_ops->read(data->dev, reg, msg))
    +#define CMR3000_SET(data, reg, val, msg) \
    + ((data)->bus_ops->write(data->dev, reg, val, msg))
    +
    +static void decode_dps(struct cmr3000_accl_data *data, int *datax,
    + int *datay, int *dataz)
    +{
    + /* Data in 2's complement, convert to dps */
    + *datax = (((s16) ((*datax) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
    + *datay = (((s16) ((*datay) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
    + *dataz = (((s16) ((*dataz) << 2)) * BIT_TO_DPS_MUL) / BIT_TO_DPS_DIV;
    +}
    +
    +static irqreturn_t cmr3000_thread_irq(int irq, void *dev_id)
    +{
    + struct cmr3000_accl_data *data = dev_id;
    + int datax, datay, dataz;
    + u8 mode, intr_status;
    +
    + intr_status = CMR3000_READ(data, CMR3000_STATUS, "interrupt status");
    + intr_status = CMR3000_READ(data, CMR3000_CTRL, "control mode");
    + if (intr_status < 0)
    + return IRQ_NONE;
    +
    + /* Interrupt not for this device */
    + if (intr_status & CMR3000_IRQDIS)
    + return IRQ_NONE;
    +
    + mode = (intr_status & CMR3000_MODEMASK) >> CMRMODE_SHIFT;
    + if ((mode != CMRMODE_MEAS80)
    + && (mode != CMRMODE_MEAS20))
    + return IRQ_NONE;
    +
    + datax = (CMR3000_READ(data, CMR3000_X_MSB, "X_MSB")) << 8;
    + datax |= CMR3000_READ(data, CMR3000_X_LSB, "X_LSB");
    + datay = (CMR3000_READ(data, CMR3000_Y_MSB, "Y_MSB")) << 8;
    + datay |= CMR3000_READ(data, CMR3000_Y_LSB, "Y_LSB");
    + dataz = (CMR3000_READ(data, CMR3000_Z_MSB, "Z_MSB")) << 8;
    + dataz |= CMR3000_READ(data, CMR3000_Z_LSB, "Z_LSB");
    +
    + /* Device closed */
    + if ((data->mode != CMRMODE_MEAS80)
    + && (data->mode != CMRMODE_MEAS20))
    + return IRQ_NONE;
    +
    + /* Decode register values to dps */
    + decode_dps(data, &datax, &datay, &dataz);
    +
    + input_report_abs(data->input_dev, ABS_X, datax);
    + input_report_abs(data->input_dev, ABS_Y, datay);
    + input_report_abs(data->input_dev, ABS_Z, dataz);
    + input_sync(data->input_dev);
    +
    + return IRQ_HANDLED;
    +}
    +
    +static int cmr3000_poweron(struct cmr3000_accl_data *data)
    +{
    + const struct cmr3000_platform_data *pdata = data->pdata;
    + u8 ctrl;
    + int ret;
    +
    + ctrl = pdata->irq_level << CMRIRQLEVEL_SHIFT;
    + ctrl |= data->mode << CMRMODE_SHIFT;
    + ctrl |= data->bus_ops->ctrl_mod;
    + ret = CMR3000_SET(data, CMR3000_CTRL, ctrl, "Mode setting");
    + if (ret < 0)
    + return -EIO;
    +
    + msleep(CMR3000_SETDELAY);
    +
    + return 0;
    +}
    +
    +static int cmr3000_poweroff(struct cmr3000_accl_data *data)
    +{
    + int ret;
    + u8 ctrl = CMRMODE_POFF;
    +
    + ctrl |= data->bus_ops->ctrl_mod;
    + ctrl |= CMR3000_IRQDIS;
    +
    + ret = CMR3000_SET(data, CMR3000_CTRL, ctrl, "Mode setting");
    + msleep(CMR3000_SETDELAY);
    +
    + return ret;
    +}
    +
    +static int cmr3000_reset(struct cmr3000_accl_data *data)
    +{
    + int val;
    +
    + /* Reset chip */
    + CMR3000_SET(data, CMR3000_CTRL, CMR3000_RST, "Reset");
    + mdelay(2);
    +
    + /* Settling time delay */
    + val = CMR3000_READ(data, CMR3000_STATUS, "Status");
    + if (val < 0) {
    + dev_err(data->dev, "Reset failed\n");
    + return val;
    + }
    +
    + if (val & CMR3000_STATUS_PERR) {
    + dev_err(data->dev, "Parity Error\n");
    + return -EIO;
    + }
    +
    + return cmr3000_poweroff(data);
    +}
    +
    +static int cmr3000_open(struct input_dev *input_dev)
    +{
    + struct cmr3000_accl_data *data = input_get_drvdata(input_dev);
    +
    + mutex_lock(&data->mutex);
    +
    + if (!data->suspended)
    + cmr3000_poweron(data);
    +
    + data->opened = true;
    +
    + mutex_unlock(&data->mutex);
    +
    + return 0;
    +}
    +
    +static void cmr3000_close(struct input_dev *input_dev)
    +{
    + struct cmr3000_accl_data *data = input_get_drvdata(input_dev);
    +
    + mutex_lock(&data->mutex);
    +
    + if (!data->suspended)
    + cmr3000_poweroff(data);
    +
    + data->opened = false;
    +
    + mutex_unlock(&data->mutex);
    +}
    +
    +void cmr3000_suspend(struct cmr3000_accl_data *data)
    +{
    + mutex_lock(&data->mutex);
    +
    + if (!data->suspended && data->opened)
    + cmr3000_poweroff(data);
    +
    + data->suspended = true;
    +
    + mutex_unlock(&data->mutex);
    +}
    +EXPORT_SYMBOL(cmr3000_suspend);
    +
    +void cmr3000_resume(struct cmr3000_accl_data *data)
    +{
    + mutex_lock(&data->mutex);
    +
    + if (data->suspended && data->opened)
    + cmr3000_poweron(data);
    +
    + data->suspended = false;
    +
    + mutex_unlock(&data->mutex);
    +}
    +EXPORT_SYMBOL(cmr3000_resume);
    +
    +struct cmr3000_accl_data *cmr3000_init(struct device *dev, int irq,
    + const struct cmr3000_bus_ops *bops)
    +{
    + const struct cmr3000_platform_data *pdata;
    + struct cmr3000_accl_data *data;
    + struct input_dev *input_dev;
    + int rev;
    + int error;
    +
    + if (!dev->platform_data) {
    + dev_info(dev, "platform data not found, using default\n");
    + pdata = &cmr3000_default_pdata;
    + } else
    + pdata = dev->platform_data;
    +
    + if (!pdata) {
    + dev_err(dev, "platform data not found\n");
    + error = -EINVAL;
    + goto err_out;
    + }
    +
    + /* if no IRQ return error */
    + if (irq == 0) {
    + error = -EINVAL;
    + goto err_out;
    + }
    +
    + data = kzalloc(sizeof(struct cmr3000_accl_data), GFP_KERNEL);
    + input_dev = input_allocate_device();
    + if (!data || !input_dev) {
    + error = -ENOMEM;
    + goto err_free_mem;
    + }
    +
    + data->dev = dev;
    + data->input_dev = input_dev;
    + data->bus_ops = bops;
    + data->pdata = pdata;
    + data->irq = irq;
    + mutex_init(&data->mutex);
    +
    + data->mode = pdata->mode;
    + if ((data->mode != CMRMODE_MEAS80)
    + && (data->mode != CMRMODE_MEAS20)) {
    + data->mode = CMRMODE_MEAS80;
    + dev_warn(dev, "Invalid mode specified, assuming 80Hz\n");
    + }
    +
    + data->irq_level = pdata->irq_level;
    + if ((data->irq_level != CMR3000_INTLOW)
    + && (data->irq_level != CMR3000_INTHIGH)) {
    + data->irq_level = CMR3000_INTHIGH;
    + dev_warn(data->dev,
    + "Invalid int level specified, assuming high\n");
    + }
    +
    + input_dev->name = "cmr3000-gyroscope";
    + input_dev->id.bustype = bops->bustype;
    + input_dev->open = cmr3000_open;
    + input_dev->close = cmr3000_close;
    +
    + __set_bit(EV_ABS, input_dev->evbit);
    +
    + input_set_abs_params(input_dev, ABS_X,
    + -CMRRANGE, CMRRANGE, pdata->fuzz_x, 0);
    + input_set_abs_params(input_dev, ABS_Y,
    + -CMRRANGE, CMRRANGE, pdata->fuzz_y, 0);
    + input_set_abs_params(input_dev, ABS_Z,
    + -CMRRANGE, CMRRANGE, pdata->fuzz_z, 0);
    +
    + input_set_drvdata(input_dev, data);
    +
    + error = cmr3000_reset(data);
    + if (error)
    + goto err_free_mem;
    +
    + rev = CMR3000_READ(data, CMR3000_REVID, "Revid");
    + if (rev < 0) {
    + error = rev;
    + goto err_free_mem;
    + }
    + if (rev != CMR3000_REV) {
    + error = -EINVAL;
    + pr_err("CMR3000 Gyroscope: Unknown Revision %x\n", rev);
    + goto err_free_mem;
    + }
    + pr_info("CMR3000 Gyroscope: Revision %x\n", rev);
    +
    + rev = CMR3000_READ(data, CMR3000_WHOAMI, "WhoamI");
    + if (rev < 0) {
    + error = rev;
    + goto err_free_mem;
    + }
    + pr_info("CMR3000 Gyroscope: WhoamI %x\n", rev);
    +
    + error = request_threaded_irq(irq, NULL, cmr3000_thread_irq,
    + pdata->irqflags | IRQF_ONESHOT,
    + "cmr3000_d0x", data);
    + if (error) {
    + dev_err(dev, "request_threaded_irq failed\n");
    + goto err_free_mem;
    + }
    +
    + error = input_register_device(data->input_dev);
    + if (error) {
    + dev_err(dev, "Unable to register input device\n");
    + goto err_free_irq;
    + }
    +
    + return data;
    +
    +err_free_irq:
    + free_irq(irq, data);
    +err_free_mem:
    + input_free_device(input_dev);
    + kfree(data);
    +err_out:
    + return ERR_PTR(error);
    +}
    +EXPORT_SYMBOL(cmr3000_init);
    +
    +void cmr3000_exit(struct cmr3000_accl_data *data)
    +{
    + free_irq(data->irq, data);
    + input_unregister_device(data->input_dev);
    + kfree(data);
    +}
    +EXPORT_SYMBOL(cmr3000_exit);
    +
    +MODULE_DESCRIPTION("CMR3000-D0x Gyroscope Driver");
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
    diff --git a/drivers/input/misc/cmr3000_d0x.h b/drivers/input/misc/cmr3000_d0x.h
    new file mode 100644
    index 0000000..604c7d4
    --- /dev/null
    +++ b/drivers/input/misc/cmr3000_d0x.h
    @@ -0,0 +1,45 @@
    +/*
    + * VTI CMR3000_D0x Gyroscpe driver
    + *
    + * Copyright (C) 2011 Qtechnology
    + * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
    + *
    + * Based on:
    + * Hemanth V <hemanthv@ti.com>
    + *
    + * 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.
    + *
    + * This program is distributed in the hope that it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    + *
    + * You should have received a copy of the GNU General Public License along with
    + * this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#ifndef _INPUT_CMR3000_H
    +#define _INPUT_CMR3000_H
    +
    +#include <linux/types.h>
    +#include <linux/input.h>
    +
    +struct device;
    +struct cmr3000_accl_data;
    +
    +struct cmr3000_bus_ops {
    + u16 bustype;
    + u8 ctrl_mod;
    + int (*read) (struct device *, u8, char *);
    + int (*write) (struct device *, u8, u8, char *);
    +};
    +
    +struct cmr3000_accl_data *cmr3000_init(struct device *dev, int irq,
    + const struct cmr3000_bus_ops *bops);
    +void cmr3000_exit(struct cmr3000_accl_data *);
    +void cmr3000_suspend(struct cmr3000_accl_data *);
    +void cmr3000_resume(struct cmr3000_accl_data *);
    +
    +#endif
    diff --git a/drivers/input/misc/cmr3000_d0x_spi.c b/drivers/input/misc/cmr3000_d0x_spi.c
    new file mode 100644
    index 0000000..4ec139c
    --- /dev/null
    +++ b/drivers/input/misc/cmr3000_d0x_spi.c
    @@ -0,0 +1,178 @@
    +/*
    + * Implements SPI interface for VTI CMR300_D0x Accelerometer driver
    + *
    + * Copyright (C) 2011 Qtechnology
    + * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com.com>
    + * Based on:
    + * Hemanth V <hemanthv@ti.com>
    + * Michael Hennerich <hennerich@blackfin.uclinux.org>
    + *
    + * 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.
    + *
    + * This program is distributed in the hope that it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    + *
    + * You should have received a copy of the GNU General Public License along with
    + * this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#include <linux/delay.h>
    +#include <linux/module.h>
    +#include <linux/spi/spi.h>
    +#include <linux/input/cmr3000.h>
    +#include "cmr3000_d0x.h"
    +
    +enum { DO_READ = 0, DO_WRITE };
    +
    +static int cmr3000_spi_cmd(struct spi_device *spi, u8 reg, u8 * val, int cmd,
    + char *msg)
    +{
    + int ret;
    + unsigned char tx_buf[2];
    + unsigned char rx_buf[2];
    + struct spi_transfer t = {
    + .rx_buf = rx_buf,
    + .tx_buf = tx_buf,
    + .len = 2,
    + };
    + struct spi_message m;
    +
    + if (cmd == DO_WRITE) {
    + tx_buf[0] = (reg << 2) | 2;
    + tx_buf[1] = *val;
    + } else {
    + tx_buf[0] = reg << 2;
    + tx_buf[1] = 0;
    + }
    + spi_message_init(&m);
    + spi_message_add_tail(&t, &m);
    + ret = spi_sync(spi, &m);
    + if (ret < 0) {
    + dev_err(&spi->dev, "%s failed (%s, %d)\n", __func__, msg, ret);
    + return ret;
    + }
    + if (cmd == DO_READ)
    + *val = rx_buf[1];
    +
    + if (rx_buf[0] & 0x41)
    + dev_err(&spi->dev,
    + "%s Invalid Zero mask(0x%x)\n", __func__, rx_buf[0]);
    +
    + if ((rx_buf[0] & 0x2) != 0x2)
    + dev_err(&spi->dev,
    + "%s Invalid One mask (0x%x)\n", __func__, rx_buf[0]);
    +
    + return 0;
    +}
    +
    +static int cmr3000_spi_set(struct device *dev, u8 reg, u8 val, char *msg)
    +{
    +
    + struct spi_device *spi = to_spi_device(dev);
    +
    + return cmr3000_spi_cmd(spi, reg, &val, DO_WRITE, msg);
    +}
    +
    +static int cmr3000_spi_read(struct device *dev, u8 reg, char *msg)
    +{
    + struct spi_device *spi = to_spi_device(dev);
    + int ret;
    + u8 val;
    +
    + ret = cmr3000_spi_cmd(spi, reg, &val, DO_READ, msg);
    + if (ret)
    + return ret;
    + return val;
    +}
    +
    +static const struct cmr3000_bus_ops cmr3000_spi_bops = {
    + .bustype = BUS_SPI,
    +#define CMR3000_BUSSPI (1 << 4)
    + .ctrl_mod = CMR3000_BUSSPI,
    + .read = cmr3000_spi_read,
    + .write = cmr3000_spi_set,
    +};
    +
    +static int __devinit cmr3000_spi_probe(struct spi_device *spi)
    +{
    + struct cmr3000_accl_data *data;
    +
    + data = cmr3000_init(&spi->dev, spi->irq, &cmr3000_spi_bops);
    + if (IS_ERR(data))
    + return PTR_ERR(data);
    +
    + spi_set_drvdata(spi, data);
    +
    + return 0;
    +}
    +
    +static int __devexit cmr3000_spi_remove(struct spi_device *spi)
    +{
    + struct cmr3000_accl_data *data = dev_get_drvdata(&spi->dev);
    +
    + cmr3000_exit(data);
    +
    + return 0;
    +}
    +
    +#ifdef CONFIG_PM
    +static int cmr3000_spi_suspend(struct device *dev)
    +{
    + struct spi_device *spi = to_spi_device(dev);
    + struct cmr3000_accl_data *data = dev_get_drvdata(&spi->dev);
    +
    + cmr3000_suspend(data);
    +
    + return 0;
    +}
    +
    +static int cmr3000_spi_resume(struct device *dev)
    +{
    + struct spi_device *spi = to_spi_device(dev);
    + struct cmr3000_accl_data *data = dev_get_drvdata(&spi->dev);
    +
    + cmr3000_resume(data);
    +
    + return 0;
    +}
    +
    +static const struct dev_pm_ops cmr3000_spi_pm_ops = {
    + .suspend = cmr3000_spi_suspend,
    + .resume = cmr3000_spi_resume,
    +};
    +#endif
    +
    +static SIMPLE_DEV_PM_OPS(cmr3000_spi_pm, cmr3000_spi_suspend,
    + cmr3000_spi_resume);
    +
    +static struct spi_driver cmr3000_driver = {
    + .driver = {
    + .name = "cmr3000_d01",
    + .bus = &spi_bus_type,
    + .owner = THIS_MODULE,
    + .pm = &cmr3000_spi_pm,
    + },
    + .probe = cmr3000_spi_probe,
    + .remove = __devexit_p(cmr3000_spi_remove),
    +};
    +
    +static int __init cmr3000_spi_init(void)
    +{
    + return spi_register_driver(&cmr3000_driver);
    +}
    +
    +static void __exit cmr3000_spi_exit(void)
    +{
    + spi_unregister_driver(&cmr3000_driver);
    +}
    +
    +module_init(cmr3000_spi_init);
    +module_exit(cmr3000_spi_exit);
    +
    +MODULE_DESCRIPTION("CMR3000-D0x Gyroscope SPI Driver");
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
    diff --git a/include/linux/input/cmr3000.h b/include/linux/input/cmr3000.h
    new file mode 100644
    index 0000000..0202100
    --- /dev/null
    +++ b/include/linux/input/cmr3000.h
    @@ -0,0 +1,54 @@
    +/*
    + * VTI CMR3000_Dxx Gyroscope driver
    + *
    + * Copyright (C) 2011 Qtechnology
    + * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
    + *
    + * Copyright (C) 2010 Texas Instruments
    + * Author: Hemanth V <hemanthv@ti.com>
    + *
    + * 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.
    + *
    + * This program is distributed in the hope that it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    + *
    + * You should have received a copy of the GNU General Public License along with
    + * this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#ifndef _LINUX_CMR3000_H
    +#define _LINUX_CMR3000_H
    +
    +#define CMRMODE_DEFAULT 0
    +#define CMRMODE_STANDBY 1
    +#define CMRMODE_MEAS20 2
    +#define CMRMODE_MEAS80 3
    +#define CMRMODE_POFF 0
    +
    +#define CMRIRQLEVEL_LOW 1
    +#define CMRIRQLEVEL_HIGH 0
    +
    +#define CMRRANGE 3072
    +
    +/**
    + * struct cmr3000_i2c_platform_data - CMR3000 Platform data
    + * @fuzz_x: Noise on X Axis
    + * @fuzz_y: Noise on Y Axis
    + * @fuzz_z: Noise on Z Axis
    + * @mode: Operating mode
    + * @irq_level: Irq level
    + */
    +struct cmr3000_platform_data {
    + int fuzz_x;
    + int fuzz_y;
    + int fuzz_z;
    + uint8_t irq_level;
    + uint8_t mode;
    + unsigned long irqflags;
    +};
    +
    +#endif
    --
    1.7.7


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