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path: root/drivers/misc/inv_mpu/accel/lis331.c
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Diffstat (limited to 'drivers/misc/inv_mpu/accel/lis331.c')
-rw-r--r--drivers/misc/inv_mpu/accel/lis331.c740
1 files changed, 740 insertions, 0 deletions
diff --git a/drivers/misc/inv_mpu/accel/lis331.c b/drivers/misc/inv_mpu/accel/lis331.c
new file mode 100644
index 0000000..adf33e5
--- /dev/null
+++ b/drivers/misc/inv_mpu/accel/lis331.c
@@ -0,0 +1,740 @@
+/*
+ $License:
+ Copyright (C) 2011 InvenSense Corporation, All Rights Reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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/>.
+ $
+ */
+
+/**
+ * @addtogroup ACCELDL
+ * @brief Provides the interface to setup and handle an accelerometer.
+ *
+ * @{
+ * @file lis331.c
+ * @brief Accelerometer setup and handling methods for ST LIS331DLH.
+ */
+
+/* -------------------------------------------------------------------------- */
+
+#undef MPL_LOG_NDEBUG
+#define MPL_LOG_NDEBUG 1
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include "mpu-dev.h"
+
+#include <log.h>
+#include <linux/mpu.h>
+#include "mlsl.h"
+#include "mldl_cfg.h"
+#undef MPL_LOG_TAG
+#define MPL_LOG_TAG "MPL-acc"
+
+/* full scale setting - register & mask */
+#define LIS331_CTRL_REG1 (0x20)
+#define LIS331_CTRL_REG2 (0x21)
+#define LIS331_CTRL_REG3 (0x22)
+#define LIS331_CTRL_REG4 (0x23)
+#define LIS331_CTRL_REG5 (0x24)
+#define LIS331_HP_FILTER_RESET (0x25)
+#define LIS331_REFERENCE (0x26)
+#define LIS331_STATUS_REG (0x27)
+#define LIS331_OUT_X_L (0x28)
+#define LIS331_OUT_X_H (0x29)
+#define LIS331_OUT_Y_L (0x2a)
+#define LIS331_OUT_Y_H (0x2b)
+#define LIS331_OUT_Z_L (0x2b)
+#define LIS331_OUT_Z_H (0x2d)
+
+#define LIS331_INT1_CFG (0x30)
+#define LIS331_INT1_SRC (0x31)
+#define LIS331_INT1_THS (0x32)
+#define LIS331_INT1_DURATION (0x33)
+
+#define LIS331_INT2_CFG (0x34)
+#define LIS331_INT2_SRC (0x35)
+#define LIS331_INT2_THS (0x36)
+#define LIS331_INT2_DURATION (0x37)
+
+#define LIS331_CTRL_MASK (0x30)
+#define LIS331_SLEEP_MASK (0x20)
+
+#define LIS331_MAX_DUR (0x7F)
+
+/* -------------------------------------------------------------------------- */
+
+struct lis331dlh_config {
+ unsigned int odr;
+ unsigned int fsr; /* full scale range mg */
+ unsigned int ths; /* Motion no-motion thseshold mg */
+ unsigned int dur; /* Motion no-motion duration ms */
+ unsigned char reg_ths;
+ unsigned char reg_dur;
+ unsigned char ctrl_reg1;
+ unsigned char irq_type;
+ unsigned char mot_int1_cfg;
+};
+
+struct lis331dlh_private_data {
+ struct lis331dlh_config suspend;
+ struct lis331dlh_config resume;
+};
+
+/* -------------------------------------------------------------------------- */
+static int lis331dlh_set_ths(void *mlsl_handle,
+ struct ext_slave_platform_data *pdata,
+ struct lis331dlh_config *config,
+ int apply, long ths)
+{
+ int result = INV_SUCCESS;
+ if ((unsigned int)ths >= config->fsr)
+ ths = (long)config->fsr - 1;
+
+ if (ths < 0)
+ ths = 0;
+
+ config->ths = ths;
+ config->reg_ths = (unsigned char)(long)((ths * 128L) / (config->fsr));
+ MPL_LOGV("THS: %d, 0x%02x\n", config->ths, (int)config->reg_ths);
+ if (apply)
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_THS,
+ config->reg_ths);
+ return result;
+}
+
+static int lis331dlh_set_dur(void *mlsl_handle,
+ struct ext_slave_platform_data *pdata,
+ struct lis331dlh_config *config,
+ int apply, long dur)
+{
+ int result = INV_SUCCESS;
+ long reg_dur = (dur * config->odr) / 1000000L;
+ config->dur = dur;
+
+ if (reg_dur > LIS331_MAX_DUR)
+ reg_dur = LIS331_MAX_DUR;
+
+ config->reg_dur = (unsigned char)reg_dur;
+ MPL_LOGV("DUR: %d, 0x%02x\n", config->dur, (int)config->reg_dur);
+ if (apply)
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_DURATION,
+ (unsigned char)reg_dur);
+ return result;
+}
+
+/**
+ * Sets the IRQ to fire when one of the IRQ events occur. Threshold and
+ * duration will not be used uless the type is MOT or NMOT.
+ *
+ * @param config configuration to apply to, suspend or resume
+ * @param irq_type The type of IRQ. Valid values are
+ * - MPU_SLAVE_IRQ_TYPE_NONE
+ * - MPU_SLAVE_IRQ_TYPE_MOTION
+ * - MPU_SLAVE_IRQ_TYPE_DATA_READY
+ */
+static int lis331dlh_set_irq(void *mlsl_handle,
+ struct ext_slave_platform_data *pdata,
+ struct lis331dlh_config *config,
+ int apply, long irq_type)
+{
+ int result = INV_SUCCESS;
+ unsigned char reg1;
+ unsigned char reg2;
+
+ config->irq_type = (unsigned char)irq_type;
+ if (irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
+ reg1 = 0x02;
+ reg2 = 0x00;
+ } else if (irq_type == MPU_SLAVE_IRQ_TYPE_MOTION) {
+ reg1 = 0x00;
+ reg2 = config->mot_int1_cfg;
+ } else {
+ reg1 = 0x00;
+ reg2 = 0x00;
+ }
+
+ if (apply) {
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG3, reg1);
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_CFG, reg2);
+ }
+
+ return result;
+}
+
+/**
+ * Set the Output data rate for the particular configuration
+ *
+ * @param config Config to modify with new ODR
+ * @param odr Output data rate in units of 1/1000Hz
+ */
+static int lis331dlh_set_odr(void *mlsl_handle,
+ struct ext_slave_platform_data *pdata,
+ struct lis331dlh_config *config,
+ int apply, long odr)
+{
+ unsigned char bits;
+ int result = INV_SUCCESS;
+
+ if (odr > 400000) {
+ config->odr = 1000000;
+ bits = 0x38;
+ } else if (odr > 100000) {
+ config->odr = 400000;
+ bits = 0x30;
+ } else if (odr > 50000) {
+ config->odr = 100000;
+ bits = 0x28;
+ } else if (odr > 10000) {
+ config->odr = 50000;
+ bits = 0x20;
+ } else if (odr > 5000) {
+ config->odr = 10000;
+ bits = 0xC0;
+ } else if (odr > 2000) {
+ config->odr = 5000;
+ bits = 0xB0;
+ } else if (odr > 1000) {
+ config->odr = 2000;
+ bits = 0x80;
+ } else if (odr > 500) {
+ config->odr = 1000;
+ bits = 0x60;
+ } else if (odr > 0) {
+ config->odr = 500;
+ bits = 0x40;
+ } else {
+ config->odr = 0;
+ bits = 0;
+ }
+
+ config->ctrl_reg1 = bits | (config->ctrl_reg1 & 0x7);
+ lis331dlh_set_dur(mlsl_handle, pdata, config, apply, config->dur);
+ MPL_LOGV("ODR: %d, 0x%02x\n", config->odr, (int)config->ctrl_reg1);
+ if (apply)
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG1,
+ config->ctrl_reg1);
+ return result;
+}
+
+/**
+ * Set the full scale range of the accels
+ *
+ * @param config pointer to configuration
+ * @param fsr requested full scale range
+ */
+static int lis331dlh_set_fsr(void *mlsl_handle,
+ struct ext_slave_platform_data *pdata,
+ struct lis331dlh_config *config,
+ int apply, long fsr)
+{
+ unsigned char reg1 = 0x40;
+ int result = INV_SUCCESS;
+
+ if (fsr <= 2048) {
+ config->fsr = 2048;
+ } else if (fsr <= 4096) {
+ reg1 |= 0x30;
+ config->fsr = 4096;
+ } else {
+ reg1 |= 0x10;
+ config->fsr = 8192;
+ }
+
+ lis331dlh_set_ths(mlsl_handle, pdata, config, apply, config->ths);
+ MPL_LOGV("FSR: %d\n", config->fsr);
+ if (apply)
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG4, reg1);
+
+ return result;
+}
+
+static int lis331dlh_suspend(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ int result = INV_SUCCESS;
+ unsigned char reg1;
+ unsigned char reg2;
+ struct lis331dlh_private_data *private_data =
+ (struct lis331dlh_private_data *)(pdata->private_data);
+
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG1,
+ private_data->suspend.ctrl_reg1);
+
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG2, 0x0f);
+ reg1 = 0x40;
+ if (private_data->suspend.fsr == 8192)
+ reg1 |= 0x30;
+ else if (private_data->suspend.fsr == 4096)
+ reg1 |= 0x10;
+ /* else bits [4..5] are already zero */
+
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG4, reg1);
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_THS,
+ private_data->suspend.reg_ths);
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_DURATION,
+ private_data->suspend.reg_dur);
+
+ if (private_data->suspend.irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
+ reg1 = 0x02;
+ reg2 = 0x00;
+ } else if (private_data->suspend.irq_type ==
+ MPU_SLAVE_IRQ_TYPE_MOTION) {
+ reg1 = 0x00;
+ reg2 = private_data->suspend.mot_int1_cfg;
+ } else {
+ reg1 = 0x00;
+ reg2 = 0x00;
+ }
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG3, reg1);
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_CFG, reg2);
+ result = inv_serial_read(mlsl_handle, pdata->address,
+ LIS331_HP_FILTER_RESET, 1, &reg1);
+ return result;
+}
+
+static int lis331dlh_resume(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ int result = INV_SUCCESS;
+ unsigned char reg1;
+ unsigned char reg2;
+ struct lis331dlh_private_data *private_data =
+ (struct lis331dlh_private_data *)(pdata->private_data);
+
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG1,
+ private_data->resume.ctrl_reg1);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ msleep(6);
+
+ /* Full Scale */
+ reg1 = 0x40;
+ if (private_data->resume.fsr == 8192)
+ reg1 |= 0x30;
+ else if (private_data->resume.fsr == 4096)
+ reg1 |= 0x10;
+
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG4, reg1);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+
+ /* Configure high pass filter */
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG2, 0x0F);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+
+ if (private_data->resume.irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) {
+ reg1 = 0x02;
+ reg2 = 0x00;
+ } else if (private_data->resume.irq_type == MPU_SLAVE_IRQ_TYPE_MOTION) {
+ reg1 = 0x00;
+ reg2 = private_data->resume.mot_int1_cfg;
+ } else {
+ reg1 = 0x00;
+ reg2 = 0x00;
+ }
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_CTRL_REG3, reg1);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_THS,
+ private_data->resume.reg_ths);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_DURATION,
+ private_data->resume.reg_dur);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ result = inv_serial_single_write(mlsl_handle, pdata->address,
+ LIS331_INT1_CFG, reg2);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ result = inv_serial_read(mlsl_handle, pdata->address,
+ LIS331_HP_FILTER_RESET, 1, &reg1);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ return result;
+}
+
+static int lis331dlh_read(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata,
+ unsigned char *data)
+{
+ int result = INV_SUCCESS;
+ result = inv_serial_read(mlsl_handle, pdata->address,
+ LIS331_STATUS_REG, 1, data);
+ if (data[0] & 0x0F) {
+ result = inv_serial_read(mlsl_handle, pdata->address,
+ slave->read_reg, slave->read_len,
+ data);
+ return result;
+ } else
+ return INV_ERROR_ACCEL_DATA_NOT_READY;
+}
+
+static int lis331dlh_init(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ struct lis331dlh_private_data *private_data;
+ long range;
+ private_data = (struct lis331dlh_private_data *)
+ kzalloc(sizeof(struct lis331dlh_private_data), GFP_KERNEL);
+
+ if (!private_data)
+ return INV_ERROR_MEMORY_EXAUSTED;
+
+ pdata->private_data = private_data;
+
+ private_data->resume.ctrl_reg1 = 0x37;
+ private_data->suspend.ctrl_reg1 = 0x47;
+ private_data->resume.mot_int1_cfg = 0x95;
+ private_data->suspend.mot_int1_cfg = 0x2a;
+
+ lis331dlh_set_odr(mlsl_handle, pdata, &private_data->suspend, FALSE, 0);
+ lis331dlh_set_odr(mlsl_handle, pdata, &private_data->resume,
+ FALSE, 200000);
+
+ range = range_fixedpoint_to_long_mg(slave->range);
+ lis331dlh_set_fsr(mlsl_handle, pdata, &private_data->suspend,
+ FALSE, range);
+ lis331dlh_set_fsr(mlsl_handle, pdata, &private_data->resume,
+ FALSE, range);
+
+ lis331dlh_set_ths(mlsl_handle, pdata, &private_data->suspend,
+ FALSE, 80);
+ lis331dlh_set_ths(mlsl_handle, pdata, &private_data->resume, FALSE, 40);
+
+
+ lis331dlh_set_dur(mlsl_handle, pdata, &private_data->suspend,
+ FALSE, 1000);
+ lis331dlh_set_dur(mlsl_handle, pdata, &private_data->resume,
+ FALSE, 2540);
+
+ lis331dlh_set_irq(mlsl_handle, pdata, &private_data->suspend,
+ FALSE, MPU_SLAVE_IRQ_TYPE_NONE);
+ lis331dlh_set_irq(mlsl_handle, pdata, &private_data->resume,
+ FALSE, MPU_SLAVE_IRQ_TYPE_NONE);
+ return INV_SUCCESS;
+}
+
+static int lis331dlh_exit(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ kfree(pdata->private_data);
+ return INV_SUCCESS;
+}
+
+static int lis331dlh_config(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata,
+ struct ext_slave_config *data)
+{
+ struct lis331dlh_private_data *private_data = pdata->private_data;
+ if (!data->data)
+ return INV_ERROR_INVALID_PARAMETER;
+
+ switch (data->key) {
+ case MPU_SLAVE_CONFIG_ODR_SUSPEND:
+ return lis331dlh_set_odr(mlsl_handle, pdata,
+ &private_data->suspend,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_ODR_RESUME:
+ return lis331dlh_set_odr(mlsl_handle, pdata,
+ &private_data->resume,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_FSR_SUSPEND:
+ return lis331dlh_set_fsr(mlsl_handle, pdata,
+ &private_data->suspend,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_FSR_RESUME:
+ return lis331dlh_set_fsr(mlsl_handle, pdata,
+ &private_data->resume,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_MOT_THS:
+ return lis331dlh_set_ths(mlsl_handle, pdata,
+ &private_data->suspend,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_NMOT_THS:
+ return lis331dlh_set_ths(mlsl_handle, pdata,
+ &private_data->resume,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_MOT_DUR:
+ return lis331dlh_set_dur(mlsl_handle, pdata,
+ &private_data->suspend,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_NMOT_DUR:
+ return lis331dlh_set_dur(mlsl_handle, pdata,
+ &private_data->resume,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_IRQ_SUSPEND:
+ return lis331dlh_set_irq(mlsl_handle, pdata,
+ &private_data->suspend,
+ data->apply, *((long *)data->data));
+ case MPU_SLAVE_CONFIG_IRQ_RESUME:
+ return lis331dlh_set_irq(mlsl_handle, pdata,
+ &private_data->resume,
+ data->apply, *((long *)data->data));
+ default:
+ LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED);
+ return INV_ERROR_FEATURE_NOT_IMPLEMENTED;
+ };
+
+ return INV_SUCCESS;
+}
+
+static int lis331dlh_get_config(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata,
+ struct ext_slave_config *data)
+{
+ struct lis331dlh_private_data *private_data = pdata->private_data;
+ if (!data->data)
+ return INV_ERROR_INVALID_PARAMETER;
+
+ switch (data->key) {
+ case MPU_SLAVE_CONFIG_ODR_SUSPEND:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->suspend.odr;
+ break;
+ case MPU_SLAVE_CONFIG_ODR_RESUME:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->resume.odr;
+ break;
+ case MPU_SLAVE_CONFIG_FSR_SUSPEND:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->suspend.fsr;
+ break;
+ case MPU_SLAVE_CONFIG_FSR_RESUME:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->resume.fsr;
+ break;
+ case MPU_SLAVE_CONFIG_MOT_THS:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->suspend.ths;
+ break;
+ case MPU_SLAVE_CONFIG_NMOT_THS:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->resume.ths;
+ break;
+ case MPU_SLAVE_CONFIG_MOT_DUR:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->suspend.dur;
+ break;
+ case MPU_SLAVE_CONFIG_NMOT_DUR:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->resume.dur;
+ break;
+ case MPU_SLAVE_CONFIG_IRQ_SUSPEND:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->suspend.irq_type;
+ break;
+ case MPU_SLAVE_CONFIG_IRQ_RESUME:
+ (*(unsigned long *)data->data) =
+ (unsigned long)private_data->resume.irq_type;
+ break;
+ default:
+ LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED);
+ return INV_ERROR_FEATURE_NOT_IMPLEMENTED;
+ };
+
+ return INV_SUCCESS;
+}
+
+static struct ext_slave_descr lis331dlh_descr = {
+ .init = lis331dlh_init,
+ .exit = lis331dlh_exit,
+ .suspend = lis331dlh_suspend,
+ .resume = lis331dlh_resume,
+ .read = lis331dlh_read,
+ .config = lis331dlh_config,
+ .get_config = lis331dlh_get_config,
+ .name = "lis331dlh",
+ .type = EXT_SLAVE_TYPE_ACCELEROMETER,
+ .id = ACCEL_ID_LIS331,
+ .read_reg = (0x28 | 0x80), /* 0x80 for burst reads */
+ .read_len = 6,
+ .endian = EXT_SLAVE_BIG_ENDIAN,
+ .range = {2, 480},
+ .trigger = NULL,
+};
+
+static
+struct ext_slave_descr *lis331_get_slave_descr(void)
+{
+ return &lis331dlh_descr;
+}
+
+/* -------------------------------------------------------------------------- */
+struct lis331_mod_private_data {
+ struct i2c_client *client;
+ struct ext_slave_platform_data *pdata;
+};
+
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+static int lis331_mod_probe(struct i2c_client *client,
+ const struct i2c_device_id *devid)
+{
+ struct ext_slave_platform_data *pdata;
+ struct lis331_mod_private_data *private_data;
+ int result = 0;
+
+ dev_info(&client->adapter->dev, "%s: %s\n", __func__, devid->name);
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ result = -ENODEV;
+ goto out_no_free;
+ }
+
+ pdata = client->dev.platform_data;
+ if (!pdata) {
+ dev_err(&client->adapter->dev,
+ "Missing platform data for slave %s\n", devid->name);
+ result = -EFAULT;
+ goto out_no_free;
+ }
+
+ private_data = kzalloc(sizeof(*private_data), GFP_KERNEL);
+ if (!private_data) {
+ result = -ENOMEM;
+ goto out_no_free;
+ }
+
+ i2c_set_clientdata(client, private_data);
+ private_data->client = client;
+ private_data->pdata = pdata;
+
+ result = inv_mpu_register_slave(THIS_MODULE, client, pdata,
+ lis331_get_slave_descr);
+ if (result) {
+ dev_err(&client->adapter->dev,
+ "Slave registration failed: %s, %d\n",
+ devid->name, result);
+ goto out_free_memory;
+ }
+
+ return result;
+
+out_free_memory:
+ kfree(private_data);
+out_no_free:
+ dev_err(&client->adapter->dev, "%s failed %d\n", __func__, result);
+ return result;
+
+}
+
+static int lis331_mod_remove(struct i2c_client *client)
+{
+ struct lis331_mod_private_data *private_data =
+ i2c_get_clientdata(client);
+
+ dev_dbg(&client->adapter->dev, "%s\n", __func__);
+
+ inv_mpu_unregister_slave(client, private_data->pdata,
+ lis331_get_slave_descr);
+
+ kfree(private_data);
+ return 0;
+}
+
+static const struct i2c_device_id lis331_mod_id[] = {
+ { "lis331", ACCEL_ID_LIS331 },
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lis331_mod_id);
+
+static struct i2c_driver lis331_mod_driver = {
+ .class = I2C_CLASS_HWMON,
+ .probe = lis331_mod_probe,
+ .remove = lis331_mod_remove,
+ .id_table = lis331_mod_id,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "lis331_mod",
+ },
+ .address_list = normal_i2c,
+};
+
+static int __init lis331_mod_init(void)
+{
+ int res = i2c_add_driver(&lis331_mod_driver);
+ pr_info("%s: Probe name %s\n", __func__, "lis331_mod");
+ if (res)
+ pr_err("%s failed\n", __func__);
+ return res;
+}
+
+static void __exit lis331_mod_exit(void)
+{
+ pr_info("%s\n", __func__);
+ i2c_del_driver(&lis331_mod_driver);
+}
+
+module_init(lis331_mod_init);
+module_exit(lis331_mod_exit);
+
+MODULE_AUTHOR("Invensense Corporation");
+MODULE_DESCRIPTION("Driver to integrate LIS331 sensor with the MPU");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("lis331_mod");
+
+/**
+ * @}
+ */