/* drivers/input/sensors/access/kxtik.c
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*
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* Copyright (C) 2012-2015 ROCKCHIP.
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* Author: luowei <lw@rock-chips.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/gpio.h>
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#include <linux/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/delay.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/freezer.h>
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#include <linux/of_gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/l3g4200d.h>
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#include <linux/sensor-dev.h>
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#define L3G4200D_ENABLE 0x08
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/****************operate according to sensor chip:start************/
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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//register setting according to chip datasheet
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if(enable)
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{
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status = L3G4200D_ENABLE; //l3g4200d
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sensor->ops->ctrl_data |= status;
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}
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else
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{
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status = ~L3G4200D_ENABLE; //l3g4200d
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sensor->ops->ctrl_data &= status;
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}
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DBG("%s:reg=0x%x,reg_ctrl=0x%x,enable=%d\n",__func__,sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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printk("%s:fail to active sensor\n",__func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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int result = 0;
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unsigned char buf[5];
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unsigned char data = 0;
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int i = 0;
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result = sensor->ops->active(client,0,0);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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buf[0] = 0x07; //27
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buf[1] = 0x00;
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buf[2] = 0x00;
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buf[3] = 0x20; //0x00
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buf[4] = 0x00;
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for(i=0; i<5; i++)
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{
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result = sensor_write_reg(client, sensor->ops->ctrl_reg+i, buf[i]);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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}
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result = sensor_read_reg(client, sensor->ops->ctrl_reg);
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if (result >= 0)
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data = result & 0x000F;
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sensor->ops->ctrl_data = data + ODR100_BW12_5;
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, sensor->ops->ctrl_data);
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if(result)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return result;
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}
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return result;
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}
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static int gyro_report_value(struct i2c_client *client, struct sensor_axis *axis)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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if (sensor->status_cur == SENSOR_ON) {
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/* Report GYRO information */
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input_report_rel(sensor->input_dev, ABS_RX, axis->x);
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input_report_rel(sensor->input_dev, ABS_RY, axis->y);
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input_report_rel(sensor->input_dev, ABS_RZ, axis->z);
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input_sync(sensor->input_dev);
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}
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return 0;
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}
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *) i2c_get_clientdata(client);
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struct sensor_platform_data *pdata = sensor->pdata;
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int ret = 0;
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int x = 0, y = 0, z = 0;
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struct sensor_axis axis;
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char buffer[6] = {0};
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int i = 0;
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int value = 0;
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if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
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{
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printk("%s:lenth is error,len=%d\n",__func__,sensor->ops->read_len);
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return -1;
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}
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memset(buffer, 0, 6);
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#if 0
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/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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do {
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buffer[0] = sensor->ops->read_reg;
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ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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if (ret < 0)
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return ret;
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} while (0);
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#else
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for(i=0; i<6; i++)
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{
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//buffer[i] = sensor->ops->read_reg + i;
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buffer[i] = sensor_read_reg(client, sensor->ops->read_reg + i);
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}
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#endif
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x = (short) (((buffer[1]) << 8) | buffer[0]);
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y = (short) (((buffer[3]) << 8) | buffer[2]);
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z = (short) (((buffer[5]) << 8) | buffer[4]);
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DBG("%s: x=%d y=%d z=%d \n",__func__, x,y,z);
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if (pdata)
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{
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axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
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axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
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axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
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}
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else
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{
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axis.x = x;
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axis.y = y;
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axis.z = z;
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}
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gyro_report_value(client, &axis);
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mutex_lock(&sensor->data_mutex);
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sensor->axis = axis;
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mutex_unlock(&sensor->data_mutex);
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:sensor int status :0x%x\n",__func__,value);
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}
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return ret;
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}
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static struct sensor_operate gyro_l3g4200d_ops = {
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.name = "l3g4200d",
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.type = SENSOR_TYPE_GYROSCOPE,
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.id_i2c = GYRO_ID_L3G4200D,
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.read_reg = GYRO_DATA_REG,
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.read_len = 6,
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.id_reg = GYRO_WHO_AM_I,
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.id_data = GYRO_DEVID_L3G4200D,
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.precision = 16,
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.ctrl_reg = GYRO_CTRL_REG1,
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.int_status_reg = GYRO_INT_SRC,
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.range = {-32768, 32768},
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.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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/****************operate according to sensor chip:end************/
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static int gyro_l3g4200d_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &gyro_l3g4200d_ops);
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}
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static int gyro_l3g4200d_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gyro_l3g4200d_ops);
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}
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static const struct i2c_device_id gyro_l3g4200d_id[] = {
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{"l3g4200d_gyro", GYRO_ID_L3G4200D},
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{}
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};
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static struct i2c_driver gyro_l3g4200d_driver = {
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.probe = gyro_l3g4200d_probe,
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.remove = gyro_l3g4200d_remove,
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.shutdown = sensor_shutdown,
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.id_table = gyro_l3g4200d_id,
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.driver = {
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.name = "gyro_l3g4200d",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(gyro_l3g4200d_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("l3g4200d 3-Axis Gyroscope driver");
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MODULE_LICENSE("GPL");
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