/* drivers/input/sensors/access/mma8452.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/sensor-dev.h>
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/* Default register settings */
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#define RBUFF_SIZE 12 /* Rx buffer size */
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#define MMA8452_REG_STATUS 0x0 //RO
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#define MMA8452_REG_X_OUT_MSB 0x1 //RO
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#define MMA8452_REG_X_OUT_LSB 0x2 //RO
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#define MMA8452_REG_Y_OUT_MSB 0x3 //RO
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#define MMA8452_REG_Y_OUT_LSB 0x4 //RO
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#define MMA8452_REG_Z_OUT_MSB 0x5 //RO
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#define MMA8452_REG_Z_OUT_LSB 0x6 //RO
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#define MMA8452_REG_F_SETUP 0x9 //RW
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#define MMA8452_REG_SYSMOD 0xB //RO
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#define MMA8452_REG_INTSRC 0xC //RO
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#define MMA8452_REG_WHO_AM_I 0xD //RO
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#define MMA8452_REG_XYZ_DATA_CFG 0xE //RW
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#define MMA8452_REG_HP_FILTER_CUTOFF 0xF //RW
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#define MMA8452_REG_PL_STATUS 0x10 //RO
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#define MMA8452_REG_PL_CFG 0x11 //RW
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#define MMA8452_REG_PL_COUNT 0x12 //RW
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#define MMA8452_REG_PL_BF_ZCOMP 0x13 //RW
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#define MMA8452_REG_P_L_THS_REG 0x14 //RW
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#define MMA8452_REG_FF_MT_CFG 0x15 //RW
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#define MMA8452_REG_FF_MT_SRC 0x16 //RO
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#define MMA8452_REG_FF_MT_THS 0x17 //RW
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#define MMA8452_REG_FF_MT_COUNT 0x18 //RW
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#define MMA8452_REG_TRANSIENT_CFG 0x1D //RW
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#define MMA8452_REG_TRANSIENT_SRC 0x1E //RO
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#define MMA8452_REG_TRANSIENT_THS 0x1F //RW
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#define MMA8452_REG_TRANSIENT_COUNT 0x20 //RW
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#define MMA8452_REG_PULSE_CFG 0x21 //RW
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#define MMA8452_REG_PULSE_SRC 0x22 //RO
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#define MMA8452_REG_PULSE_THSX 0x23 //RW
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#define MMA8452_REG_PULSE_THSY 0x24 //RW
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#define MMA8452_REG_PULSE_THSZ 0x25 //RW
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#define MMA8452_REG_PULSE_TMLT 0x26 //RW
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#define MMA8452_REG_PULSE_LTCY 0x27 //RW
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#define MMA8452_REG_PULSE_WIND 0x28 //RW
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#define MMA8452_REG_ASLP_COUNT 0x29 //RW
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#define MMA8452_REG_CTRL_REG1 0x2A //RW
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#define MMA8452_REG_CTRL_REG2 0x2B //RW
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#define MMA8452_REG_CTRL_REG3 0x2C //RW
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#define MMA8452_REG_CTRL_REG4 0x2D //RW
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#define MMA8452_REG_CTRL_REG5 0x2E //RW
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#define MMA8452_REG_OFF_X 0x2F //RW
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#define MMA8452_REG_OFF_Y 0x30 //RW
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#define MMA8452_REG_OFF_Z 0x31 //RW
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/*rate*/
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#define MMA8452_RATE_800 0
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#define MMA8452_RATE_400 1
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#define MMA8452_RATE_200 2
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#define MMA8452_RATE_100 3
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#define MMA8452_RATE_50 4
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#define MMA8452_RATE_12P5 5
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#define MMA8452_RATE_6P25 6
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#define MMA8452_RATE_1P56 7
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#define MMA8452_RATE_SHIFT 3
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#define MMA8452_ASLP_RATE_50 0
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#define MMA8452_ASLP_RATE_12P5 1
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#define MMA8452_ASLP_RATE_6P25 2
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#define MMA8452_ASLP_RATE_1P56 3
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#define MMA8452_ASLP_RATE_SHIFT 6
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/*Auto-adapt mma845x series*/
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/*Modified by Yick @ROCKCHIP
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xieyi@rockchips.com*/
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/*
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Range: unit(ug 1g=1 000 000 ug)
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option(2g,4g,8g)
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G would be defined on android HAL
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Precision: bit wide of valid data
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Boundary: Max positive count
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Gravity_step: gravity value indicated by per count
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*/
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#define FREAD_MASK 0 /* enabled(1<<1) only if reading MSB 8bits*/
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#define MMA845X_RANGE (16384 * 2)
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/* mma8451 */
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#define MMA8451_PRECISION 14
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#define MMA8451_BOUNDARY (0x1 << (MMA8451_PRECISION - 1))
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#define MMA8451_GRAVITY_STEP (MMA845X_RANGE / MMA8451_BOUNDARY)
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/* mma8452 */
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#define MMA8452_PRECISION 12
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#define MMA8452_BOUNDARY (0x1 << (MMA8452_PRECISION - 1))
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#define MMA8452_GRAVITY_STEP (MMA845X_RANGE / MMA8452_BOUNDARY)
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/* mma8453 */
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#define MMA8453_PRECISION 10
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#define MMA8453_BOUNDARY (0x1 << (MMA8453_PRECISION - 1))
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#define MMA8453_GRAVITY_STEP (MMA845X_RANGE / MMA8453_BOUNDARY)
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/* mma8653 */
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#define MMA8653_PRECISION 10
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#define MMA8653_BOUNDARY (0x1 << (MMA8653_PRECISION - 1))
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#define MMA8653_GRAVITY_STEP (MMA845X_RANGE / MMA8653_BOUNDARY)
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#define MMA8451_DEVID 0x1a
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#define MMA8452_DEVID 0x2a
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#define MMA8453_DEVID 0x3a
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#define MMA8653_DEVID 0x5a
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#define MMA8452_ENABLE 1
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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 = MMA8452_ENABLE; //mma8452
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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 = ~MMA8452_ENABLE; //mma8452
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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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int tmp;
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int ret = 0;
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int i = 0;
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unsigned char id_reg = MMA8452_REG_WHO_AM_I;
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unsigned char id_data = 0;
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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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ret = sensor->ops->active(client,0,0);
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if(ret)
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{
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printk("%s:line=%d,error\n",__func__,__LINE__);
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return ret;
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}
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sensor->status_cur = SENSOR_OFF;
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for(i=0; i<3; i++)
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{
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ret = sensor_rx_data(client, &id_reg, 1);
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id_data = id_reg;
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if(!ret)
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break;
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}
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if(ret)
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{
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printk("%s:fail to read id,ret=%d\n",__func__, ret);
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return ret;
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}
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sensor->devid = id_data;
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/* disable FIFO FMODE = 0*/
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ret = sensor_write_reg(client,MMA8452_REG_F_SETUP,0);
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DBG("%s: MMA8452_REG_F_SETUP:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_F_SETUP));
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/* set full scale range to 2g */
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ret = sensor_write_reg(client,MMA8452_REG_XYZ_DATA_CFG,0);
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DBG("%s: MMA8452_REG_XYZ_DATA_CFG:%x\n",__func__, sensor_read_reg(client,MMA8452_REG_XYZ_DATA_CFG));
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/* set bus 8bit/14bit(FREAD = 1,FMODE = 0) ,data rate*/
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tmp = (MMA8452_RATE_12P5<< MMA8452_RATE_SHIFT) | FREAD_MASK;
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ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG1,tmp);
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sensor->ops->ctrl_data = tmp;
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DBG("mma8452 MMA8452_REG_CTRL_REG1:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG1));
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DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
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ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG3,5);
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DBG("mma8452 MMA8452_REG_CTRL_REG3:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG3));
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ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG4,1);
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DBG("mma8452 MMA8452_REG_CTRL_REG4:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG4));
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ret = sensor_write_reg(client,MMA8452_REG_CTRL_REG5,1);
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DBG("mma8452 MMA8452_REG_CTRL_REG5:%x\n",sensor_read_reg(client,MMA8452_REG_CTRL_REG5));
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DBG("mma8452 MMA8452_REG_SYSMOD:%x\n",sensor_read_reg(client,MMA8452_REG_SYSMOD));
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return ret;
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}
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static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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{
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s64 result;
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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 precision = sensor->ops->precision;
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switch (sensor->devid) {
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case MMA8451_DEVID:
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swap(high_byte,low_byte);
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result = ((int)high_byte << (MMA8451_PRECISION-8))
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| ((int)low_byte >> (16-MMA8451_PRECISION));
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if (result < MMA8451_BOUNDARY)
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result = result * MMA8451_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - MMA8451_PRECISION))) + 1)
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* MMA8451_GRAVITY_STEP) + 1;
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break;
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case MMA8452_DEVID:
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swap(high_byte,low_byte);
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result = ((int)high_byte << (MMA8452_PRECISION-8))
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| ((int)low_byte >> (16-MMA8452_PRECISION));
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if (result < MMA8452_BOUNDARY)
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result = result * MMA8452_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - MMA8452_PRECISION))) + 1)
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* MMA8452_GRAVITY_STEP) + 1;
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break;
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case MMA8453_DEVID:
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swap(high_byte,low_byte);
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result = ((int)high_byte << (MMA8453_PRECISION-8))
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| ((int)low_byte >> (16-MMA8453_PRECISION));
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if (result < MMA8453_BOUNDARY)
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result = result * MMA8453_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - MMA8453_PRECISION))) + 1)
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* MMA8453_GRAVITY_STEP) + 1;
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break;
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case MMA8653_DEVID:
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swap(high_byte,low_byte);
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result = ((int)high_byte << (MMA8653_PRECISION-8))
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| ((int)low_byte >> (16-MMA8653_PRECISION));
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if (result < MMA8653_BOUNDARY)
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result = result * MMA8653_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - MMA8653_PRECISION))) + 1)
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* MMA8653_GRAVITY_STEP) + 1;
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break;
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default:
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printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
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return -EFAULT;
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}
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return (int)result;
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}
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static int gsensor_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 acceleration sensor information */
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input_report_abs(sensor->input_dev, ABS_X, axis->x);
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input_report_abs(sensor->input_dev, ABS_Y, axis->y);
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input_report_abs(sensor->input_dev, ABS_Z, 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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#define GSENSOR_MIN 10
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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,y,z;
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struct sensor_axis axis;
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char buffer[6] = {0};
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char 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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/* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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do {
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*buffer = 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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//this gsensor need 6 bytes buffer
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x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
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y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
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z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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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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gsensor_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 gsensor_mma8452_ops = {
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.name = "mma8452",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_MMA845X,
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.read_reg = MMA8452_REG_X_OUT_MSB,
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.read_len = 6,
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.id_reg = SENSOR_UNKNOW_DATA,
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.id_data = SENSOR_UNKNOW_DATA,
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.precision = MMA8452_PRECISION,
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.ctrl_reg = MMA8452_REG_CTRL_REG1,
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.int_status_reg = MMA8452_REG_INTSRC,
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.range = {-MMA845X_RANGE, MMA845X_RANGE},
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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 gsensor_mma8452_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, &gsensor_mma8452_ops);
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}
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static int gsensor_mma8452_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_mma8452_ops);
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}
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static const struct i2c_device_id gsensor_mma8452_id[] = {
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{"gs_mma8452", ACCEL_ID_MMA845X},
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{}
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};
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static struct i2c_driver gsensor_mma8452_driver = {
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.probe = gsensor_mma8452_probe,
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.remove = gsensor_mma8452_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_mma8452_id,
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.driver = {
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.name = "gsensor_mma8452",
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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(gsensor_mma8452_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("mma8452 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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