/* 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/sensor-dev.h>
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#define ALS_CMD 0x01
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#define ALS_DT1 0x02
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#define ALS_DT2 0X03
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#define ALS_THDH1 0X04
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#define ALS_THDH2 0X05
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#define ALS_THDL1 0X06
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#define ALS_THDL2 0X07
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#define STA_TUS 0X08
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#define PS_CMD 0X09
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#define PS_DT 0X0A
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#define PS_THDH 0X0B
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#define PS_THDL 0X0C
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#define SW_RESET 0X80
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//ALS_CMD
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#define ALS_SD_ENABLE (0<<0)
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#define ALS_SD_DISABLE (1<<0)
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#define ALS_INT_DISABLE (0<<1)
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#define ALS_INT_ENABLE (1<<1)
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#define ALS_1T_100MS (0<<2)
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#define ALS_2T_200MS (1<<2)
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#define ALS_4T_400MS (2<<2)
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#define ALS_8T_800MS (3<<2)
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#define ALS_RANGE_57671 (0<<6)
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#define ALS_RANGE_28836 (1<<6)
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//PS_CMD
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#define PS_SD_ENABLE (0<<0)
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#define PS_SD_DISABLE (1<<0)
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#define PS_INT_DISABLE (0<<1)
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#define PS_INT_ENABLE (1<<1)
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#define PS_10T_2MS (0<<2)
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#define PS_15T_3MS (1<<2)
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#define PS_20T_4MS (2<<2)
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#define PS_25T_5MS (3<<2)
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#define PS_CUR_100MA (0<<4)
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#define PS_CUR_200MA (1<<4)
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#define PS_SLP_10MS (0<<5)
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#define PS_SLP_30MS (1<<5)
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#define PS_SLP_90MS (2<<5)
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#define PS_SLP_270MS (3<<5)
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#define TRIG_PS_OR_LS (0<<7)
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#define TRIG_PS_AND_LS (1<<7)
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//STA_TUS
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#define STA_PS_INT (1<<5)
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#define STA_ALS_INT (1<<4)
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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 = PS_SD_DISABLE;
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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 = ~PS_SD_DISABLE;
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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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if(enable)
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sensor->ops->report(sensor->client);
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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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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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result = sensor_write_reg(client, SW_RESET, 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->ops->ctrl_data |= PS_15T_3MS| PS_SLP_90MS;
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sensor->ops->ctrl_data &= ~TRIG_PS_AND_LS;
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if(sensor->pdata->irq_enable)
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sensor->ops->ctrl_data |= PS_INT_ENABLE;
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else
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sensor->ops->ctrl_data &= ~PS_INT_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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{
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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 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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int result = 0;
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int value = 0;
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char buffer[1] = {0};
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if(sensor->ops->read_len < 1) //sensor->ops->read_len = 1
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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, 1);
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buffer[0] = sensor->ops->read_reg;
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result = sensor_rx_data(client, buffer, sensor->ops->read_len);
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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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value = buffer[0];
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input_report_abs(sensor->input_dev, ABS_DISTANCE, (value>>2)?0:1);
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input_sync(sensor->input_dev);
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DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,(value>>2)?0:1);
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if(sensor->pdata->irq_enable)
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{
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if(sensor->ops->int_status_reg)
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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}
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if(value & STA_PS_INT)
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{
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value &= ~STA_PS_INT;
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result = sensor_write_reg(client, sensor->ops->int_status_reg,value); //clear int
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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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}
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return result;
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}
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static struct sensor_operate proximity_stk3171_ops = {
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.name = "ps_stk3171",
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.type = SENSOR_TYPE_PROXIMITY, //sensor type and it should be correct
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.id_i2c = PROXIMITY_ID_STK3171, //i2c id number
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.read_reg = PS_DT, //read data
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.read_len = 1, //data length
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.id_reg = SENSOR_UNKNOW_DATA, //read device id from this register
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.id_data = SENSOR_UNKNOW_DATA, //device id
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.precision = 8, //8 bits
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.ctrl_reg = PS_CMD, //enable or disable
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.int_status_reg = STA_TUS, //intterupt status register
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.range = {0,1}, //range
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.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
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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 proximity_stk3171_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, &proximity_stk3171_ops);
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}
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static int proximity_stk3171_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &proximity_stk3171_ops);
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}
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static const struct i2c_device_id proximity_stk3171_id[] = {
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{"ps_stk3171", PROXIMITY_ID_STK3171},
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{}
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};
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static struct i2c_driver proximity_stk3171_driver = {
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.probe = proximity_stk3171_probe,
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.remove = proximity_stk3171_remove,
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.shutdown = sensor_shutdown,
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.id_table = proximity_stk3171_id,
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.driver = {
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.name = "proximity_stk3171",
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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(proximity_stk3171_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("ps_stk3171 proximity driver");
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MODULE_LICENSE("GPL");
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