274 lines
7.3 KiB
C
274 lines
7.3 KiB
C
/* drivers/input/sensors/access/kxtik.c
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*
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* Copyright (C) 2012-2015 Rockchip Electronics Co., Ltd.
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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 ISL29023_REG_ADD_COMMAND1 0x00
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#define COMMMAND1_OPMODE_SHIFT 5
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#define COMMMAND1_OPMODE_MASK (7 << COMMMAND1_OPMODE_SHIFT)
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#define COMMMAND1_OPMODE_POWER_DOWN (0 << COMMMAND1_OPMODE_SHIFT)
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#define COMMMAND1_OPMODE_ALS_ONCE (1 << COMMMAND1_OPMODE_SHIFT)
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#define COMMMAND1_OPMODE_IR_ONCE (2 << COMMMAND1_OPMODE_SHIFT)
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#define COMMMAND1_OPMODE_ALS_CONTINUE (5 << COMMMAND1_OPMODE_SHIFT)
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#define COMMMAND1_OPMODE_IR_CONTINUE (6 << COMMMAND1_OPMODE_SHIFT)
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#define ISL29023_REG_ADD_COMMANDII 0x01
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#define COMMANDII_RESOLUTION_SHIFT 2
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#define COMMANDII_RESOLUTION_65536 (0x0 << COMMANDII_RESOLUTION_SHIFT)
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#define COMMANDII_RESOLUTION_4096 (0x1 << COMMANDII_RESOLUTION_SHIFT)
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#define COMMANDII_RESOLUTION_256 (0x2 << COMMANDII_RESOLUTION_SHIFT)
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#define COMMANDII_RESOLUTION_16 (0x3 << COMMANDII_RESOLUTION_SHIFT)
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#define COMMANDII_RESOLUTION_MASK (0x3 << COMMANDII_RESOLUTION_SHIFT)
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#define COMMANDII_RANGE_SHIFT 0
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#define COMMANDII_RANGE_1000 (0x0 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_RANGE_4000 (0x1 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_RANGE_16000 (0x2 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_RANGE_64000 (0x3 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_RANGE_MASK (0x3 << COMMANDII_RANGE_SHIFT)
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#define COMMANDII_SCHEME_SHIFT 7
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#define COMMANDII_SCHEME_MASK (0x1 << COMMANDII_SCHEME_SHIFT)
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#define ISL29023_REG_ADD_DATA_LSB 0x02
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#define ISL29023_REG_ADD_DATA_MSB 0x03
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#define ISL29023_MAX_REGS ISL29023_REG_ADD_DATA_MSB
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#define ISL29023_REG_LT_LSB 0x04
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#define ISL29023_REG_LT_MSB 0x05
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#define ISL29023_REG_HT_LSB 0x06
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#define ISL29023_REG_HT_MSB 0x07
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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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sensor->ops->ctrl_data &= 0x1f;
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sensor->ops->ctrl_data |= COMMMAND1_OPMODE_ALS_CONTINUE;
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}
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else
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{
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sensor->ops->ctrl_data &= 0x1f;
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//sensor->ops->ctrl_data |= COMMMAND1_OPMODE_POWER_DOWN;
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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, ISL29023_REG_ADD_COMMANDII, COMMANDII_RANGE_4000 | COMMANDII_RESOLUTION_4096);
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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 light_report_value(struct input_dev *input, int data)
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{
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unsigned char index = 0;
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if(data <= 2){
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index = 0;goto report;
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}
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else if(data <= 3){
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index = 2;goto report;
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}
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else if(data <= 5){
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index = 3;goto report;
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}
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else if(data <= 8){
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index = 4;goto report;
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}
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else if(data <= 11){
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index = 5;goto report;
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}
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else if(data <= 14){
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index = 6;goto report;
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}
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else if(data <= 17){
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index = 7;goto report;
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}
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else{
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index = 7;goto report;
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}
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report:
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input_report_abs(input, ABS_MISC, index);
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input_sync(input);
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return index;
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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[2] = {0};
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char index = 0;
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if(sensor->ops->read_len < 2) //sensor->ops->read_len = 2
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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, 2);
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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[1] << 8) | buffer[0];
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index = light_report_value(sensor->input_dev, value);
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DBG("%s:%s result=0x%x,index=%d\n",__func__,sensor->ops->name, value,index);
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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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}
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return result;
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}
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static struct sensor_operate light_isl29023_ops = {
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.name = "ls_isl29023",
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.type = SENSOR_TYPE_LIGHT, //sensor type and it should be correct
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.id_i2c = LIGHT_ID_ISL29023, //i2c id number
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.read_reg = ISL29023_REG_ADD_DATA_LSB, //read data
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.read_len = 2, //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 = 16, //8 bits
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.ctrl_reg = ISL29023_REG_ADD_COMMAND1, //enable or disable
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.int_status_reg = ISL29023_REG_ADD_COMMAND1, //intterupt status register
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.range = {100,65535}, //range
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.brightness ={10,255}, //brightness
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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 light_isl29023_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, &light_isl29023_ops);
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}
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static void light_isl29023_remove(struct i2c_client *client)
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{
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sensor_unregister_device(client, NULL, &light_isl29023_ops);
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}
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static const struct i2c_device_id light_isl29023_id[] = {
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{"ls_isl29023", LIGHT_ID_ISL29023},
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{}
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};
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static struct i2c_driver light_isl29023_driver = {
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.probe = light_isl29023_probe,
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.remove = (void *)light_isl29023_remove,
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.shutdown = sensor_shutdown,
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.id_table = light_isl29023_id,
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.driver = {
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.name = "light_isl29023",
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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(light_isl29023_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("isl29023 light driver");
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MODULE_LICENSE("GPL");
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