284 lines
6.5 KiB
C
284 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* kernel/drivers/input/sensors/lsensor/ls_em3071x.c
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*
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* Copyright (C) 2020 Rockchip Electronics Co., Ltd.
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* Author: Wang Jie <dave.wang@rock-chips.com>
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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 <linux/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 STA_TUS 0X02
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#define ALS_DT1 0x09
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#define ALS_DT2 0X0a
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#define ALS_THDL1 0X05
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#define ALS_THDL2 0X06
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#define ALS_THDH1 0X07
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#define SW_RESET 0X0E
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/* ALS_CMD */
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#define ALS_SD_ENABLE 0x06
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#define ALS_SD_DISABLE 0xF8
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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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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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if (enable) {
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status = ALS_SD_ENABLE;
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sensor->ops->ctrl_data |= status;
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} else {
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status = ~ALS_SD_ENABLE;
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sensor->ops->ctrl_data &= status;
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}
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result = sensor_write_reg(client, sensor->ops->ctrl_reg,
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sensor->ops->ctrl_data);
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if (result) {
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dev_err(&client->dev, "%s:fail to active sensor\n", __func__);
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return result;
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}
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dev_dbg(&client->dev, "%s:reg = 0x%x, reg_ctrl = 0x%x, enable= %d\n",
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__func__,
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sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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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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dev_err(&client->dev, "%s: line = %d, result = %d\n",
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__func__, __LINE__, result);
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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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dev_err(&client->dev,
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"%s: fail to set SW_RESET(%d)\n", __func__, result);
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return result;
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}
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/* it is important,if not then als can not trig intterupt */
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result = sensor_write_reg(client, ALS_THDL1, 0);
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if (result) {
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dev_err(&client->dev,
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"%s: fail to set ALS_THDL1(%d)\n", __func__, result);
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return result;
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}
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result = sensor_write_reg(client, ALS_THDL2, 0XF0);
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if (result) {
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dev_err(&client->dev,
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"%s: fail to set ALS_THDL2(%d)\n", __func__, result);
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return result;
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}
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result = sensor_write_reg(client, ALS_THDH1, 0XFF);
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if (result) {
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dev_err(&client->dev,
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"%s: fail to set ALS_THDH1(%d)\n", __func__, result);
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return result;
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}
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result = sensor_write_reg(client, STA_TUS, 0X00);
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if (result) {
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dev_err(&client->dev,
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"%s: fail to set STA_TUS(%d)\n", __func__, result);
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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 <= 10) {
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index = 0;
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goto report;
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} else if (data <= 60) {
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index = 1;
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goto report;
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} else if (data <= 122) {
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index = 2;
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goto report;
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} else if (data <= 200) {
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index = 3;
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goto report;
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} else if (data <= 400) {
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index = 4;
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goto report;
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} else if (data <= 800) {
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index = 5;
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goto report;
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} else if (data <= 1260) {
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index = 6;
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goto report;
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} else {
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index = 7;
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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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buffer[0] = sensor_read_reg(client, 0X09);
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buffer[1] = sensor_read_reg(client, 0X0A);
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value = ((buffer[1] & 0X0F) << 8) | buffer[0];
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index = light_report_value(sensor->input_dev, value);
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dev_dbg(&client->dev,
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"%s: value = %d, index = %d\n", __func__, value, index);
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if (sensor->pdata->irq_enable) {
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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if (value & STA_ALS_INT) {
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value &= ~STA_ALS_INT;
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result = sensor_write_reg(client,
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sensor->ops->int_status_reg, value);
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if (result) {
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dev_err(&client->dev,
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"%s:write status reg error(%d)\n",
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__func__, result);
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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 light_em3071x_ops = {
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.name = "ls_em3071x",
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.type = SENSOR_TYPE_LIGHT,
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.id_i2c = LIGHT_ID_EM3071X,
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.read_reg = ALS_DT1,
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.read_len = 2,
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.id_reg = SENSOR_UNKNOW_DATA,
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.id_data = SENSOR_UNKNOW_DATA,
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.precision = 16,
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.ctrl_reg = ALS_CMD,
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.int_status_reg = STA_TUS,
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.range = {100, 65535},
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.brightness = {10, 255},
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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 light_em3071x_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_em3071x_ops);
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}
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static void light_em3071x_remove(struct i2c_client *client)
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{
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sensor_unregister_device(client, NULL, &light_em3071x_ops);
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}
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static const struct i2c_device_id light_em3071x_id[] = {
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{"ls_em3071x", LIGHT_ID_EM3071X},
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{}
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};
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static struct i2c_driver light_em3071x_driver = {
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.probe = light_em3071x_probe,
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.remove = (void *)light_em3071x_remove,
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.shutdown = sensor_shutdown,
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.id_table = light_em3071x_id,
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.driver = {
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.name = "light_em3071x",
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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_em3071x_driver);
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MODULE_AUTHOR("Wang Jie <dave.wang@rock-chips.com>");
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MODULE_DESCRIPTION("em3071x light driver");
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MODULE_LICENSE("GPL");
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