// SPDX-License-Identifier: GPL-2.0
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/*
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* kernel/drivers/input/sensors/accel/mxc6655xa.c
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*
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* Copyright (C) 2020 Rockchip 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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/* Linear acceleration register */
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#define MXC6655_INT_SRC0 0x00
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#define MXC6655_INT_CLR0 0x00
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#define MXC6655_INT_SRC1 0x01
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#define MXC6655_INT_CLR1 0x01
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#define MXC6655_STATUS 0x02
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#define MXC6655_OUT_X_H 0x03
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#define MXC6655_OUT_X_L 0x04
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#define MXC6655_OUT_Y_H 0x05
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#define MXC6655_OUT_Y_L 0x06
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#define MXC6655_OUT_Z_H 0x07
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#define MXC6655_OUT_Z_L 0x08
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#define MXC6655_OUT_TEMP 0x09
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#define MXC6655_INT_MASK0 0x0A
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#define MXC6655_INT_MASK1 0x0B
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#define MXC6655_DETECTION 0x0C
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#define MXC6655_CONTROL 0x0D
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#define MXC6655_WHO_AM_I_A 0x0F
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#define MXC6655_DEVICE_ID_A 0x05
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#define MXC6655_POWER_DOWN BIT(0)
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#define MXC6655_INT_ENABLE BIT(0)
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#define MXC6655_RANGE (16384 * 2)
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#define MXC6655_PRECISION 12
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#define MXC6655_BOUNDARY (0x1 << (MXC6655_PRECISION - 1))
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#define MXC6655_GRAVITY_STEP (MXC6655_RANGE / MXC6655_BOUNDARY)
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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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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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if (enable)
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sensor->ops->ctrl_data &= ~MXC6655_POWER_DOWN;
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else
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sensor->ops->ctrl_data |= MXC6655_POWER_DOWN;
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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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pr_debug("%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 status = 0;
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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,
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"%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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/* Operating mode control and full-scale range(2g) */
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result = sensor_write_reg(client, sensor->ops->ctrl_reg, 0x01);
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if (result) {
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dev_err(&client->dev,
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"%s:fail to set MXC6655_CONTROL.\n", __func__);
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return result;
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}
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/* Enable or Disable for DRDY Interrupt */
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status = sensor_read_reg(client, MXC6655_INT_MASK1);
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if (sensor->pdata->irq_enable)
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status |= MXC6655_INT_ENABLE;
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else
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status &= ~MXC6655_INT_ENABLE;
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result = sensor_write_reg(client, MXC6655_INT_MASK1, status);
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if (result) {
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dev_err(&client->dev,
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"%s:fail to set MXC6655_INT_MASK1.\n", __func__);
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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_convert_data(struct i2c_client *client,
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char high_byte, char low_byte)
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{
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s64 result;
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result = ((int)high_byte << (MXC6655_PRECISION - 8)) |
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((int)low_byte >> (16 - MXC6655_PRECISION));
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if (result < MXC6655_BOUNDARY)
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result = result * MXC6655_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - MXC6655_PRECISION))) +
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1) * MXC6655_GRAVITY_STEP) + 1;
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return (int)result;
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}
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static int gsensor_report_value(struct i2c_client *client,
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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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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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}
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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_axis axis;
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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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char buffer[6] = {0};
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char value = 0;
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int x, y, z;
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int ret = 0;
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if (sensor->ops->read_len < 6) {
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dev_err(&client->dev, "%s:Read len is error,len= %d\n",
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__func__, sensor->ops->read_len);
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return -1;
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}
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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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dev_err(&client->dev,
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"mxc6655 read data failed, ret = %d\n", ret);
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return ret;
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}
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/* x,y,z axis is the 12-bit acceleration output */
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x = sensor_convert_data(sensor->client, buffer[0], buffer[1]);
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y = sensor_convert_data(sensor->client, buffer[2], buffer[3]);
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z = sensor_convert_data(sensor->client, buffer[4], buffer[5]);
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pr_debug("%s: x = %d, y = %d, z = %d\n", __func__, x, y, z);
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axis.x = (pdata->orientation[0]) * x + (pdata->orientation[1]) * y +
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(pdata->orientation[2]) * z;
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axis.y = (pdata->orientation[3]) * x + (pdata->orientation[4]) * y +
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(pdata->orientation[5]) * z;
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axis.z = (pdata->orientation[6]) * x + (pdata->orientation[7]) * y +
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(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) {
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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if (value & 0x01) {
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pr_debug("%s:gsensor int status :0x%x\n",
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__func__, value);
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ret = sensor_write_reg(client, MXC6655_INT_CLR1, 0x01);
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if (ret) {
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dev_err(&client->dev,
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"%s:fail to clear MXC6655_INT_CLR1.\n",
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__func__);
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return ret;
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}
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}
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}
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return ret;
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}
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static struct sensor_operate gsensor_mxc6655_ops = {
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.name = "gs_mxc6655xa",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_MXC6655XA,
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.read_reg = MXC6655_OUT_X_H,
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.read_len = 6,
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.id_reg = MXC6655_WHO_AM_I_A,
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.id_data = MXC6655_DEVICE_ID_A,
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.precision = MXC6655_PRECISION,
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.ctrl_reg = MXC6655_CONTROL,
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.int_status_reg = MXC6655_INT_SRC1,
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.range = {-MXC6655_RANGE, MXC6655_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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static int gsensor_mxc6655_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_mxc6655_ops);
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}
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static int gsensor_mxc6655_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_mxc6655_ops);
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}
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static const struct i2c_device_id gsensor_mxc6655_id[] = {
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{"gs_mxc6655xa", ACCEL_ID_MXC6655XA},
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{}
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};
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static struct i2c_driver gsensor_mxc6655_driver = {
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.probe = gsensor_mxc6655_probe,
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.remove = gsensor_mxc6655_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_mxc6655_id,
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.driver = {
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.name = "gsensor_mxc6655",
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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_mxc6655_driver);
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MODULE_AUTHOR("Wang Jie <dave.wang@rock-chips.com>");
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MODULE_DESCRIPTION("mxc6655 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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