/* 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 LIS3DH_INT_COUNT (0x0E)
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#define LIS3DH_WHO_AM_I (0x0F)
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/* full scale setting - register & mask */
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#define LIS3DH_TEMP_CFG_REG (0x1F)
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#define LIS3DH_CTRL_REG1 (0x20)
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#define LIS3DH_CTRL_REG2 (0x21)
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#define LIS3DH_CTRL_REG3 (0x22)
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#define LIS3DH_CTRL_REG4 (0x23)
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#define LIS3DH_CTRL_REG5 (0x24)
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#define LIS3DH_CTRL_REG6 (0x25)
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#define LIS3DH_REFERENCE (0x26)
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#define LIS3DH_STATUS_REG (0x27)
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#define LIS3DH_OUT_X_L (0x28)
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#define LIS3DH_OUT_X_H (0x29)
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#define LIS3DH_OUT_Y_L (0x2a)
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#define LIS3DH_OUT_Y_H (0x2b)
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#define LIS3DH_OUT_Z_L (0x2c)
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#define LIS3DH_OUT_Z_H (0x2d)
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#define LIS3DH_FIFO_CTRL_REG (0x2E)
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#define LIS3DH_INT1_CFG (0x30)
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#define LIS3DH_INT1_SRC (0x31)
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#define LIS3DH_INT1_THS (0x32)
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#define LIS3DH_INT1_DURATION (0x33)
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#define LIS3DH_TT_CFG (0x38)
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#define LIS3DH_TT_THS (0x3a)
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#define LIS3DH_TT_LIM (0x3b)
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#define LIS3DH_TT_TLAT (0x3c)
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#define LIS3DH_TT_TW (0x3d)
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#define LIS3DH_DEVID (0x33)
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#define LIS3DH_ACC_DISABLE (0x08)
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#define LIS3DH_RANGE 2000000
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/* LIS3DH */
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#define LIS3DH_PRECISION 16
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#define LIS3DH_ACC_ODR1 0x10 /* 1Hz output data rate */
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#define LIS3DH_ACC_ODR10 0x20 /* 10Hz output data rate */
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#define LIS3DH_ACC_ODR25 0x30 /* 25Hz output data rate */
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#define LIS3DH_ACC_ODR50 0x40 /* 50Hz output data rate */
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#define LIS3DH_ACC_ODR100 0x50 /* 100Hz output data rate */
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#define LIS3DH_ACC_ODR200 0x60 /* 200Hz output data rate */
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#define LIS3DH_ACC_ODR400 0x70 /* 400Hz output data rate */
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#define LIS3DH_ACC_ODR1250 0x90 /* 1250Hz output data rate */
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struct sensor_reg_data {
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char reg;
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char data;
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};
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/****************operate according to sensor chip:start************/
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/* odr table, hz */
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struct odr_table {
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unsigned int cutoff_ms;
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unsigned int mask;
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};
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static struct odr_table lis3dh_acc_odr_table[] = {
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{1, LIS3DH_ACC_ODR1250},
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{3, LIS3DH_ACC_ODR400},
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{5, LIS3DH_ACC_ODR200},
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{10, LIS3DH_ACC_ODR100},
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{20, LIS3DH_ACC_ODR50},
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{40, LIS3DH_ACC_ODR25},
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{100, LIS3DH_ACC_ODR10},
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{1000, LIS3DH_ACC_ODR1},
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};
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static int lis3dh_select_odr(int want)
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{
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int i;
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int max_index = ARRAY_SIZE(lis3dh_acc_odr_table);
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for (i = max_index - 1; i >= 0; i--) {
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if ((lis3dh_acc_odr_table[i].cutoff_ms <= want) ||
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(i == 0))
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break;
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}
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return lis3dh_acc_odr_table[i].mask;
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}
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static int sensor_active(struct i2c_client *client, int enable, int rate/*ms*/)
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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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int odr_rate = 0;
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if (rate == 0) {
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dev_err(&client->dev, "%s: rate == 0!!!\n", __func__);
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return -1;
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}
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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result = lis3dh_select_odr(odr_rate);
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sensor->ops->ctrl_data |= result;
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if (!enable) {
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status = LIS3DH_ACC_DISABLE;
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sensor->ops->ctrl_data |= status;
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} else {
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sensor->ops->init(client);
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status = ~LIS3DH_ACC_DISABLE;
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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, 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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static int sensor_init(struct i2c_client *client)
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{
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int result = 0;
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int i;
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struct sensor_reg_data reg_data[] = {
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{LIS3DH_CTRL_REG1, 0x07},
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{LIS3DH_TEMP_CFG_REG, 0x00},
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{LIS3DH_FIFO_CTRL_REG, 0x00},
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{LIS3DH_TT_THS, 0x00},
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{LIS3DH_TT_LIM, 0x00},
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{LIS3DH_TT_TLAT, 0x00},
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{LIS3DH_TT_TW, 0x00},
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{LIS3DH_TT_CFG, 0x00},
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{LIS3DH_INT1_THS, 0x7f},
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{LIS3DH_INT1_DURATION, 0x7f},
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{LIS3DH_INT1_CFG, 0xff},
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{LIS3DH_CTRL_REG2, 0x00},
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{LIS3DH_CTRL_REG3, 0x40},
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{LIS3DH_CTRL_REG4, 0x08},
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{LIS3DH_CTRL_REG5, 0x08},
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{LIS3DH_CTRL_REG6, 0x40},
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};
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for (i = 0; i < (sizeof(reg_data) / sizeof(struct sensor_reg_data)); i++) {
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result = sensor_write_reg(client, reg_data[i].reg, reg_data[i].data);
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if (result) {
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dev_err(&client->dev, "%s:line=%d,i=%d,error\n", __func__, __LINE__, i);
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return result;
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}
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}
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return 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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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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short x, y, z;
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struct sensor_axis axis;
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char buffer[6] = {0};
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if (sensor->ops->read_len < 6) {
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dev_err(&client->dev, "%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 | 0x80;
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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, "lis3dh read data failed, ret = %d\n", ret);
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return ret;
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}
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} while (0);
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x = ((buffer[1] << 8) & 0xff00) + (buffer[0] & 0xFF);
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y = ((buffer[3] << 8) & 0xff00) + (buffer[2] & 0xFF);
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z = ((buffer[5] << 8) & 0xff00) + (buffer[4] & 0xFF);
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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))
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sensor_read_reg(client, sensor->ops->int_status_reg);
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return ret;
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}
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static struct sensor_operate gsensor_lis3dh_ops = {
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.name = "lis3dh",
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.type = SENSOR_TYPE_ACCEL,
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.id_i2c = ACCEL_ID_LIS3DH,
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.read_reg = LIS3DH_OUT_X_L,
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.read_len = 6,
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.id_reg = LIS3DH_WHO_AM_I,
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.id_data = LIS3DH_DEVID,
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.precision = LIS3DH_PRECISION,
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.ctrl_reg = LIS3DH_CTRL_REG1,
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.int_status_reg = LIS3DH_INT1_SRC,
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.range = {-32768, +32768},
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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_lis3dh_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_lis3dh_ops);
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}
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static int gsensor_lis3dh_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &gsensor_lis3dh_ops);
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}
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static const struct i2c_device_id gsensor_lis3dh_id[] = {
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{"gs_lis3dh", ACCEL_ID_LIS3DH},
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{}
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};
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static struct i2c_driver gsensor_lis3dh_driver = {
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.probe = gsensor_lis3dh_probe,
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.remove = gsensor_lis3dh_remove,
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.shutdown = sensor_shutdown,
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.id_table = gsensor_lis3dh_id,
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.driver = {
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.name = "gsensor_lis3dh",
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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_lis3dh_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("lis3dh 3-Axis accelerometer driver");
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MODULE_LICENSE("GPL");
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