/* drivers/input/sensors/access/angle_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 KXTIK_DEVID_1004 0x05 //chip id
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#define KXTIK_DEVID_J9_1005 0x07 //chip id
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#define KXTIK_DEVID_J2_1009 0x09 //chip id
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#define KXTIK_DEVID_1013 0x11 //chip id
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#define KXTIK_RANGE 2000000
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#define KXTIK_XOUT_HPF_L (0x00) /* 0000 0000 */
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#define KXTIK_XOUT_HPF_H (0x01) /* 0000 0001 */
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#define KXTIK_YOUT_HPF_L (0x02) /* 0000 0010 */
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#define KXTIK_YOUT_HPF_H (0x03) /* 0000 0011 */
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#define KXTIK_ZOUT_HPF_L (0x04) /* 0001 0100 */
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#define KXTIK_ZOUT_HPF_H (0x05) /* 0001 0101 */
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#define KXTIK_XOUT_L (0x06) /* 0000 0110 */
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#define KXTIK_XOUT_H (0x07) /* 0000 0111 */
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#define KXTIK_YOUT_L (0x08) /* 0000 1000 */
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#define KXTIK_YOUT_H (0x09) /* 0000 1001 */
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#define KXTIK_ZOUT_L (0x0A) /* 0001 1010 */
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#define KXTIK_ZOUT_H (0x0B) /* 0001 1011 */
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#define KXTIK_ST_RESP (0x0C) /* 0000 1100 */
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#define KXTIK_WHO_AM_I (0x0F) /* 0000 1111 */
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#define KXTIK_TILT_POS_CUR (0x10) /* 0001 0000 */
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#define KXTIK_TILT_POS_PRE (0x11) /* 0001 0001 */
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#define KXTIK_INT_SRC_REG1 (0x15) /* 0001 0101 */
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#define KXTIK_INT_SRC_REG2 (0x16) /* 0001 0110 */
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#define KXTIK_STATUS_REG (0x18) /* 0001 1000 */
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#define KXTIK_INT_REL (0x1A) /* 0001 1010 */
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#define KXTIK_CTRL_REG1 (0x1B) /* 0001 1011 */
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#define KXTIK_CTRL_REG2 (0x1C) /* 0001 1100 */
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#define KXTIK_CTRL_REG3 (0x1D) /* 0001 1101 */
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#define KXTIK_INT_CTRL_REG1 (0x1E) /* 0001 1110 */
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#define KXTIK_INT_CTRL_REG2 (0x1F) /* 0001 1111 */
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#define KXTIK_INT_CTRL_REG3 (0x20) /* 0010 0000 */
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#define KXTIK_DATA_CTRL_REG (0x21) /* 0010 0001 */
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#define KXTIK_TILT_TIMER (0x28) /* 0010 1000 */
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#define KXTIK_WUF_TIMER (0x29) /* 0010 1001 */
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#define KXTIK_TDT_TIMER (0x2B) /* 0010 1011 */
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#define KXTIK_TDT_H_THRESH (0x2C) /* 0010 1100 */
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#define KXTIK_TDT_L_THRESH (0x2D) /* 0010 1101 */
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#define KXTIK_TDT_TAP_TIMER (0x2E) /* 0010 1110 */
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#define KXTIK_TDT_TOTAL_TIMER (0x2F) /* 0010 1111 */
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#define KXTIK_TDT_LATENCY_TIMER (0x30) /* 0011 0000 */
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#define KXTIK_TDT_WINDOW_TIMER (0x31) /* 0011 0001 */
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#define KXTIK_WUF_THRESH (0x5A) /* 0101 1010 */
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#define KXTIK_TILT_ANGLE (0x5C) /* 0101 1100 */
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#define KXTIK_HYST_SET (0x5F) /* 0101 1111 */
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/* CONTROL REGISTER 1 BITS */
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#define KXTIK_DISABLE 0x7F
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#define KXTIK_ENABLE (1 << 7)
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#define KXTIK_DRDYE (1 << 5)
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/* INPUT_ABS CONSTANTS */
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#define FUZZ 3
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#define FLAT 3
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/* RESUME STATE INDICES */
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#define RES_DATA_CTRL 0
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#define RES_CTRL_REG1 1
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#define RES_INT_CTRL1 2
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#define RESUME_ENTRIES 3
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/* CTRL_REG1: set resolution, g-range, data ready enable */
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/* Output resolution: 8-bit valid or 12-bit valid */
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#define KXTIK_RES_8BIT 0
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#define KXTIK_RES_12BIT (1 << 6)
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/* Output g-range: +/-2g, 4g, or 8g */
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#define KXTIK_G_2G 0
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#define KXTIK_G_4G (1 << 3)
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#define KXTIK_G_8G (1 << 4)
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/* DATA_CTRL_REG: controls the output data rate of the part */
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#define KXTIK_ODR12_5F 0
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#define KXTIK_ODR25F 1
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#define KXTIK_ODR50F 2
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#define KXTIK_ODR100F 3
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#define KXTIK_ODR200F 4
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#define KXTIK_ODR400F 5
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#define KXTIK_ODR800F 6
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/* kxtik */
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#define KXTIK_PRECISION 12
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#define KXTIK_BOUNDARY (0x1 << (KXTIK_PRECISION - 1))
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#define KXTIK_GRAVITY_STEP KXTIK_RANGE / KXTIK_BOUNDARY
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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 = KXTIK_ENABLE; //kxtik
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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 = ~KXTIK_ENABLE; //kxtik
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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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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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int i = 0;
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unsigned char id_reg = KXTIK_WHO_AM_I;
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unsigned char id_data = 0;
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unsigned char ctrl_data_save = 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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for(i=0; i<3; i++)
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{
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result = sensor_rx_data(client, &id_reg, 1);
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id_data = id_reg;
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if(!result)
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break;
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}
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if(result)
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{
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printk("%s:fail to read id,result=%d\n",__func__, result);
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return result;
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}
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sensor->devid = id_data;
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result = sensor_write_reg(client, KXTIK_DATA_CTRL_REG, KXTIK_ODR400F);
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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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if(sensor->pdata->irq_enable) //open interrupt
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{
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/*
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BIT 4 IEA sets the polarity of the physical interrupt pin (7)
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IEA = 0 ? polarity of the physical interrupt pin (7) is active low
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IEA = 1 ? polarity of the physical interrupt pin (7) is active high
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BIT 3 IEL sets the response of the physical interrupt pin (7)
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IEL = 0 ? the physical interrupt pin (7) latches until it is cleared by reading INT_REL
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IEL = 1 ? the physical interrupt pin (7) will transmit one pulse with a period of 0.03 - 0.05ms
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*/
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if (id_data == KXTIK_DEVID_1004)
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result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x34);//enable int,active high,need read INT_REL
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else
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result = sensor_write_reg(client, KXTIK_INT_CTRL_REG1, 0x28);//enable int,active high,need read INT_REL
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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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ctrl_data_save = sensor_read_reg(client, sensor->ops->ctrl_reg);
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DBG("%s: ctrl_data_save = 0x%x\n", __func__, ctrl_data_save);
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sensor->ops->ctrl_data = (KXTIK_RES_12BIT | KXTIK_G_2G);
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if(sensor->pdata->irq_enable)
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{
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sensor->ops->ctrl_data &= ~KXTIK_ENABLE;
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sensor->ops->ctrl_data |= KXTIK_DRDYE;
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}
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DBG("%s: first write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data);
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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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if(ctrl_data_save & 0x80)
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sensor->ops->ctrl_data |= KXTIK_ENABLE;
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else
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sensor->ops->ctrl_data &= ~KXTIK_ENABLE;
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DBG("%s: second write sensor->ops->ctrl_data = 0x%x\n", __func__, sensor->ops->ctrl_data);
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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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DBG("%s:%s id=0x%x\n",__func__,sensor->ops->name, id_data);
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return result;
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}
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static int sensor_convert_data(struct i2c_client *client, char high_byte, char low_byte)
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{
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s64 result;
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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 precision = sensor->ops->precision; */
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switch (sensor->devid) {
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case KXTIK_DEVID_1004:
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case KXTIK_DEVID_1013:
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case KXTIK_DEVID_J9_1005:
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case KXTIK_DEVID_J2_1009:
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result = (((int)high_byte << 8) | ((int)low_byte ))>>4;
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if (result < KXTIK_BOUNDARY)
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result = result * KXTIK_GRAVITY_STEP;
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else
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result = ~(((~result & (0x7fff >> (16 - KXTIK_PRECISION))) + 1)
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* KXTIK_GRAVITY_STEP) + 1;
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break;
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default:
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printk(KERN_ERR "%s: devid wasn't set correctly\n",__func__);
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return -EFAULT;
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}
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return (int)result;
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}
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static int angle_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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/* 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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DBG("Gsensor x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
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return 0;
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}
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#define GSENSOR_MIN 10
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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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int x,y,z;
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struct sensor_axis axis;
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char buffer[6] = {0};
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char value = 0;
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if(sensor->ops->read_len < 6) //sensor->ops->read_len = 6
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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, 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;
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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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return ret;
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} while (0);
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//this angle need 6 bytes buffer
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x = sensor_convert_data(sensor->client, buffer[1], buffer[0]); //buffer[1]:high bit
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y = sensor_convert_data(sensor->client, buffer[3], buffer[2]);
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z = sensor_convert_data(sensor->client, buffer[5], buffer[4]);
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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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DBG( "%s: axis = %d %d %d \n", __func__, axis.x, axis.y, axis.z);
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//Report event only while value is changed to save some power
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if((abs(sensor->axis.x - axis.x) > GSENSOR_MIN) || (abs(sensor->axis.y - axis.y) > GSENSOR_MIN) || (abs(sensor->axis.z - axis.z) > GSENSOR_MIN))
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{
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angle_report_value(client, &axis);
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/* ?????ػ???????. */
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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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}
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if((sensor->pdata->irq_enable)&& (sensor->ops->int_status_reg >= 0)) //read sensor intterupt status register
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{
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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DBG("%s:sensor int status :0x%x\n",__func__,value);
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}
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return ret;
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}
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static struct sensor_operate angle_kxtik_ops = {
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.name = "angle_kxtik",
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.type = SENSOR_TYPE_ANGLE, //sensor type and it should be correct
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.id_i2c = ANGLE_ID_KXTIK, //i2c id number
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.read_reg = KXTIK_XOUT_L, //read data
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.read_len = 6, //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,
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.precision = KXTIK_PRECISION, //12 bits
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.ctrl_reg = KXTIK_CTRL_REG1, //enable or disable
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.int_status_reg = KXTIK_INT_REL, //intterupt status register
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.range = {-KXTIK_RANGE,KXTIK_RANGE}, //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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/****************operate according to sensor chip:end************/
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static int angle_kxtik_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, &angle_kxtik_ops);
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}
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static int angle_kxtik_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &angle_kxtik_ops);
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}
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static const struct i2c_device_id angle_kxtik_id[] = {
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{"angle_kxtik", ANGLE_ID_KXTIK},
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{}
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};
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static struct i2c_driver angle_kxtik_driver = {
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.probe = angle_kxtik_probe,
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.remove = angle_kxtik_remove,
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.shutdown = sensor_shutdown,
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.id_table = angle_kxtik_id,
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.driver = {
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.name = "angle_kxtik",
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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(angle_kxtik_driver);
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MODULE_AUTHOR("luowei <lw@rock-chips.com>");
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MODULE_DESCRIPTION("kxtik angle driver");
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MODULE_LICENSE("GPL");
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