731 lines
19 KiB
C
Executable File
731 lines
19 KiB
C
Executable File
/*
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* mma8452.c - Linux kernel modules for 3-Axis Orientation/Motion
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* Detection Sensor
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*
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* Copyright (C) 2009-2010 Freescale Semiconductor Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/hwmon.h>
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#include <linux/input-polldev.h>
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#include <linux/device.h>
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#include "../init-input.h"
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//#include <mach/system.h>
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//#include <mach/hardware.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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#if defined(CONFIG_HAS_EARLYSUSPEND) || defined(CONFIG_PM)
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#include <linux/pm.h>
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#endif
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/*
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* Defines
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*/
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#define assert(expr)\
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if (!(expr)) {\
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printk(KERN_ERR "Assertion failed! %s,%d,%s,%s\n",\
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__FILE__, __LINE__, __func__, #expr);\
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}
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#define MMA8452_DRV_NAME "mma8452"
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#define SENSOR_NAME MMA8452_DRV_NAME
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#define MMA8452_I2C_ADDR 0x1C
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#define MMA8452_ID 0x2A
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#define POLL_INTERVAL_MAX 500
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#define POLL_INTERVAL 100
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#define INPUT_FUZZ 32
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#define INPUT_FLAT 32
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#define MODE_CHANGE_DELAY_MS 100
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#define MMA8452_I2C_ADDR0 0x1C
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#define MMA8452_I2C_ADDR1 0x1D
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enum {
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DEBUG_INIT = 1U << 0,
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DEBUG_CONTROL_INFO = 1U << 1,
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DEBUG_DATA_INFO = 1U << 2,
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DEBUG_SUSPEND = 1U << 3,
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};
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static u32 debug_mask = 0;
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#define dprintk(level_mask, fmt, arg...) if (unlikely(debug_mask & level_mask)) \
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printk(KERN_DEBUG fmt , ## arg)
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module_param_named(debug_mask, debug_mask, int, 0644);
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/* Addresses to scan */
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static const unsigned short normal_i2c[2] = {0x1d,I2C_CLIENT_END};
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static const unsigned short i2c_address[2] = {MMA8452_I2C_ADDR0,MMA8452_I2C_ADDR1};
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static __u32 twi_id = 0;
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static int i2c_num = 0;
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static struct sensor_config_info gsensor_info = {
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.input_type = GSENSOR_TYPE,
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};
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#ifdef CONFIG_HAS_EARLYSUSPEND
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struct mma8452_data {
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struct i2c_client *client;
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struct early_suspend early_suspend;
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};
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static struct mma8452_data *mma8452_data;
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#endif
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/* register enum for mma8452 registers */
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enum {
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MMA8452_STATUS = 0x00,
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MMA8452_OUT_X_MSB,
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MMA8452_OUT_X_LSB,
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MMA8452_OUT_Y_MSB,
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MMA8452_OUT_Y_LSB,
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MMA8452_OUT_Z_MSB,
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MMA8452_OUT_Z_LSB,
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MMA8452_SYSMOD = 0x0B,
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MMA8452_INT_SOURCE,
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MMA8452_WHO_AM_I,
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MMA8452_XYZ_DATA_CFG,
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MMA8452_HP_FILTER_CUTOFF,
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MMA8452_PL_STATUS,
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MMA8452_PL_CFG,
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MMA8452_PL_COUNT,
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MMA8452_PL_BF_ZCOMP,
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MMA8452_PL_P_L_THS_REG,
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MMA8452_FF_MT_CFG,
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MMA8452_FF_MT_SRC,
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MMA8452_FF_MT_THS,
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MMA8452_FF_MT_COUNT,
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MMA8452_TRANSIENT_CFG = 0x1D,
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MMA8452_TRANSIENT_SRC,
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MMA8452_TRANSIENT_THS,
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MMA8452_TRANSIENT_COUNT,
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MMA8452_PULSE_CFG,
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MMA8452_PULSE_SRC,
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MMA8452_PULSE_THSX,
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MMA8452_PULSE_THSY,
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MMA8452_PULSE_THSZ,
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MMA8452_PULSE_TMLT,
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MMA8452_PULSE_LTCY,
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MMA8452_PULSE_WIND,
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MMA8452_ASLP_COUNT,
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MMA8452_CTRL_REG1,
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MMA8452_CTRL_REG2,
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MMA8452_CTRL_REG3,
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MMA8452_CTRL_REG4,
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MMA8452_CTRL_REG5,
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MMA8452_OFF_X,
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MMA8452_OFF_Y,
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MMA8452_OFF_Z,
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MMA8452_REG_END,
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};
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enum {
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MODE_2G = 0,
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MODE_4G,
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MODE_8G,
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};
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/* mma8452 status */
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struct mma8452_status {
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u8 mode;
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u8 ctl_reg1;
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};
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static struct mma8452_status mma_status = {
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.mode = 0,
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.ctl_reg1 = 0
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};
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static struct input_polled_dev *mma8452_idev;
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static struct device *hwmon_dev;
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static struct i2c_client *mma8452_i2c_client;
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static int enable_id = 0;
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static struct mutex enable_mutex;
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static struct mutex init_mutex;
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static void mma8452_resume_events(struct work_struct *work);
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static void mma8452_init_events(struct work_struct *work);
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static struct workqueue_struct *mma8452_resume_wq;
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static struct workqueue_struct *mma8452_init_wq;
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static DECLARE_WORK(mma8452_resume_work, mma8452_resume_events);
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static DECLARE_WORK(mma8452_init_work, mma8452_init_events);
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/**
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* gsensor_detect - Device detection callback for automatic device creation
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* return value:
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* = 0; success;
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* < 0; err
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*/
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static int gsensor_detect(struct i2c_client *client, struct i2c_board_info *info)
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{
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struct i2c_adapter *adapter = client->adapter;
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int ret ;
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dprintk(DEBUG_INIT, "%s enter \n", __func__);
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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if(twi_id == adapter->nr){
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while (i2c_num < 2) {
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client->addr = i2c_address[i2c_num++];
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pr_info("%s: addr= %x\n",__func__,client->addr);
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ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
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if ((ret&0x00FF) == MMA8452_ID) {
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printk( "%s: mma8452 equipment is detected!\n",__func__);
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strlcpy(info->type, SENSOR_NAME, I2C_NAME_SIZE);
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return 0;
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}
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}
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pr_info("%s: mma8452 equipment is not found!\n",__func__);
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return -ENODEV;
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} else {
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return -ENODEV;
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}
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}
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static ssize_t mma8452_enable_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long data;
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int error;
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error = strict_strtoul(buf, 10, &data);
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if(error) {
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pr_err("%s strict_strtoul error\n", __FUNCTION__);
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goto exit;
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}
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dprintk(DEBUG_CONTROL_INFO, "%s data = %ld \n", __func__, data);
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if(data) {
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mutex_lock(&init_mutex);
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enable_id = 1;
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mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
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mma_status.ctl_reg1 |= 0x01;
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error = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(error==0);
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mutex_unlock(&init_mutex);
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if(!error) {
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mutex_lock(&enable_mutex);
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if (mma8452_idev->input->users)
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mma8452_idev->input->open(mma8452_idev->input);
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mutex_unlock(&enable_mutex);
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dprintk(DEBUG_CONTROL_INFO, "mma enable setting active \n");
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}
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} else {
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mutex_lock(&init_mutex);
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enable_id = 0;
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mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
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error = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
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assert(error==0);
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mutex_unlock(&init_mutex);
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if(!error) {
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mutex_lock(&enable_mutex);
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if (mma8452_idev->input->users)
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mma8452_idev->input->close(mma8452_idev->input);
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mutex_unlock(&enable_mutex);
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dprintk(DEBUG_CONTROL_INFO, "mma enable setting inactive \n");
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}
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}
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return count;
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exit:
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return error;
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}
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static ssize_t mma8452_delay_store(struct device *dev,struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long data;
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int error;
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error = strict_strtoul(buf, 10, &data);
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if (error)
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return error;
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if (data > POLL_INTERVAL_MAX)
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data = POLL_INTERVAL_MAX;
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mma8452_idev->poll_interval = data;
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return count;
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}
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static DEVICE_ATTR(enable, 0664,
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NULL, mma8452_enable_store);
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static DEVICE_ATTR(delay, 0664,
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NULL, mma8452_delay_store);
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static struct attribute *mma8452_attributes[] = {
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&dev_attr_enable.attr,
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&dev_attr_delay.attr,
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NULL
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};
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static struct attribute_group mma8452_attribute_group = {
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.attrs = mma8452_attributes
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};
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/***************************************************************
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*
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* Initialization function
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*/
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static int mma8452_init_client(struct i2c_client *client)
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{
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int result;
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dprintk(DEBUG_INIT, "mma8452 device init\n");
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mutex_lock(&init_mutex);
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mma_status.ctl_reg1 = 0x20;
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result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(result==0);
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mma_status.mode = MODE_2G;
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result = i2c_smbus_write_byte_data(client, MMA8452_XYZ_DATA_CFG, mma_status.mode);
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assert(result==0);
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mma_status.ctl_reg1 |= 0x01;
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result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(result==0);
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mutex_unlock(&init_mutex);
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msleep(MODE_CHANGE_DELAY_MS);
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dprintk(DEBUG_INIT, "mma8452 device init end\n");
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return result;
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}
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/***************************************************************
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*
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* read sensor data from mma8452
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*
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***************************************************************/
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static int mma8452_read_data(short *x, short *y, short *z) {
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u8 tmp_data[7];
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if (i2c_smbus_read_i2c_block_data(mma8452_i2c_client,MMA8452_OUT_X_MSB,7,tmp_data) < 7) {
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dev_err(&mma8452_i2c_client->dev, "i2c block read failed\n");
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return -3;
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}
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*x = ((tmp_data[0] << 8) & 0xff00) | tmp_data[1];
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*y = ((tmp_data[2] << 8) & 0xff00) | tmp_data[3];
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*z = ((tmp_data[4] << 8) & 0xff00) | tmp_data[5];
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*x = (short)(*x) >> 4;
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*y = (short)(*y) >> 4;
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*z = (short)(*z) >> 4;
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if (mma_status.mode == MODE_4G){
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(*x)=(*x)<<1;
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(*y)=(*y)<<1;
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(*z)=(*z)<<1;
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}
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else if (mma_status.mode == MODE_8G){
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(*x)=(*x)<<2;
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(*y)=(*y)<<2;
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(*z)=(*z)<<2;
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}
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return 0;
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}
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static void report_abs(void)
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{
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short x,y,z;
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int result;
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result = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_STATUS);
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if (!(result & 0x08)) {
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dprintk(DEBUG_DATA_INFO, "mma8452 check new data\n");
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return; /* wait for new data */
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}
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if (mma8452_read_data(&x,&y,&z) != 0) {
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dprintk(DEBUG_DATA_INFO, "mma8452 no data");
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return;
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}
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dprintk(DEBUG_DATA_INFO, "x= 0x%hx, y = 0x%hx, z = 0x%hx\n", x, y, z);
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input_report_abs(mma8452_idev->input, ABS_X, x);
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input_report_abs(mma8452_idev->input, ABS_Y, y);
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input_report_abs(mma8452_idev->input, ABS_Z, z);
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input_sync(mma8452_idev->input);
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}
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static void mma8452_dev_poll(struct input_polled_dev *dev)
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{
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report_abs();
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}
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static void mma8452_resume_events (struct work_struct *work)
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{
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int result;
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mutex_lock(&init_mutex);
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mma_status.ctl_reg1 = 0x20;
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result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(result==0);
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mma_status.mode = MODE_2G;
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result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_XYZ_DATA_CFG, mma_status.mode);
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assert(result==0);
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if (1 == enable_id) {
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mma_status.ctl_reg1 |= 0x01;
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result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(result==0);
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}
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mutex_unlock(&init_mutex);
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msleep(MODE_CHANGE_DELAY_MS);
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mutex_lock(&enable_mutex);
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if (mma8452_idev->input->users)
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mma8452_idev->input->open(mma8452_idev->input);
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mutex_unlock(&enable_mutex);
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}
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void mma8452_early_suspend(struct early_suspend *h)
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{
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int result;
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dprintk(DEBUG_SUSPEND, "mma8452 early suspend");
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flush_workqueue(mma8452_resume_wq);
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mutex_lock(&enable_mutex);
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if (mma8452_idev->input->users)
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mma8452_idev->input->close(mma8452_idev->input);
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mutex_unlock(&enable_mutex);
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mutex_lock(&init_mutex);
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mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
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result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
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assert(result==0);
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mutex_unlock(&init_mutex);
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dprintk(DEBUG_SUSPEND, "mma8452 early suspend end");
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return ;
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}
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static void mma8452_late_resume(struct early_suspend *h) //(struct i2c_client *client)
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{
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int result;
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dprintk(DEBUG_SUSPEND, "mma8452 late resume");
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if (NORMAL_STANDBY == standby_type) {
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mutex_lock(&init_mutex);
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if (1 == enable_id) {
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mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
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mma_status.ctl_reg1 |= 0x01;
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result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
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assert(result==0);
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}
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mutex_unlock(&init_mutex);
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|
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mutex_lock(&enable_mutex);
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if (mma8452_idev->input->users)
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mma8452_idev->input->open(mma8452_idev->input);
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mutex_unlock(&enable_mutex);
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} else if (SUPER_STANDBY == standby_type) {
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queue_work(mma8452_resume_wq, &mma8452_resume_work);
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}
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|
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dprintk(DEBUG_SUSPEND, "mma8452 late resume end");
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return ;
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}
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#else
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#ifdef CONFIG_PM
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static int mma8452_resume(struct i2c_client *client)
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{
|
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int result;
|
|
|
|
dprintk(DEBUG_SUSPEND, "mma8452 resume");
|
|
|
|
if (NORMAL_STANDBY == standby_type) {
|
|
mutex_lock(&init_mutex);
|
|
if (1 == enable_id) {
|
|
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
|
|
mma_status.ctl_reg1 |= 0x01;
|
|
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1, mma_status.ctl_reg1);
|
|
assert(result==0);
|
|
}
|
|
mutex_unlock(&init_mutex);
|
|
|
|
mutex_lock(&enable_mutex);
|
|
if (mma8452_idev->input->users)
|
|
mma8452_idev->input->open(mma8452_idev->input);
|
|
mutex_unlock(&enable_mutex);
|
|
} else if (SUPER_STANDBY == standby_type) {
|
|
queue_work(mma8452_resume_wq, &mma8452_resume_work);
|
|
}
|
|
|
|
dprintk(DEBUG_SUSPEND, "mma8452 resume end");
|
|
return 0;
|
|
}
|
|
|
|
static int mma8452_suspend(struct i2c_client *client, pm_message_t mesg)
|
|
{
|
|
int result;
|
|
|
|
dprintk(DEBUG_SUSPEND, "mma8452 suspend");
|
|
|
|
flush_workqueue(mma8452_resume_wq);
|
|
|
|
mutex_lock(&enable_mutex);
|
|
if (mma8452_idev->input->users)
|
|
mma8452_idev->input->close(mma8452_idev->input);
|
|
mutex_unlock(&enable_mutex);
|
|
|
|
mutex_lock(&init_mutex);
|
|
if (1 == enable_id) {
|
|
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1);
|
|
result = i2c_smbus_write_byte_data(mma8452_i2c_client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
|
|
assert(result==0);
|
|
}
|
|
mutex_unlock(&init_mutex);
|
|
|
|
dprintk(DEBUG_SUSPEND, "mma8452 suspend end");
|
|
return 0;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
static void mma8452_init_events (struct work_struct *work)
|
|
{
|
|
mma8452_init_client(mma8452_i2c_client);
|
|
}
|
|
|
|
static int mma8452_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int result;
|
|
struct input_dev *idev;
|
|
struct i2c_adapter *adapter;
|
|
|
|
dprintk(DEBUG_INIT, "mma8452 probe i2c address is %d \n",i2c_address[i2c_num-1]);
|
|
client->addr =i2c_address[i2c_num-1];
|
|
|
|
mma8452_i2c_client = client;
|
|
adapter = to_i2c_adapter(client->dev.parent);
|
|
result = i2c_check_functionality(adapter,
|
|
I2C_FUNC_SMBUS_BYTE |
|
|
I2C_FUNC_SMBUS_BYTE_DATA);
|
|
assert(result);
|
|
|
|
mutex_init(&init_mutex);
|
|
mutex_init(&enable_mutex);
|
|
|
|
mma8452_init_wq = create_singlethread_workqueue("mma8452_init");
|
|
if (mma8452_init_wq == NULL) {
|
|
printk("create mma8452_init_wq fail!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Initialize the MMA8452 chip */
|
|
queue_work(mma8452_init_wq, &mma8452_init_work);
|
|
|
|
hwmon_dev = hwmon_device_register(&client->dev);
|
|
assert(!(IS_ERR(hwmon_dev)));
|
|
|
|
dev_info(&client->dev, "build time %s %s\n", __DATE__, __TIME__);
|
|
|
|
|
|
/*input poll device register */
|
|
mma8452_idev = input_allocate_polled_device();
|
|
if (!mma8452_idev) {
|
|
dev_err(&client->dev, "alloc poll device failed!\n");
|
|
result = -ENOMEM;
|
|
return result;
|
|
}
|
|
mma8452_idev->poll = mma8452_dev_poll;
|
|
mma8452_idev->poll_interval = POLL_INTERVAL;
|
|
mma8452_idev->poll_interval_max = POLL_INTERVAL_MAX;
|
|
idev = mma8452_idev->input;
|
|
idev->name = MMA8452_DRV_NAME;
|
|
idev->id.bustype = BUS_I2C;
|
|
idev->evbit[0] = BIT_MASK(EV_ABS);
|
|
|
|
input_set_abs_params(idev, ABS_X, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
|
|
input_set_abs_params(idev, ABS_Y, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
|
|
input_set_abs_params(idev, ABS_Z, -8192, 8191, INPUT_FUZZ, INPUT_FLAT);
|
|
result = input_register_polled_device(mma8452_idev);
|
|
mma8452_idev->input->close(mma8452_idev->input);
|
|
if (result) {
|
|
dev_err(&client->dev, "register poll device failed!\n");
|
|
return result;
|
|
}
|
|
result = sysfs_create_group(&mma8452_idev->input->dev.kobj, &mma8452_attribute_group);
|
|
|
|
mma8452_resume_wq = create_singlethread_workqueue("mma8452_resume");
|
|
if (mma8452_resume_wq == NULL) {
|
|
printk("create mma8452_resume_wq fail!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
dprintk(DEBUG_INIT, "==register_early_suspend =\n");
|
|
mma8452_data = kzalloc(sizeof(*mma8452_data), GFP_KERNEL);
|
|
if (mma8452_data == NULL) {
|
|
result = -ENOMEM;
|
|
goto err_alloc_data_failed;
|
|
}
|
|
|
|
mma8452_data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 3;
|
|
mma8452_data->early_suspend.suspend = mma8452_early_suspend;
|
|
mma8452_data->early_suspend.resume = mma8452_late_resume;
|
|
register_early_suspend(&mma8452_data->early_suspend);
|
|
#endif
|
|
dprintk(DEBUG_INIT, "mma8452 probe end\n");
|
|
return result;
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
err_alloc_data_failed:
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
static int mma8452_remove(struct i2c_client *client)
|
|
{
|
|
int result;
|
|
mutex_lock(&init_mutex);
|
|
mma_status.ctl_reg1 = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG1);
|
|
result = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,mma_status.ctl_reg1 & 0xFE);
|
|
assert(result==0);
|
|
mutex_unlock(&init_mutex);
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
unregister_early_suspend(&mma8452_data->early_suspend);
|
|
#endif
|
|
cancel_work_sync(&mma8452_resume_work);
|
|
destroy_workqueue(mma8452_resume_wq);
|
|
sysfs_remove_group(&mma8452_idev->input->dev.kobj, &mma8452_attribute_group);
|
|
mma8452_idev->input->close(mma8452_idev->input);
|
|
input_unregister_polled_device(mma8452_idev);
|
|
input_free_polled_device(mma8452_idev);
|
|
hwmon_device_unregister(hwmon_dev);
|
|
cancel_work_sync(&mma8452_init_work);
|
|
destroy_workqueue(mma8452_init_wq);
|
|
i2c_set_clientdata(client, NULL);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static const struct i2c_device_id mma8452_id[] = {
|
|
{ MMA8452_DRV_NAME, 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, mma8452_id);
|
|
|
|
static struct i2c_driver mma8452_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = MMA8452_DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = "allwinner,sun50i-gsensor-para",
|
|
},
|
|
|
|
.probe = mma8452_probe,
|
|
.remove = mma8452_remove,
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
#else
|
|
#ifdef CONFIG_PM
|
|
.suspend = mma8452_suspend,
|
|
.resume = mma8452_resume,
|
|
#endif
|
|
#endif
|
|
.id_table = mma8452_id,
|
|
.detect = gsensor_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
static int __init mma8452_init(void)
|
|
{
|
|
/* register driver */
|
|
int res;
|
|
dprintk(DEBUG_INIT, "======%s=========. \n", __func__);
|
|
if (input_fetch_sysconfig_para(&(gsensor_info.input_type))) {
|
|
printk("%s: err.\n", __func__);
|
|
return -1;
|
|
} else{
|
|
res = input_init_platform_resource(&(gsensor_info.input_type));
|
|
if (0 != res){
|
|
printk("%s:ctp_ops.init_platform_resource err. \n", __func__);
|
|
}
|
|
}
|
|
twi_id = gsensor_info.twi_id;
|
|
|
|
dprintk(DEBUG_INIT, "%s i2c twi is %d \n", __func__, twi_id);
|
|
input_set_power_enable(&(gsensor_info.input_type),1);
|
|
|
|
res = i2c_add_driver(&mma8452_driver);
|
|
if (res < 0) {
|
|
printk(KERN_INFO "add mma8452 i2c driver failed\n");
|
|
return -ENODEV;
|
|
}
|
|
dprintk(DEBUG_INIT, "add mma8452 i2c driver\n");
|
|
|
|
return (res);
|
|
}
|
|
|
|
static void __exit mma8452_exit(void)
|
|
{
|
|
dprintk(DEBUG_INIT, "remove mma8452 i2c driver.\n");
|
|
i2c_del_driver(&mma8452_driver);
|
|
input_set_power_enable(&(gsensor_info.input_type),0);
|
|
}
|
|
|
|
MODULE_AUTHOR("Chen Gang <gang.chen@freescale.com>");
|
|
MODULE_DESCRIPTION("MMA8452 3-Axis Orientation/Motion Detection Sensor driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("1.1");
|
|
|
|
module_init(mma8452_init);
|
|
module_exit(mma8452_exit);
|
|
|