/* drivers/input/misc/cm3217.c - cm3217 optical sensors driver * * Copyright (C) 2011 Capella Microsystems Inc. * Author: Frank Hsieh * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define D(x...) pr_info(x) #define I2C_RETRY_COUNT 10 #define LS_POLLING_DELAY 500 static void report_do_work(struct work_struct *w); static DECLARE_DELAYED_WORK(report_work, report_do_work); struct cm3217_info { struct class *cm3217_class; struct device *ls_dev; struct input_dev *ls_input_dev; struct early_suspend early_suspend; struct i2c_client *i2c_client; struct workqueue_struct *lp_wq; int als_enable; int als_enabled_before_suspend; uint16_t *adc_table; uint16_t cali_table[10]; int irq; int ls_calibrate; int (*power) (int, uint8_t); /* power to the chip */ uint32_t als_kadc; uint32_t als_gadc; uint16_t golden_adc; int lightsensor_opened; int current_level; uint16_t current_adc; int polling_delay; }; struct cm3217_info *lp_info; int enable_log; int fLevel = -1; static struct mutex als_enable_mutex, als_disable_mutex, als_get_adc_mutex; static int lightsensor_enable(struct cm3217_info *lpi); static int lightsensor_disable(struct cm3217_info *lpi); int32_t als_kadc; static int I2C_RxData(uint16_t slaveAddr, uint8_t *rxData, int length) { uint8_t loop_i; struct i2c_msg msgs[] = { { .addr = slaveAddr, .flags = I2C_M_RD, .len = length, .buf = rxData, }, }; for (loop_i = 0; loop_i < I2C_RETRY_COUNT; loop_i++) { if (i2c_transfer(lp_info->i2c_client->adapter, msgs, 1) > 0) break; msleep(10); } if (loop_i >= I2C_RETRY_COUNT) { printk(KERN_ERR "[ERR][CM3217 error] %s retry over %d\n", __func__, I2C_RETRY_COUNT); return -EIO; } return 0; } static int I2C_TxData(uint16_t slaveAddr, uint8_t *txData, int length) { uint8_t loop_i; struct i2c_msg msg[] = { { .addr = slaveAddr, .flags = 0, .len = length, .buf = txData, }, }; for (loop_i = 0; loop_i < I2C_RETRY_COUNT; loop_i++) { if (i2c_transfer(lp_info->i2c_client->adapter, msg, 1) > 0) break; msleep(10); } if (loop_i >= I2C_RETRY_COUNT) { printk(KERN_ERR "[ERR][CM3217 error] %s retry over %d\n", __func__, I2C_RETRY_COUNT); return -EIO; } return 0; } static int _cm3217_I2C_Read_Byte(uint16_t slaveAddr, uint8_t *pdata) { uint8_t buffer = 0; int ret = 0; if (pdata == NULL) return -EFAULT; ret = I2C_RxData(slaveAddr, &buffer, 1); if (ret < 0) { pr_err("[ERR][CM3217 error]%s: I2C_RxData fail, slave addr: 0x%x\n", __func__, slaveAddr); return ret; } *pdata = buffer; #if 0 /* Debug use */ printk(KERN_DEBUG "[CM3217] %s: I2C_RxData[0x%x] = 0x%x\n", __func__, slaveAddr, buffer); #endif return ret; } static int _cm3217_I2C_Write_Byte(uint16_t SlaveAddress, uint8_t data) { char buffer[2]; int ret = 0; #if 0 /* Debug use */ printk(KERN_DEBUG "[CM3217] %s: _cm3217_I2C_Write_Byte[0x%x, 0x%x, 0x%x]\n", __func__, SlaveAddress, cmd, data); #endif buffer[0] = data; ret = I2C_TxData(SlaveAddress, buffer, 1); if (ret < 0) { pr_err("[ERR][CM3217 error]%s: I2C_TxData fail\n", __func__); return -EIO; } return ret; } static int get_ls_adc_value(uint16_t *als_step, bool resume) { uint8_t lsb, msb; int ret = 0; struct cm3217_info *lpi = lp_info; if (als_step == NULL) return -EFAULT; /* Read ALS data: LSB */ ret = _cm3217_I2C_Read_Byte(ALS_R_LSB_addr, &lsb); if (ret < 0) { pr_err("[LS][CM3217 error]%s: _cm3217_I2C_Read_Byte LSB fail\n", __func__); return -EIO; } /* Read ALS data: MSB */ ret = _cm3217_I2C_Read_Byte(ALS_R_MSB_addr, &msb); if (ret < 0) { pr_err("[LS][CM3217 error]%s: _cm3217_I2C_Read_Byte MSB fail\n", __func__); return -EIO; } *als_step = (uint16_t) msb; *als_step <<= 8; *als_step |= (uint16_t) lsb; D("[LS][CM3217] %s: raw adc = 0x%X\n", __func__, *als_step); if (!lpi->ls_calibrate) { *als_step = (*als_step) * lpi->als_gadc / lpi->als_kadc; if (*als_step > 0xFFFF) *als_step = 0xFFFF; } return ret; } static void report_lsensor_input_event(struct cm3217_info *lpi, bool resume) { uint16_t adc_value = 0; int level = 0, i, ret = 0; mutex_lock(&als_get_adc_mutex); ret = get_ls_adc_value(&adc_value, resume); if (lpi->ls_calibrate) { for (i = 0; i < 10; i++) { if (adc_value <= (*(lpi->cali_table + i))) { level = i; if (*(lpi->cali_table + i)) break; } /* avoid i = 10, because 'cali_table' of size is 10 */ if (i == 9) { level = i; break; } } } else { for (i = 0; i < 10; i++) { if (adc_value <= (*(lpi->adc_table + i))) { level = i; if (*(lpi->adc_table + i)) break; } /* avoid i = 10, because 'cali_table' of size is 10 */ if (i == 9) { level = i; break; } } } if ((i == 0) || (adc_value == 0)) D("[LS][CM3217] %s: ADC=0x%03X, Level=%d, l_thd equal 0, " "h_thd = 0x%x\n", __func__, adc_value, level, *(lpi->cali_table + i)); else D("[LS][CM3217] %s: ADC=0x%03X, Level=%d, l_thd = 0x%x, " "h_thd = 0x%x\n", __func__, adc_value, level, *(lpi->cali_table + (i - 1)) + 1, *(lpi->cali_table + i)); lpi->current_level = level; lpi->current_adc = adc_value; /* D("[CM3217] %s: *(lpi->cali_table + (i - 1)) + 1 = 0x%X, " "*(lpi->cali_table + i) = 0x%x\n", __func__, *(lpi->cali_table + (i - 1)) + 1, *(lpi->cali_table + i)); */ if (fLevel >= 0) { D("[LS][CM3217] L-sensor force level enable level=%d " "fLevel=%d\n", level, fLevel); level = fLevel; } input_report_abs(lpi->ls_input_dev, ABS_MISC, level); input_sync(lpi->ls_input_dev); mutex_unlock(&als_get_adc_mutex); } static void report_do_work(struct work_struct *work) { struct cm3217_info *lpi = lp_info; if (enable_log) D("[CM3217] %s\n", __func__); report_lsensor_input_event(lpi, 0); queue_delayed_work(lpi->lp_wq, &report_work, lpi->polling_delay); } static int als_power(int enable) { struct cm3217_info *lpi = lp_info; if (lpi->power) lpi->power(LS_PWR_ON, 1); return 0; } void lightsensor_set_kvalue(struct cm3217_info *lpi) { if (!lpi) { pr_err("[LS][CM3217 error]%s: ls_info is empty\n", __func__); return; } D("[LS][CM3217] %s: ALS calibrated als_kadc=0x%x\n", __func__, als_kadc); if (als_kadc >> 16 == ALS_CALIBRATED) lpi->als_kadc = als_kadc & 0xFFFF; else { lpi->als_kadc = 0; D("[LS][CM3217] %s: no ALS calibrated\n", __func__); } if (lpi->als_kadc && lpi->golden_adc > 0) { lpi->als_kadc = (lpi->als_kadc > 0 && lpi->als_kadc < 0x1000) ? lpi->als_kadc : lpi->golden_adc; lpi->als_gadc = lpi->golden_adc; } else { lpi->als_kadc = 1; lpi->als_gadc = 1; } D("[LS][CM3217] %s: als_kadc=0x%x, als_gadc=0x%x\n", __func__, lpi->als_kadc, lpi->als_gadc); } static int lightsensor_update_table(struct cm3217_info *lpi) { uint32_t tmpData[10]; int i; for (i = 0; i < 10; i++) { tmpData[i] = (uint32_t) (*(lpi->adc_table + i)) * lpi->als_kadc / lpi->als_gadc; if (tmpData[i] <= 0xFFFF) lpi->cali_table[i] = (uint16_t) tmpData[i]; else lpi->cali_table[i] = 0xFFFF; D("[LS][CM3217] %s: Calibrated adc_table: data[%d], %x\n", __func__, i, lpi->cali_table[i]); } return 0; } static int lightsensor_enable(struct cm3217_info *lpi) { int ret = 0; uint8_t cmd = 0; mutex_lock(&als_enable_mutex); D("[LS][CM3217] %s\n", __func__); cmd = (CM3217_ALS_IT_2_T | CM3217_ALS_BIT5_Default_1 | CM3217_ALS_WDM_DEFAULT_1); ret = _cm3217_I2C_Write_Byte(ALS_W_CMD1_addr, cmd); if (ret < 0) pr_err("[LS][CM3217 error]%s: set auto light sensor fail\n", __func__); else { msleep(50); /* wait for 50 ms for the first report adc */ /* report an invalid value first to ensure we * trigger an event when adc_level is zero. */ input_report_abs(lpi->ls_input_dev, ABS_MISC, -1); input_sync(lpi->ls_input_dev); /* resume, IOCTL and DEVICE_ATTR */ report_lsensor_input_event(lpi, 1); lpi->als_enable = 1; } queue_delayed_work(lpi->lp_wq, &report_work, lpi->polling_delay); lpi->als_enable = 1; mutex_unlock(&als_enable_mutex); return ret; } static int lightsensor_disable(struct cm3217_info *lpi) { int ret = 0; char cmd = 0; mutex_lock(&als_disable_mutex); D("[LS][CM3217] %s\n", __func__); cmd = (CM3217_ALS_IT_2_T | CM3217_ALS_BIT5_Default_1 | CM3217_ALS_WDM_DEFAULT_1 | CM3217_ALS_SD); ret = _cm3217_I2C_Write_Byte(ALS_W_CMD1_addr, cmd); if (ret < 0) pr_err("[LS][CM3217 error]%s: disable auto light sensor fail\n", __func__); else { lpi->als_enable = 0; } cancel_delayed_work(&report_work); lpi->als_enable = 0; mutex_unlock(&als_disable_mutex); return ret; } static int lightsensor_open(struct inode *inode, struct file *file) { struct cm3217_info *lpi = lp_info; int rc = 0; D("[LS][CM3217] %s\n", __func__); if (lpi->lightsensor_opened) { pr_err("[LS][CM3217 error]%s: already opened\n", __func__); rc = -EBUSY; } lpi->lightsensor_opened = 1; return rc; } static int lightsensor_release(struct inode *inode, struct file *file) { struct cm3217_info *lpi = lp_info; D("[LS][CM3217] %s\n", __func__); lpi->lightsensor_opened = 0; return 0; } static long lightsensor_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { int rc, val; struct cm3217_info *lpi = lp_info; /* D("[CM3217] %s cmd %d\n", __func__, _IOC_NR(cmd)); */ switch (cmd) { case LIGHTSENSOR_IOCTL_ENABLE: if (get_user(val, (unsigned long __user *)arg)) { rc = -EFAULT; break; } D("[LS][CM3217] %s LIGHTSENSOR_IOCTL_ENABLE, value = %d\n", __func__, val); rc = val ? lightsensor_enable(lpi) : lightsensor_disable(lpi); break; case LIGHTSENSOR_IOCTL_GET_ENABLED: val = lpi->als_enable; D("[LS][CM3217] %s LIGHTSENSOR_IOCTL_GET_ENABLED, enabled %d\n", __func__, val); rc = put_user(val, (unsigned long __user *)arg); break; default: pr_err("[LS][CM3217 error]%s: invalid cmd %d\n", __func__, _IOC_NR(cmd)); rc = -EINVAL; } return rc; } static const struct file_operations lightsensor_fops = { .owner = THIS_MODULE, .open = lightsensor_open, .release = lightsensor_release, .unlocked_ioctl = lightsensor_ioctl }; static struct miscdevice lightsensor_misc = { .minor = MISC_DYNAMIC_MINOR, .name = "lightsensor", .fops = &lightsensor_fops }; static ssize_t ls_adc_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret; struct cm3217_info *lpi = lp_info; D("[LS][CM3217] %s: ADC = 0x%04X, Level = %d\n", __func__, lpi->current_adc, lpi->current_level); ret = sprintf(buf, "ADC[0x%04X] => level %d\n", lpi->current_adc, lpi->current_level); return ret; } static DEVICE_ATTR(ls_adc, 0664, ls_adc_show, NULL); static ssize_t ls_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret = 0; struct cm3217_info *lpi = lp_info; ret = sprintf(buf, "Light sensor Auto Enable = %d\n", lpi->als_enable); return ret; } static ssize_t ls_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret = 0; int ls_auto; struct cm3217_info *lpi = lp_info; ls_auto = -1; sscanf(buf, "%d", &ls_auto); if (ls_auto != 0 && ls_auto != 1) return -EINVAL; if (ls_auto) ret = lightsensor_enable(lpi); else ret = lightsensor_disable(lpi); D("[LS][CM3217] %s: lpi->als_enable = %d, lpi->ls_calibrate = %d, " "ls_auto=%d\n", __func__, lpi->als_enable, lpi->ls_calibrate, ls_auto); if (ret < 0) pr_err("[LS][CM3217 error]%s: set auto light sensor fail\n", __func__); return count; } static DEVICE_ATTR(ls_auto, 0664, ls_enable_show, ls_enable_store); static ssize_t ls_kadc_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cm3217_info *lpi = lp_info; int ret; ret = sprintf(buf, "kadc = 0x%x", lpi->als_kadc); return ret; } static ssize_t ls_kadc_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct cm3217_info *lpi = lp_info; int kadc_temp = 0; sscanf(buf, "%d", &kadc_temp); /* if (kadc_temp <= 0 || lpi->golden_adc <= 0) { printk(KERN_ERR "[LS][CM3217 error] %s: kadc_temp=0x%x, " "als_gadc=0x%x\n", __func__, kadc_temp, lpi->golden_adc); return -EINVAL; } */ mutex_lock(&als_get_adc_mutex); if (kadc_temp != 0) { lpi->als_kadc = kadc_temp; if (lpi->als_gadc != 0) { if (lightsensor_update_table(lpi) < 0) printk(KERN_ERR "[LS][CM3217 error] %s: " "update ls table fail\n", __func__); } else { printk(KERN_INFO "[LS]%s: als_gadc =0x%x wait to be set\n", __func__, lpi->als_gadc); } } else { printk(KERN_INFO "[LS]%s: als_kadc can't be set to zero\n", __func__); } mutex_unlock(&als_get_adc_mutex); return count; } static DEVICE_ATTR(ls_kadc, 0664, ls_kadc_show, ls_kadc_store); static ssize_t ls_gadc_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cm3217_info *lpi = lp_info; int ret; ret = sprintf(buf, "gadc = 0x%x\n", lpi->als_gadc); return ret; } static ssize_t ls_gadc_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct cm3217_info *lpi = lp_info; int gadc_temp = 0; sscanf(buf, "%d", &gadc_temp); /* if (gadc_temp <= 0 || lpi->golden_adc <= 0) { printk(KERN_ERR "[LS][CM3217 error] %s: kadc_temp=0x%x, " "als_gadc=0x%x\n", __func__, kadc_temp, lpi->golden_adc); return -EINVAL; } */ mutex_lock(&als_get_adc_mutex); if (gadc_temp != 0) { lpi->als_gadc = gadc_temp; if (lpi->als_kadc != 0) { if (lightsensor_update_table(lpi) < 0) printk(KERN_ERR "[LS][CM3217 error] %s: " "update ls table fail\n", __func__); } else { printk(KERN_INFO "[LS]%s: als_kadc =0x%x wait to be set\n", __func__, lpi->als_kadc); } } else { printk(KERN_INFO "[LS]%s: als_gadc can't be set to zero\n", __func__); } mutex_unlock(&als_get_adc_mutex); return count; } static DEVICE_ATTR(ls_gadc, 0664, ls_gadc_show, ls_gadc_store); static ssize_t ls_adc_table_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned length = 0; int i; for (i = 0; i < 10; i++) { length += sprintf(buf + length, "[CM3217]Get adc_table[%d] = 0x%x ; %d, " "Get cali_table[%d] = 0x%x ; %d,\n", i, *(lp_info->adc_table + i), *(lp_info->adc_table + i), i, *(lp_info->cali_table + i), *(lp_info->cali_table + i)); } return length; } static ssize_t ls_adc_table_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct cm3217_info *lpi = lp_info; char *token[10]; unsigned long tempdata[10]; int i, r; printk(KERN_INFO "[LS][CM3217]%s\n", buf); for (i = 0; i < 10; i++) { token[i] = strsep((char **)&buf, " "); r = kstrtoul(token[i], 16, &tempdata[i]); if (tempdata[i] < 1 || tempdata[i] > 0xffff || r) { printk(KERN_ERR "[LS][CM3217 error] adc_table[%d] = " "0x%lx Err\n", i, tempdata[i]); return count; } } mutex_lock(&als_get_adc_mutex); for (i = 0; i < 10; i++) { lpi->adc_table[i] = tempdata[i]; printk(KERN_INFO "[LS][CM3217]Set lpi->adc_table[%d] = 0x%x\n", i, *(lp_info->adc_table + i)); } if (lightsensor_update_table(lpi) < 0) printk(KERN_ERR "[LS][CM3217 error] %s: update ls table fail\n", __func__); mutex_unlock(&als_get_adc_mutex); D("[LS][CM3217] %s\n", __func__); return count; } static DEVICE_ATTR(ls_adc_table, 0664, ls_adc_table_show, ls_adc_table_store); static uint8_t ALS_CONF1; static ssize_t ls_conf1_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "ALS_CONF1 = %x\n", ALS_CONF1); } static ssize_t ls_conf1_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int value = 0; sscanf(buf, "0x%x", &value); ALS_CONF1 = value; printk(KERN_INFO "[LS]set ALS_CONF1 = %x\n", ALS_CONF1); _cm3217_I2C_Write_Byte(ALS_W_CMD1_addr, ALS_CONF1); return count; } static DEVICE_ATTR(ls_conf1, 0664, ls_conf1_show, ls_conf1_store); static uint8_t ALS_CONF2; static ssize_t ls_conf2_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "ALS_CONF2 = %x\n", ALS_CONF2); } static ssize_t ls_conf2_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int value = 0; sscanf(buf, "0x%x", &value); ALS_CONF2 = value; printk(KERN_INFO "[LS]set ALS_CONF2 = %x\n", ALS_CONF2); _cm3217_I2C_Write_Byte(ALS_W_CMD2_addr, ALS_CONF2); return count; } static DEVICE_ATTR(ls_conf2, 0664, ls_conf2_show, ls_conf2_store); static ssize_t ls_fLevel_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "fLevel = %d\n", fLevel); } static ssize_t ls_fLevel_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct cm3217_info *lpi = lp_info; int value = 0; sscanf(buf, "%d", &value); (value >= 0) ? (value = min(value, 10)) : (value = max(value, -1)); fLevel = value; input_report_abs(lpi->ls_input_dev, ABS_MISC, fLevel); input_sync(lpi->ls_input_dev); printk(KERN_INFO "[LS]set fLevel = %d\n", fLevel); msleep(1000); fLevel = -1; return count; } static DEVICE_ATTR(ls_flevel, 0664, ls_fLevel_show, ls_fLevel_store); static int lightsensor_setup(struct cm3217_info *lpi) { int ret; lpi->ls_input_dev = input_allocate_device(); if (!lpi->ls_input_dev) { pr_err("[LS][CM3217 error]%s: " "could not allocate ls input device\n", __func__); return -ENOMEM; } lpi->ls_input_dev->name = "cm3217-ls"; set_bit(EV_ABS, lpi->ls_input_dev->evbit); input_set_abs_params(lpi->ls_input_dev, ABS_MISC, 0, 9, 0, 0); ret = input_register_device(lpi->ls_input_dev); if (ret < 0) { pr_err("[LS][CM3217 error]%s: " "can not register ls input device\n", __func__); goto err_free_ls_input_device; } ret = misc_register(&lightsensor_misc); if (ret < 0) { pr_err("[LS][CM3217 error]%s: " "can not register ls misc device\n", __func__); goto err_unregister_ls_input_device; } return ret; err_unregister_ls_input_device: input_unregister_device(lpi->ls_input_dev); err_free_ls_input_device: input_free_device(lpi->ls_input_dev); return ret; } static int cm3217_setup(struct cm3217_info *lpi) { int ret = 0; als_power(1); msleep(5); ret = _cm3217_I2C_Write_Byte(ALS_W_CMD2_addr, CM3217_ALS_WDM_DEFAULT_1 | CM3217_ALS_IT_2_T | CM3217_ALS_BIT5_Default_1); if (ret < 0) return ret; ret = _cm3217_I2C_Write_Byte(ALS_W_CMD2_addr, CM3217_ALS_IT_100ms); msleep(10); return ret; } static void cm3217_early_suspend(struct early_suspend *h) { struct cm3217_info *lpi = lp_info; D("[LS][CM3217] %s\n", __func__); lpi->als_enabled_before_suspend = lpi->als_enable; if (lpi->als_enable) lightsensor_disable(lpi); } static void cm3217_late_resume(struct early_suspend *h) { struct cm3217_info *lpi = lp_info; D("[LS][CM3217] %s\n", __func__); if (lpi->als_enabled_before_suspend) lightsensor_enable(lpi); } static int cm3217_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret = 0; struct cm3217_info *lpi; struct cm3217_platform_data *pdata; D("[CM3217] %s\n", __func__); lpi = kzalloc(sizeof(struct cm3217_info), GFP_KERNEL); if (!lpi) return -ENOMEM; /* D("[CM3217] %s: client->irq = %d\n", __func__, client->irq); */ lpi->i2c_client = client; pdata = client->dev.platform_data; if (!pdata) { pr_err("[CM3217 error]%s: Assign platform_data error!!\n", __func__); ret = -EBUSY; goto err_platform_data_null; } lpi->irq = client->irq; i2c_set_clientdata(client, lpi); lpi->adc_table = pdata->levels; lpi->golden_adc = pdata->golden_adc; lpi->power = pdata->power; lpi->polling_delay = msecs_to_jiffies(LS_POLLING_DELAY); lp_info = lpi; mutex_init(&als_enable_mutex); mutex_init(&als_disable_mutex); mutex_init(&als_get_adc_mutex); ret = lightsensor_setup(lpi); if (ret < 0) { pr_err("[LS][CM3217 error]%s: lightsensor_setup error!!\n", __func__); goto err_lightsensor_setup; } /* SET LUX STEP FACTOR HERE * if adc raw value one step = 0.3 lux * the following will set the factor 0.3 = 3/10 * and lpi->golden_adc = 3; * set als_kadc = (ALS_CALIBRATED <<16) | 10; */ als_kadc = (ALS_CALIBRATED << 16) | 10; lpi->golden_adc = 3; /* ls calibrate always set to 1 */ lpi->ls_calibrate = 1; lightsensor_set_kvalue(lpi); ret = lightsensor_update_table(lpi); if (ret < 0) { pr_err("[LS][CM3217 error]%s: update ls table fail\n", __func__); goto err_lightsensor_update_table; } lpi->lp_wq = create_singlethread_workqueue("cm3217_wq"); if (!lpi->lp_wq) { pr_err("[CM3217 error]%s: can't create workqueue\n", __func__); ret = -ENOMEM; goto err_create_singlethread_workqueue; } ret = cm3217_setup(lpi); if (ret < 0) { pr_err("[ERR][CM3217 error]%s: cm3217_setup error!\n", __func__); goto err_cm3217_setup; } lpi->cm3217_class = class_create(THIS_MODULE, "optical_sensors"); if (IS_ERR(lpi->cm3217_class)) { ret = PTR_ERR(lpi->cm3217_class); lpi->cm3217_class = NULL; goto err_create_class; } lpi->ls_dev = device_create(lpi->cm3217_class, NULL, 0, "%s", "lightsensor"); if (unlikely(IS_ERR(lpi->ls_dev))) { ret = PTR_ERR(lpi->ls_dev); lpi->ls_dev = NULL; goto err_create_ls_device; } /* register the attributes */ ret = device_create_file(lpi->ls_dev, &dev_attr_ls_adc); if (ret) goto err_create_ls_device_file; /* register the attributes */ ret = device_create_file(lpi->ls_dev, &dev_attr_ls_auto); if (ret) goto err_create_ls_device_file; /* register the attributes */ ret = device_create_file(lpi->ls_dev, &dev_attr_ls_kadc); if (ret) goto err_create_ls_device_file; ret = device_create_file(lpi->ls_dev, &dev_attr_ls_gadc); if (ret) goto err_create_ls_device_file; ret = device_create_file(lpi->ls_dev, &dev_attr_ls_adc_table); if (ret) goto err_create_ls_device_file; ret = device_create_file(lpi->ls_dev, &dev_attr_ls_conf1); if (ret) goto err_create_ls_device_file; ret = device_create_file(lpi->ls_dev, &dev_attr_ls_conf2); if (ret) goto err_create_ls_device_file; ret = device_create_file(lpi->ls_dev, &dev_attr_ls_flevel); if (ret) goto err_create_ls_device_file; lpi->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1; lpi->early_suspend.suspend = cm3217_early_suspend; lpi->early_suspend.resume = cm3217_late_resume; register_early_suspend(&lpi->early_suspend); lpi->als_enable = 0; lpi->als_enabled_before_suspend = 0; D("[CM3217] %s: Probe success!\n", __func__); return ret; err_create_ls_device_file: device_unregister(lpi->ls_dev); err_create_ls_device: class_destroy(lpi->cm3217_class); err_create_class: err_cm3217_setup: destroy_workqueue(lpi->lp_wq); mutex_destroy(&als_enable_mutex); mutex_destroy(&als_disable_mutex); mutex_destroy(&als_get_adc_mutex); input_unregister_device(lpi->ls_input_dev); input_free_device(lpi->ls_input_dev); err_create_singlethread_workqueue: err_lightsensor_update_table: misc_deregister(&lightsensor_misc); err_lightsensor_setup: err_platform_data_null: kfree(lpi); return ret; } static const struct i2c_device_id cm3217_i2c_id[] = { {CM3217_I2C_NAME, 0}, {} }; static struct i2c_driver cm3217_driver = { .id_table = cm3217_i2c_id, .probe = cm3217_probe, .driver = { .name = CM3217_I2C_NAME, .owner = THIS_MODULE, }, }; static int __init cm3217_init(void) { return i2c_add_driver(&cm3217_driver); } static void __exit cm3217_exit(void) { i2c_del_driver(&cm3217_driver); } module_init(cm3217_init); module_exit(cm3217_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("CM3217 Driver"); MODULE_AUTHOR("Frank Hsieh ");