/* * adm9240.c Part of lm_sensors, Linux kernel modules for hardware * monitoring * * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> * Philip Edelbrock <phil@netroedge.com> * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable * guidance from Jean Delvare * * Driver supports Analog Devices ADM9240 * Dallas Semiconductor DS1780 * National Semiconductor LM81 * * ADM9240 is the reference, DS1780 and LM81 are register compatibles * * Voltage Six inputs are scaled by chip, VID also reported * Temperature Chip temperature to 0.5'C, maximum and max_hysteris * Fans 2 fans, low speed alarm, automatic fan clock divider * Alarms 16-bit map of active alarms * Analog Out 0..1250 mV output * * Chassis Intrusion: clear CI latch with 'echo 1 > chassis_clear' * * Test hardware: Intel SE440BX-2 desktop motherboard --Grant * * LM81 extended temp reading not implemented * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> /* Addresses to scan */ static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD_3(adm9240, ds1780, lm81); /* ADM9240 registers */ #define ADM9240_REG_MAN_ID 0x3e #define ADM9240_REG_DIE_REV 0x3f #define ADM9240_REG_CONFIG 0x40 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) #define ADM9240_REG_INT(nr) (0x41 + (nr)) #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) #define ADM9240_REG_TEMP 0x27 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ #define ADM9240_REG_ANALOG_OUT 0x19 #define ADM9240_REG_CHASSIS_CLEAR 0x46 #define ADM9240_REG_VID_FAN_DIV 0x47 #define ADM9240_REG_I2C_ADDR 0x48 #define ADM9240_REG_VID4 0x49 #define ADM9240_REG_TEMP_CONF 0x4b /* generalised scaling with integer rounding */ static inline int SCALE(long val, int mul, int div) { if (val < 0) return (val * mul - div / 2) / div; else return (val * mul + div / 2) / div; } /* adm9240 internally scales voltage measurements */ static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; static inline unsigned int IN_FROM_REG(u8 reg, int n) { return SCALE(reg, nom_mv[n], 192); } static inline u8 IN_TO_REG(unsigned long val, int n) { return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255); } /* temperature range: -40..125, 127 disables temperature alarm */ static inline s8 TEMP_TO_REG(long val) { return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127); } /* two fans, each with low fan speed limit */ static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) { if (!reg) /* error */ return -1; if (reg == 255) return 0; return SCALE(1350000, 1, reg * div); } /* analog out 0..1250mV */ static inline u8 AOUT_TO_REG(unsigned long val) { return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255); } static inline unsigned int AOUT_FROM_REG(u8 reg) { return SCALE(reg, 1250, 255); } static int adm9240_attach_adapter(struct i2c_adapter *adapter); static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); static void adm9240_init_client(struct i2c_client *client); static int adm9240_detach_client(struct i2c_client *client); static struct adm9240_data *adm9240_update_device(struct device *dev); /* driver data */ static struct i2c_driver adm9240_driver = { .driver = { .name = "adm9240", }, .attach_adapter = adm9240_attach_adapter, .detach_client = adm9240_detach_client, }; /* per client data */ struct adm9240_data { enum chips type; struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; char valid; unsigned long last_updated_measure; unsigned long last_updated_config; u8 in[6]; /* ro in0_input */ u8 in_max[6]; /* rw in0_max */ u8 in_min[6]; /* rw in0_min */ u8 fan[2]; /* ro fan1_input */ u8 fan_min[2]; /* rw fan1_min */ u8 fan_div[2]; /* rw fan1_div, read-only accessor */ s16 temp; /* ro temp1_input, 9-bit sign-extended */ s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ u16 alarms; /* ro alarms */ u8 aout; /* rw aout_output */ u8 vid; /* ro vid */ u8 vrm; /* -- vrm set on startup, no accessor */ }; /*** sysfs accessors ***/ /* temperature */ static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, char *buf) { struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */ } static ssize_t show_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); } static ssize_t set_max(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->temp_max[attr->index] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), data->temp_max[attr->index]); mutex_unlock(&data->update_lock); return count; } static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_max, set_max, 0); static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_max, set_max, 1); /* voltage */ static ssize_t show_in(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], attr->index)); } static ssize_t show_in_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], attr->index)); } static ssize_t show_in_max(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], attr->index)); } static ssize_t set_in_min(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); unsigned long val = simple_strtoul(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_min[attr->index] = IN_TO_REG(val, attr->index); i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), data->in_min[attr->index]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_in_max(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); unsigned long val = simple_strtoul(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_max[attr->index] = IN_TO_REG(val, attr->index); i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), data->in_max[attr->index]); mutex_unlock(&data->update_lock); return count; } #define vin(nr) \ static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ show_in, NULL, nr); \ static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ show_in_min, set_in_min, nr); \ static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ show_in_max, set_in_max, nr); vin(0); vin(1); vin(2); vin(3); vin(4); vin(5); /* fans */ static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], 1 << data->fan_div[attr->index])); } static ssize_t show_fan_min(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], 1 << data->fan_div[attr->index])); } static ssize_t show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); } /* write new fan div, callers must hold data->update_lock */ static void adm9240_write_fan_div(struct i2c_client *client, int nr, u8 fan_div) { u8 reg, old, shift = (nr + 2) * 2; reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); old = (reg >> shift) & 3; reg &= ~(3 << shift); reg |= (fan_div << shift); i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); dev_dbg(&client->dev, "fan%d clock divider changed from %u " "to %u\n", nr + 1, 1 << old, 1 << fan_div); } /* * set fan speed low limit: * * - value is zero: disable fan speed low limit alarm * * - value is below fan speed measurement range: enable fan speed low * limit alarm to be asserted while fan speed too slow to measure * * - otherwise: select fan clock divider to suit fan speed low limit, * measurement code may adjust registers to ensure fan speed reading */ static ssize_t set_fan_min(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); unsigned long val = simple_strtoul(buf, NULL, 10); int nr = attr->index; u8 new_div; mutex_lock(&data->update_lock); if (!val) { data->fan_min[nr] = 255; new_div = data->fan_div[nr]; dev_dbg(&client->dev, "fan%u low limit set disabled\n", nr + 1); } else if (val < 1350000 / (8 * 254)) { new_div = 3; data->fan_min[nr] = 254; dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", nr + 1, FAN_FROM_REG(254, 1 << new_div)); } else { unsigned int new_min = 1350000 / val; new_div = 0; while (new_min > 192 && new_div < 3) { new_div++; new_min /= 2; } if (!new_min) /* keep > 0 */ new_min++; data->fan_min[nr] = new_min; dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); } if (new_div != data->fan_div[nr]) { data->fan_div[nr] = new_div; adm9240_write_fan_div(client, nr, new_div); } i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), data->fan_min[nr]); mutex_unlock(&data->update_lock); return count; } #define fan(nr) \ static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ show_fan, NULL, nr - 1); \ static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ show_fan_div, NULL, nr - 1); \ static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ show_fan_min, set_fan_min, nr - 1); fan(1); fan(2); /* alarms */ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%u\n", data->alarms); } static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { int bitnr = to_sensor_dev_attr(attr)->index; struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); } static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); /* vid */ static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) { struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); } static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); /* analog output */ static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) { struct adm9240_data *data = adm9240_update_device(dev); return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); } static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); unsigned long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->aout = AOUT_TO_REG(val); i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); mutex_unlock(&data->update_lock); return count; } static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); /* chassis_clear */ static ssize_t chassis_clear(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); unsigned long val = simple_strtol(buf, NULL, 10); if (val == 1) { i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); } return count; } static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear); static struct attribute *adm9240_attributes[] = { &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in0_min.dev_attr.attr, &sensor_dev_attr_in0_max.dev_attr.attr, &sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in5_min.dev_attr.attr, &sensor_dev_attr_in5_max.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, &dev_attr_temp1_input.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan1_div.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan1_alarm.dev_attr.attr, &sensor_dev_attr_fan2_input.dev_attr.attr, &sensor_dev_attr_fan2_div.dev_attr.attr, &sensor_dev_attr_fan2_min.dev_attr.attr, &sensor_dev_attr_fan2_alarm.dev_attr.attr, &dev_attr_alarms.attr, &dev_attr_aout_output.attr, &dev_attr_chassis_clear.attr, &dev_attr_cpu0_vid.attr, NULL }; static const struct attribute_group adm9240_group = { .attrs = adm9240_attributes, }; /*** sensor chip detect and driver install ***/ static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) { struct i2c_client *new_client; struct adm9240_data *data; int err = 0; const char *name = ""; u8 man_id, die_rev; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) goto exit; if (!(data = kzalloc(sizeof(*data), GFP_KERNEL))) { err = -ENOMEM; goto exit; } new_client = &data->client; i2c_set_clientdata(new_client, data); new_client->addr = address; new_client->adapter = adapter; new_client->driver = &adm9240_driver; new_client->flags = 0; if (kind == 0) { kind = adm9240; } if (kind < 0) { /* verify chip: reg address should match i2c address */ if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) != address) { dev_err(&adapter->dev, "detect fail: address match, " "0x%02x\n", address); goto exit_free; } /* check known chip manufacturer */ man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); if (man_id == 0x23) { kind = adm9240; } else if (man_id == 0xda) { kind = ds1780; } else if (man_id == 0x01) { kind = lm81; } else { dev_err(&adapter->dev, "detect fail: unknown manuf, " "0x%02x\n", man_id); goto exit_free; } /* successful detect, print chip info */ die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); dev_info(&adapter->dev, "found %s revision %u\n", man_id == 0x23 ? "ADM9240" : man_id == 0xda ? "DS1780" : "LM81", die_rev); } /* either forced or detected chip kind */ if (kind == adm9240) { name = "adm9240"; } else if (kind == ds1780) { name = "ds1780"; } else if (kind == lm81) { name = "lm81"; } /* fill in the remaining client fields and attach */ strlcpy(new_client->name, name, I2C_NAME_SIZE); data->type = kind; mutex_init(&data->update_lock); if ((err = i2c_attach_client(new_client))) goto exit_free; adm9240_init_client(new_client); /* populate sysfs filesystem */ if ((err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group))) goto exit_detach; data->hwmon_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove; } return 0; exit_remove: sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); exit_detach: i2c_detach_client(new_client); exit_free: kfree(data); exit: return err; } static int adm9240_attach_adapter(struct i2c_adapter *adapter) { if (!(adapter->class & I2C_CLASS_HWMON)) return 0; return i2c_probe(adapter, &addr_data, adm9240_detect); } static int adm9240_detach_client(struct i2c_client *client) { struct adm9240_data *data = i2c_get_clientdata(client); int err; hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &adm9240_group); if ((err = i2c_detach_client(client))) return err; kfree(data); return 0; } static void adm9240_init_client(struct i2c_client *client) { struct adm9240_data *data = i2c_get_clientdata(client); u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; data->vrm = vid_which_vrm(); /* need this to report vid as mV */ dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, data->vrm % 10); if (conf & 1) { /* measurement cycle running: report state */ dev_info(&client->dev, "status: config 0x%02x mode %u\n", conf, mode); } else { /* cold start: open limits before starting chip */ int i; for (i = 0; i < 6; i++) { i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(i), 0); i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(i), 255); } i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(0), 255); i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(1), 255); i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(0), 127); i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(1), 127); /* start measurement cycle */ i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); dev_info(&client->dev, "cold start: config was 0x%02x " "mode %u\n", conf, mode); } } static struct adm9240_data *adm9240_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct adm9240_data *data = i2c_get_clientdata(client); int i; mutex_lock(&data->update_lock); /* minimum measurement cycle: 1.75 seconds */ if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) || !data->valid) { for (i = 0; i < 6; i++) /* read voltages */ { data->in[i] = i2c_smbus_read_byte_data(client, ADM9240_REG_IN(i)); } data->alarms = i2c_smbus_read_byte_data(client, ADM9240_REG_INT(0)) | i2c_smbus_read_byte_data(client, ADM9240_REG_INT(1)) << 8; /* read temperature: assume temperature changes less than * 0.5'C per two measurement cycles thus ignore possible * but unlikely aliasing error on lsb reading. --Grant */ data->temp = ((i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP) << 8) | i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF)) / 128; for (i = 0; i < 2; i++) /* read fans */ { data->fan[i] = i2c_smbus_read_byte_data(client, ADM9240_REG_FAN(i)); /* adjust fan clock divider on overflow */ if (data->valid && data->fan[i] == 255 && data->fan_div[i] < 3) { adm9240_write_fan_div(client, i, ++data->fan_div[i]); /* adjust fan_min if active, but not to 0 */ if (data->fan_min[i] < 255 && data->fan_min[i] >= 2) data->fan_min[i] /= 2; } } data->last_updated_measure = jiffies; } /* minimum config reading cycle: 300 seconds */ if (time_after(jiffies, data->last_updated_config + (HZ * 300)) || !data->valid) { for (i = 0; i < 6; i++) { data->in_min[i] = i2c_smbus_read_byte_data(client, ADM9240_REG_IN_MIN(i)); data->in_max[i] = i2c_smbus_read_byte_data(client, ADM9240_REG_IN_MAX(i)); } for (i = 0; i < 2; i++) { data->fan_min[i] = i2c_smbus_read_byte_data(client, ADM9240_REG_FAN_MIN(i)); } data->temp_max[0] = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_MAX(0)); data->temp_max[1] = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_MAX(1)); /* read fan divs and 5-bit VID */ i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); data->fan_div[0] = (i >> 4) & 3; data->fan_div[1] = (i >> 6) & 3; data->vid = i & 0x0f; data->vid |= (i2c_smbus_read_byte_data(client, ADM9240_REG_VID4) & 1) << 4; /* read analog out */ data->aout = i2c_smbus_read_byte_data(client, ADM9240_REG_ANALOG_OUT); data->last_updated_config = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; } static int __init sensors_adm9240_init(void) { return i2c_add_driver(&adm9240_driver); } static void __exit sensors_adm9240_exit(void) { i2c_del_driver(&adm9240_driver); } MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " "Grant Coady <gcoady.lk@gmail.com> and others"); MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); MODULE_LICENSE("GPL"); module_init(sensors_adm9240_init); module_exit(sensors_adm9240_exit);