/* * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives * Copyright (C) 2007-2008, Advanced Micro Devices, Inc. * Copyright (C) 2008 Jordan Crouse * Copyright (C) 2008 Hans de Goede * Derived from the lm83 driver by Jean Delvare * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include /* Indexes for the sysfs hooks */ #define INPUT 0 #define MIN 1 #define MAX 2 #define CONTROL 3 #define OFFSET 3 #define AUTOMIN 4 #define THERM 5 #define HYSTERSIS 6 /* These are unique identifiers for the sysfs functions - unlike the numbers above, these are not also indexes into an array */ #define ALARM 9 #define FAULT 10 /* 7475 Common Registers */ #define REG_VOLTAGE_BASE 0x21 #define REG_TEMP_BASE 0x25 #define REG_TACH_BASE 0x28 #define REG_PWM_BASE 0x30 #define REG_PWM_MAX_BASE 0x38 #define REG_DEVID 0x3D #define REG_VENDID 0x3E #define REG_STATUS1 0x41 #define REG_STATUS2 0x42 #define REG_VOLTAGE_MIN_BASE 0x46 #define REG_VOLTAGE_MAX_BASE 0x47 #define REG_TEMP_MIN_BASE 0x4E #define REG_TEMP_MAX_BASE 0x4F #define REG_TACH_MIN_BASE 0x54 #define REG_PWM_CONFIG_BASE 0x5C #define REG_TEMP_TRANGE_BASE 0x5F #define REG_PWM_MIN_BASE 0x64 #define REG_TEMP_TMIN_BASE 0x67 #define REG_TEMP_THERM_BASE 0x6A #define REG_REMOTE1_HYSTERSIS 0x6D #define REG_REMOTE2_HYSTERSIS 0x6E #define REG_TEMP_OFFSET_BASE 0x70 #define REG_EXTEND1 0x76 #define REG_EXTEND2 0x77 #define REG_CONFIG5 0x7C #define CONFIG5_TWOSCOMP 0x01 #define CONFIG5_TEMPOFFSET 0x02 /* ADT7475 Settings */ #define ADT7475_VOLTAGE_COUNT 2 #define ADT7475_TEMP_COUNT 3 #define ADT7475_TACH_COUNT 4 #define ADT7475_PWM_COUNT 3 /* Macro to read the registers */ #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg)) /* Macros to easily index the registers */ #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2)) #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2)) #define PWM_REG(idx) (REG_PWM_BASE + (idx)) #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx)) #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx)) #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx)) #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx)) #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2)) #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2)) #define TEMP_REG(idx) (REG_TEMP_BASE + (idx)) #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2)) #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2)) #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx)) #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx)) #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx)) #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx)) static unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END }; I2C_CLIENT_INSMOD_1(adt7475); static const struct i2c_device_id adt7475_id[] = { { "adt7475", adt7475 }, { } }; MODULE_DEVICE_TABLE(i2c, adt7475_id); struct adt7475_data { struct device *hwmon_dev; struct mutex lock; unsigned long measure_updated; unsigned long limits_updated; char valid; u8 config5; u16 alarms; u16 voltage[3][3]; u16 temp[7][3]; u16 tach[2][4]; u8 pwm[4][3]; u8 range[3]; u8 pwmctl[3]; u8 pwmchan[3]; }; static struct i2c_driver adt7475_driver; static struct adt7475_data *adt7475_update_device(struct device *dev); static void adt7475_read_hystersis(struct i2c_client *client); static void adt7475_read_pwm(struct i2c_client *client, int index); /* Given a temp value, convert it to register value */ static inline u16 temp2reg(struct adt7475_data *data, long val) { u16 ret; if (!(data->config5 & CONFIG5_TWOSCOMP)) { val = SENSORS_LIMIT(val, -64000, 191000); ret = (val + 64500) / 1000; } else { val = SENSORS_LIMIT(val, -128000, 127000); if (val < -500) ret = (256500 + val) / 1000; else ret = (val + 500) / 1000; } return ret << 2; } /* Given a register value, convert it to a real temp value */ static inline int reg2temp(struct adt7475_data *data, u16 reg) { if (data->config5 & CONFIG5_TWOSCOMP) { if (reg >= 512) return (reg - 1024) * 250; else return reg * 250; } else return (reg - 256) * 250; } static inline int tach2rpm(u16 tach) { if (tach == 0 || tach == 0xFFFF) return 0; return (90000 * 60) / tach; } static inline u16 rpm2tach(unsigned long rpm) { if (rpm == 0) return 0; return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF); } static inline int reg2vcc(u16 reg) { return (4296 * reg) / 1000; } static inline int reg2vccp(u16 reg) { return (2929 * reg) / 1000; } static inline u16 vcc2reg(long vcc) { vcc = SENSORS_LIMIT(vcc, 0, 4396); return (vcc * 1000) / 4296; } static inline u16 vccp2reg(long vcc) { vcc = SENSORS_LIMIT(vcc, 0, 2998); return (vcc * 1000) / 2929; } static u16 adt7475_read_word(struct i2c_client *client, int reg) { u16 val; val = i2c_smbus_read_byte_data(client, reg); val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8); return val; } static void adt7475_write_word(struct i2c_client *client, int reg, u16 val) { i2c_smbus_write_byte_data(client, reg + 1, val >> 8); i2c_smbus_write_byte_data(client, reg, val & 0xFF); } /* Find the nearest value in a table - used for pwm frequency and auto temp range */ static int find_nearest(long val, const int *array, int size) { int i; if (val < array[0]) return 0; if (val > array[size - 1]) return size - 1; for (i = 0; i < size - 1; i++) { int a, b; if (val > array[i + 1]) continue; a = val - array[i]; b = array[i + 1] - val; return (a <= b) ? i : i + 1; } return 0; } static ssize_t show_voltage(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); unsigned short val; switch (sattr->nr) { case ALARM: return sprintf(buf, "%d\n", (data->alarms >> (sattr->index + 1)) & 1); default: val = data->voltage[sattr->nr][sattr->index]; return sprintf(buf, "%d\n", sattr->index == 0 ? reg2vccp(val) : reg2vcc(val)); } } static ssize_t set_voltage(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); unsigned char reg; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); data->voltage[sattr->nr][sattr->index] = sattr->index ? vcc2reg(val) : vccp2reg(val); if (sattr->nr == MIN) reg = VOLTAGE_MIN_REG(sattr->index); else reg = VOLTAGE_MAX_REG(sattr->index); i2c_smbus_write_byte_data(client, reg, data->voltage[sattr->nr][sattr->index] >> 2); mutex_unlock(&data->lock); return count; } static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); int out; switch (sattr->nr) { case HYSTERSIS: mutex_lock(&data->lock); out = data->temp[sattr->nr][sattr->index]; if (sattr->index != 1) out = (out >> 4) & 0xF; else out = (out & 0xF); /* Show the value as an absolute number tied to * THERM */ out = reg2temp(data, data->temp[THERM][sattr->index]) - out * 1000; mutex_unlock(&data->lock); break; case OFFSET: /* Offset is always 2's complement, regardless of the * setting in CONFIG5 */ mutex_lock(&data->lock); out = (s8)data->temp[sattr->nr][sattr->index]; if (data->config5 & CONFIG5_TEMPOFFSET) out *= 1000; else out *= 500; mutex_unlock(&data->lock); break; case ALARM: out = (data->alarms >> (sattr->index + 4)) & 1; break; case FAULT: /* Note - only for remote1 and remote2 */ out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000)); break; default: /* All other temp values are in the configured format */ out = reg2temp(data, data->temp[sattr->nr][sattr->index]); } return sprintf(buf, "%d\n", out); } static ssize_t set_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); unsigned char reg = 0; u8 out; int temp; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); /* We need the config register in all cases for temp <-> reg conv. */ data->config5 = adt7475_read(REG_CONFIG5); switch (sattr->nr) { case OFFSET: if (data->config5 & CONFIG5_TEMPOFFSET) { val = SENSORS_LIMIT(val, -63000, 127000); out = data->temp[OFFSET][sattr->index] = val / 1000; } else { val = SENSORS_LIMIT(val, -63000, 64000); out = data->temp[OFFSET][sattr->index] = val / 500; } break; case HYSTERSIS: /* The value will be given as an absolute value, turn it into an offset based on THERM */ /* Read fresh THERM and HYSTERSIS values from the chip */ data->temp[THERM][sattr->index] = adt7475_read(TEMP_THERM_REG(sattr->index)) << 2; adt7475_read_hystersis(client); temp = reg2temp(data, data->temp[THERM][sattr->index]); val = SENSORS_LIMIT(val, temp - 15000, temp); val = (temp - val) / 1000; if (sattr->index != 1) { data->temp[HYSTERSIS][sattr->index] &= 0xF0; data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4; } else { data->temp[HYSTERSIS][sattr->index] &= 0x0F; data->temp[HYSTERSIS][sattr->index] |= (val & 0xF); } out = data->temp[HYSTERSIS][sattr->index]; break; default: data->temp[sattr->nr][sattr->index] = temp2reg(data, val); /* We maintain an extra 2 digits of precision for simplicity * - shift those back off before writing the value */ out = (u8) (data->temp[sattr->nr][sattr->index] >> 2); } switch (sattr->nr) { case MIN: reg = TEMP_MIN_REG(sattr->index); break; case MAX: reg = TEMP_MAX_REG(sattr->index); break; case OFFSET: reg = TEMP_OFFSET_REG(sattr->index); break; case AUTOMIN: reg = TEMP_TMIN_REG(sattr->index); break; case THERM: reg = TEMP_THERM_REG(sattr->index); break; case HYSTERSIS: if (sattr->index != 2) reg = REG_REMOTE1_HYSTERSIS; else reg = REG_REMOTE2_HYSTERSIS; break; } i2c_smbus_write_byte_data(client, reg, out); mutex_unlock(&data->lock); return count; } /* Table of autorange values - the user will write the value in millidegrees, and we'll convert it */ static const int autorange_table[] = { 2000, 2500, 3330, 4000, 5000, 6670, 8000, 10000, 13330, 16000, 20000, 26670, 32000, 40000, 53330, 80000 }; static ssize_t show_point2(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); int out, val; mutex_lock(&data->lock); out = (data->range[sattr->index] >> 4) & 0x0F; val = reg2temp(data, data->temp[AUTOMIN][sattr->index]); mutex_unlock(&data->lock); return sprintf(buf, "%d\n", val + autorange_table[out]); } static ssize_t set_point2(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); int temp; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); /* Get a fresh copy of the needed registers */ data->config5 = adt7475_read(REG_CONFIG5); data->temp[AUTOMIN][sattr->index] = adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2; data->range[sattr->index] = adt7475_read(TEMP_TRANGE_REG(sattr->index)); /* The user will write an absolute value, so subtract the start point to figure the range */ temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]); val = SENSORS_LIMIT(val, temp + autorange_table[0], temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]); val -= temp; /* Find the nearest table entry to what the user wrote */ val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table)); data->range[sattr->index] &= ~0xF0; data->range[sattr->index] |= val << 4; i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index), data->range[sattr->index]); mutex_unlock(&data->lock); return count; } static ssize_t show_tach(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); int out; if (sattr->nr == ALARM) out = (data->alarms >> (sattr->index + 10)) & 1; else out = tach2rpm(data->tach[sattr->nr][sattr->index]); return sprintf(buf, "%d\n", out); } static ssize_t set_tach(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); unsigned long val; if (strict_strtoul(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); data->tach[MIN][sattr->index] = rpm2tach(val); adt7475_write_word(client, TACH_MIN_REG(sattr->index), data->tach[MIN][sattr->index]); mutex_unlock(&data->lock); return count; } static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]); } static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); return sprintf(buf, "%d\n", data->pwmchan[sattr->index]); } static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); return sprintf(buf, "%d\n", data->pwmctl[sattr->index]); } static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); unsigned char reg = 0; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); switch (sattr->nr) { case INPUT: /* Get a fresh value for CONTROL */ data->pwm[CONTROL][sattr->index] = adt7475_read(PWM_CONFIG_REG(sattr->index)); /* If we are not in manual mode, then we shouldn't allow * the user to set the pwm speed */ if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) { mutex_unlock(&data->lock); return count; } reg = PWM_REG(sattr->index); break; case MIN: reg = PWM_MIN_REG(sattr->index); break; case MAX: reg = PWM_MAX_REG(sattr->index); break; } data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF); i2c_smbus_write_byte_data(client, reg, data->pwm[sattr->nr][sattr->index]); mutex_unlock(&data->lock); return count; } /* Called by set_pwmctrl and set_pwmchan */ static int hw_set_pwm(struct i2c_client *client, int index, unsigned int pwmctl, unsigned int pwmchan) { struct adt7475_data *data = i2c_get_clientdata(client); long val = 0; switch (pwmctl) { case 0: val = 0x03; /* Run at full speed */ break; case 1: val = 0x07; /* Manual mode */ break; case 2: switch (pwmchan) { case 1: /* Remote1 controls PWM */ val = 0x00; break; case 2: /* local controls PWM */ val = 0x01; break; case 4: /* remote2 controls PWM */ val = 0x02; break; case 6: /* local/remote2 control PWM */ val = 0x05; break; case 7: /* All three control PWM */ val = 0x06; break; default: return -EINVAL; } break; default: return -EINVAL; } data->pwmctl[index] = pwmctl; data->pwmchan[index] = pwmchan; data->pwm[CONTROL][index] &= ~0xE0; data->pwm[CONTROL][index] |= (val & 7) << 5; i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), data->pwm[CONTROL][index]); return 0; } static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); int r; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); /* Read Modify Write PWM values */ adt7475_read_pwm(client, sattr->index); r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val); if (r) count = r; mutex_unlock(&data->lock); return count; } static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); int r; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; mutex_lock(&data->lock); /* Read Modify Write PWM values */ adt7475_read_pwm(client, sattr->index); r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]); if (r) count = r; mutex_unlock(&data->lock); return count; } /* List of frequencies for the PWM */ static const int pwmfreq_table[] = { 11, 14, 22, 29, 35, 44, 58, 88 }; static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr, char *buf) { struct adt7475_data *data = adt7475_update_device(dev); struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); return sprintf(buf, "%d\n", pwmfreq_table[data->range[sattr->index] & 7]); } static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); int out; long val; if (strict_strtol(buf, 10, &val)) return -EINVAL; out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table)); mutex_lock(&data->lock); data->range[sattr->index] = adt7475_read(TEMP_TRANGE_REG(sattr->index)); data->range[sattr->index] &= ~7; data->range[sattr->index] |= out; i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index), data->range[sattr->index]); mutex_unlock(&data->lock); return count; } static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 0); static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage, set_voltage, MAX, 0); static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage, set_voltage, MIN, 0); static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0); static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 1); static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage, set_voltage, MAX, 1); static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage, set_voltage, MIN, 1); static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1); static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0); static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0); static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0); static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp, MAX, 0); static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp, MIN, 0); static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp, set_temp, OFFSET, 0); static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR, show_temp, set_temp, AUTOMIN, 0); static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR, show_point2, set_point2, 0, 0); static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 0); static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 0); static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1); static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1); static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp, MAX, 1); static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp, MIN, 1); static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp, set_temp, OFFSET, 1); static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR, show_temp, set_temp, AUTOMIN, 1); static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR, show_point2, set_point2, 0, 1); static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 1); static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 1); static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2); static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2); static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2); static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp, MAX, 2); static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp, MIN, 2); static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp, set_temp, OFFSET, 2); static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR, show_temp, set_temp, AUTOMIN, 2); static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR, show_point2, set_point2, 0, 2); static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 2); static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 2); static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0); static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach, MIN, 0); static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0); static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1); static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach, MIN, 1); static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1); static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2); static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach, MIN, 2); static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2); static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3); static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach, MIN, 3); static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3); static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT, 0); static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq, set_pwmfreq, INPUT, 0); static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl, set_pwmctrl, INPUT, 0); static SENSOR_DEVICE_ATTR_2(pwm1_auto_channel_temp, S_IRUGO | S_IWUSR, show_pwmchan, set_pwmchan, INPUT, 0); static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MIN, 0); static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MAX, 0); static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT, 1); static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq, set_pwmfreq, INPUT, 1); static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl, set_pwmctrl, INPUT, 1); static SENSOR_DEVICE_ATTR_2(pwm2_auto_channel_temp, S_IRUGO | S_IWUSR, show_pwmchan, set_pwmchan, INPUT, 1); static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MIN, 1); static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MAX, 1); static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT, 2); static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq, set_pwmfreq, INPUT, 2); static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl, set_pwmctrl, INPUT, 2); static SENSOR_DEVICE_ATTR_2(pwm3_auto_channel_temp, S_IRUGO | S_IWUSR, show_pwmchan, set_pwmchan, INPUT, 2); static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MIN, 2); static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MAX, 2); static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp1_fault.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_offset.dev_attr.attr, &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp2_offset.dev_attr.attr, &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp3_offset.dev_attr.attr, &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, &sensor_dev_attr_fan1_input.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_min.dev_attr.attr, &sensor_dev_attr_fan2_alarm.dev_attr.attr, &sensor_dev_attr_fan3_input.dev_attr.attr, &sensor_dev_attr_fan3_min.dev_attr.attr, &sensor_dev_attr_fan3_alarm.dev_attr.attr, &sensor_dev_attr_fan4_input.dev_attr.attr, &sensor_dev_attr_fan4_min.dev_attr.attr, &sensor_dev_attr_fan4_alarm.dev_attr.attr, &sensor_dev_attr_pwm1.dev_attr.attr, &sensor_dev_attr_pwm1_freq.dev_attr.attr, &sensor_dev_attr_pwm1_enable.dev_attr.attr, &sensor_dev_attr_pwm1_auto_channel_temp.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm2.dev_attr.attr, &sensor_dev_attr_pwm2_freq.dev_attr.attr, &sensor_dev_attr_pwm2_enable.dev_attr.attr, &sensor_dev_attr_pwm2_auto_channel_temp.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm3.dev_attr.attr, &sensor_dev_attr_pwm3_freq.dev_attr.attr, &sensor_dev_attr_pwm3_enable.dev_attr.attr, &sensor_dev_attr_pwm3_auto_channel_temp.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, NULL, }; struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs }; static int adt7475_detect(struct i2c_client *client, int kind, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; if (kind <= 0) { if (adt7475_read(REG_VENDID) != 0x41 || adt7475_read(REG_DEVID) != 0x75) { dev_err(&adapter->dev, "Couldn't detect a adt7475 part at 0x%02x\n", (unsigned int)client->addr); return -ENODEV; } } strlcpy(info->type, adt7475_id[0].name, I2C_NAME_SIZE); return 0; } static int adt7475_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct adt7475_data *data; int i, ret = 0; data = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; mutex_init(&data->lock); i2c_set_clientdata(client, data); /* Call adt7475_read_pwm for all pwm's as this will reprogram any pwm's which are disabled to manual mode with 0% duty cycle */ for (i = 0; i < ADT7475_PWM_COUNT; i++) adt7475_read_pwm(client, i); ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group); if (ret) goto efree; data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { ret = PTR_ERR(data->hwmon_dev); goto eremove; } return 0; eremove: sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group); efree: kfree(data); return ret; } static int adt7475_remove(struct i2c_client *client) { struct adt7475_data *data = i2c_get_clientdata(client); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group); kfree(data); return 0; } static struct i2c_driver adt7475_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "adt7475", }, .probe = adt7475_probe, .remove = adt7475_remove, .id_table = adt7475_id, .detect = adt7475_detect, .address_data = &addr_data, }; static void adt7475_read_hystersis(struct i2c_client *client) { struct adt7475_data *data = i2c_get_clientdata(client); data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS); data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0]; data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS); } static void adt7475_read_pwm(struct i2c_client *client, int index) { struct adt7475_data *data = i2c_get_clientdata(client); unsigned int v; data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index)); /* Figure out the internal value for pwmctrl and pwmchan based on the current settings */ v = (data->pwm[CONTROL][index] >> 5) & 7; if (v == 3) data->pwmctl[index] = 0; else if (v == 7) data->pwmctl[index] = 1; else if (v == 4) { /* The fan is disabled - we don't want to support that, so change to manual mode and set the duty cycle to 0 instead */ data->pwm[INPUT][index] = 0; data->pwm[CONTROL][index] &= ~0xE0; data->pwm[CONTROL][index] |= (7 << 5); i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), data->pwm[INPUT][index]); i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), data->pwm[CONTROL][index]); data->pwmctl[index] = 1; } else { data->pwmctl[index] = 2; switch (v) { case 0: data->pwmchan[index] = 1; break; case 1: data->pwmchan[index] = 2; break; case 2: data->pwmchan[index] = 4; break; case 5: data->pwmchan[index] = 6; break; case 6: data->pwmchan[index] = 7; break; } } } static struct adt7475_data *adt7475_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct adt7475_data *data = i2c_get_clientdata(client); u8 ext; int i; mutex_lock(&data->lock); /* Measurement values update every 2 seconds */ if (time_after(jiffies, data->measure_updated + HZ * 2) || !data->valid) { data->alarms = adt7475_read(REG_STATUS2) << 8; data->alarms |= adt7475_read(REG_STATUS1); ext = adt7475_read(REG_EXTEND1); for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) data->voltage[INPUT][i] = (adt7475_read(VOLTAGE_REG(i)) << 2) | ((ext >> ((i + 1) * 2)) & 3); ext = adt7475_read(REG_EXTEND2); for (i = 0; i < ADT7475_TEMP_COUNT; i++) data->temp[INPUT][i] = (adt7475_read(TEMP_REG(i)) << 2) | ((ext >> ((i + 1) * 2)) & 3); for (i = 0; i < ADT7475_TACH_COUNT; i++) data->tach[INPUT][i] = adt7475_read_word(client, TACH_REG(i)); /* Updated by hw when in auto mode */ for (i = 0; i < ADT7475_PWM_COUNT; i++) data->pwm[INPUT][i] = adt7475_read(PWM_REG(i)); data->measure_updated = jiffies; } /* Limits and settings, should never change update every 60 seconds */ if (time_after(jiffies, data->limits_updated + HZ * 2) || !data->valid) { data->config5 = adt7475_read(REG_CONFIG5); for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) { /* Adjust values so they match the input precision */ data->voltage[MIN][i] = adt7475_read(VOLTAGE_MIN_REG(i)) << 2; data->voltage[MAX][i] = adt7475_read(VOLTAGE_MAX_REG(i)) << 2; } for (i = 0; i < ADT7475_TEMP_COUNT; i++) { /* Adjust values so they match the input precision */ data->temp[MIN][i] = adt7475_read(TEMP_MIN_REG(i)) << 2; data->temp[MAX][i] = adt7475_read(TEMP_MAX_REG(i)) << 2; data->temp[AUTOMIN][i] = adt7475_read(TEMP_TMIN_REG(i)) << 2; data->temp[THERM][i] = adt7475_read(TEMP_THERM_REG(i)) << 2; data->temp[OFFSET][i] = adt7475_read(TEMP_OFFSET_REG(i)); } adt7475_read_hystersis(client); for (i = 0; i < ADT7475_TACH_COUNT; i++) data->tach[MIN][i] = adt7475_read_word(client, TACH_MIN_REG(i)); for (i = 0; i < ADT7475_PWM_COUNT; i++) { data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i)); data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i)); /* Set the channel and control information */ adt7475_read_pwm(client, i); } data->range[0] = adt7475_read(TEMP_TRANGE_REG(0)); data->range[1] = adt7475_read(TEMP_TRANGE_REG(1)); data->range[2] = adt7475_read(TEMP_TRANGE_REG(2)); data->limits_updated = jiffies; data->valid = 1; } mutex_unlock(&data->lock); return data; } static int __init sensors_adt7475_init(void) { return i2c_add_driver(&adt7475_driver); } static void __exit sensors_adt7475_exit(void) { i2c_del_driver(&adt7475_driver); } MODULE_AUTHOR("Advanced Micro Devices, Inc"); MODULE_DESCRIPTION("adt7475 driver"); MODULE_LICENSE("GPL"); module_init(sensors_adt7475_init); module_exit(sensors_adt7475_exit);