// SPDX-License-Identifier: GPL-2.0-or-later /* * Maxim MAX31785 PMBus 6-Channel Fan Controller * * Datasheet: * https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf * * Copyright(c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. */ #include "qemu/osdep.h" #include "hw/i2c/pmbus_device.h" #include "hw/irq.h" #include "migration/vmstate.h" #include "qapi/error.h" #include "qapi/visitor.h" #include "qemu/log.h" #include "qemu/module.h" #define TYPE_MAX31785 "max31785" #define MAX31785(obj) OBJECT_CHECK(MAX31785State, (obj), TYPE_MAX31785) /* MAX31785 mfr specific PMBus commands */ #define MAX31785_MFR_MODE 0xD1 #define MAX31785_MFR_PSEN_CONFIG 0xD2 #define MAX31785_MFR_VOUT_PEAK 0xD4 #define MAX31785_MFR_TEMPERATURE_PEAK 0xD6 #define MAX31785_MFR_VOUT_MIN 0xD7 #define MAX31785_MFR_FAULT_RESPONSE 0xD9 #define MAX31785_MFR_NV_FAULT_LOG 0xDC #define MAX31785_MFR_TIME_COUNT 0xDD #define MAX31785_MFR_TEMP_SENSOR_CONFIG 0xF0 #define MAX31785_MFR_FAN_CONFIG 0xF1 #define MAX31785_MFR_FAN_LUT 0xF2 #define MAX31785_MFR_READ_FAN_PWM 0xF3 #define MAX31785_MFR_FAN_FAULT_LIMIT 0xF5 #define MAX31785_MFR_FAN_WARN_LIMIT 0xF6 #define MAX31785_MFR_FAN_RUN_TIME 0xF7 #define MAX31785_MFR_FAN_PWM_AVG 0xF8 #define MAX31785_MFR_FAN_PWM2RPM 0xF9 /* defaults as per the data sheet */ #define MAX31785_DEFAULT_CAPABILITY 0x10 #define MAX31785_DEFAULT_VOUT_MODE 0x40 #define MAX31785_DEFAULT_VOUT_SCALE_MONITOR 0x7FFF #define MAX31785_DEFAULT_FAN_COMMAND_1 0x7FFF #define MAX31785_DEFAULT_OV_FAULT_LIMIT 0x7FFF #define MAX31785_DEFAULT_OV_WARN_LIMIT 0x7FFF #define MAX31785_DEFAULT_OT_FAULT_LIMIT 0x7FFF #define MAX31785_DEFAULT_OT_WARN_LIMIT 0x7FFF #define MAX31785_DEFAULT_PMBUS_REVISION 0x11 #define MAX31785_DEFAULT_MFR_ID 0x4D #define MAX31785_DEFAULT_MFR_MODEL 0x53 #define MAX31785_DEFAULT_MFR_REVISION 0x3030 #define MAX31785A_DEFAULT_MFR_REVISION 0x3040 #define MAX31785B_DEFAULT_MFR_REVISION 0x3061 #define MAX31785B_DEFAULT_MFR_TEMPERATURE_PEAK 0x8000 #define MAX31785B_DEFAULT_MFR_VOUT_MIN 0x7FFF #define MAX31785_DEFAULT_TEXT 0x3130313031303130 /* MAX31785 pages */ #define MAX31785_TOTAL_NUM_PAGES 23 #define MAX31785_FAN_PAGES 6 #define MAX31785_MIN_FAN_PAGE 0 #define MAX31785_MAX_FAN_PAGE 5 #define MAX31785_MIN_TEMP_PAGE 6 #define MAX31785_MAX_TEMP_PAGE 16 #define MAX31785_MIN_ADC_VOLTAGE_PAGE 17 #define MAX31785_MAX_ADC_VOLTAGE_PAGE 22 /* FAN_CONFIG_1_2 */ #define MAX31785_MFR_FAN_CONFIG 0xF1 #define MAX31785_FAN_CONFIG_ENABLE BIT(7) #define MAX31785_FAN_CONFIG_RPM_PWM BIT(6) #define MAX31785_FAN_CONFIG_PULSE(pulse) (pulse << 4) #define MAX31785_DEFAULT_FAN_CONFIG_1_2(pulse) \ (MAX31785_FAN_CONFIG_ENABLE | MAX31785_FAN_CONFIG_PULSE(pulse)) #define MAX31785_DEFAULT_MFR_FAN_CONFIG 0x0000 /* fan speed in RPM */ #define MAX31785_DEFAULT_FAN_SPEED 0x7fff #define MAX31785_DEFAULT_FAN_STATUS 0x00 #define MAX31785_DEFAULT_FAN_MAX_PWM 0x2710 /* * MAX31785State: * @code: The command code received * @page: Each page corresponds to a device monitored by the Max 31785 * The page register determines the available commands depending on device * _____________________________________________________________________________ * | 0 | Fan Connected to PWM0 | * |_______|___________________________________________________________________| * | 1 | Fan Connected to PWM1 | * |_______|___________________________________________________________________| * | 2 | Fan Connected to PWM2 | * |_______|___________________________________________________________________| * | 3 | Fan Connected to PWM3 | * |_______|___________________________________________________________________| * | 4 | Fan Connected to PWM4 | * |_______|___________________________________________________________________| * | 5 | Fan Connected to PWM5 | * |_______|___________________________________________________________________| * | 6 | Remote Thermal Diode Connected to ADC 0 | * |_______|___________________________________________________________________| * | 7 | Remote Thermal Diode Connected to ADC 1 | * |_______|___________________________________________________________________| * | 8 | Remote Thermal Diode Connected to ADC 2 | * |_______|___________________________________________________________________| * | 9 | Remote Thermal Diode Connected to ADC 3 | * |_______|___________________________________________________________________| * | 10 | Remote Thermal Diode Connected to ADC 4 | * |_______|___________________________________________________________________| * | 11 | Remote Thermal Diode Connected to ADC 5 | * |_______|___________________________________________________________________| * | 12 | Internal Temperature Sensor | * |_______|___________________________________________________________________| * | 13 | Remote I2C Temperature Sensor with Address 0 | * |_______|___________________________________________________________________| * | 14 | Remote I2C Temperature Sensor with Address 1 | * |_______|___________________________________________________________________| * | 15 | Remote I2C Temperature Sensor with Address 2 | * |_______|___________________________________________________________________| * | 16 | Remote I2C Temperature Sensor with Address 3 | * |_______|___________________________________________________________________| * | 17 | Remote I2C Temperature Sensor with Address 4 | * |_______|___________________________________________________________________| * | 17 | Remote Voltage Connected to ADC0 | * |_______|___________________________________________________________________| * | 18 | Remote Voltage Connected to ADC1 | * |_______|___________________________________________________________________| * | 19 | Remote Voltage Connected to ADC2 | * |_______|___________________________________________________________________| * | 20 | Remote Voltage Connected to ADC3 | * |_______|___________________________________________________________________| * | 21 | Remote Voltage Connected to ADC4 | * |_______|___________________________________________________________________| * | 22 | Remote Voltage Connected to ADC5 | * |_______|___________________________________________________________________| * |23-254 | Reserved | * |_______|___________________________________________________________________| * | 255 | Applies to all pages | * |_______|___________________________________________________________________| */ /* Place holder to save the max31785 mfr specific registers */ typedef struct MAX31785State { PMBusDevice parent; uint16_t mfr_mode[MAX31785_TOTAL_NUM_PAGES]; uint16_t vout_peak[MAX31785_TOTAL_NUM_PAGES]; uint16_t temperature_peak[MAX31785_TOTAL_NUM_PAGES]; uint16_t vout_min[MAX31785_TOTAL_NUM_PAGES]; uint8_t fault_response[MAX31785_TOTAL_NUM_PAGES]; uint32_t time_count[MAX31785_TOTAL_NUM_PAGES]; uint16_t temp_sensor_config[MAX31785_TOTAL_NUM_PAGES]; uint16_t fan_config[MAX31785_TOTAL_NUM_PAGES]; uint16_t read_fan_pwm[MAX31785_TOTAL_NUM_PAGES]; uint16_t fan_fault_limit[MAX31785_TOTAL_NUM_PAGES]; uint16_t fan_warn_limit[MAX31785_TOTAL_NUM_PAGES]; uint16_t fan_run_time[MAX31785_TOTAL_NUM_PAGES]; uint16_t fan_pwm_avg[MAX31785_TOTAL_NUM_PAGES]; uint64_t fan_pwm2rpm[MAX31785_TOTAL_NUM_PAGES]; uint64_t mfr_location; uint64_t mfr_date; uint64_t mfr_serial; uint16_t mfr_revision; } MAX31785State; static uint8_t max31785_read_byte(PMBusDevice *pmdev) { MAX31785State *s = MAX31785(pmdev); switch (pmdev->code) { case PMBUS_FAN_CONFIG_1_2: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send8(pmdev, pmdev->pages[pmdev->page].fan_config_1_2); } break; case PMBUS_FAN_COMMAND_1: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, pmdev->pages[pmdev->page].fan_command_1); } break; case PMBUS_READ_FAN_SPEED_1: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, pmdev->pages[pmdev->page].read_fan_speed_1); } break; case PMBUS_STATUS_FANS_1_2: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, pmdev->pages[pmdev->page].status_fans_1_2); } break; case PMBUS_MFR_REVISION: pmbus_send16(pmdev, MAX31785_DEFAULT_MFR_REVISION); break; case PMBUS_MFR_ID: pmbus_send8(pmdev, 0x4d); /* Maxim */ break; case PMBUS_MFR_MODEL: pmbus_send8(pmdev, 0x53); break; case PMBUS_MFR_LOCATION: pmbus_send64(pmdev, s->mfr_location); break; case PMBUS_MFR_DATE: pmbus_send64(pmdev, s->mfr_date); break; case PMBUS_MFR_SERIAL: pmbus_send64(pmdev, s->mfr_serial); break; case MAX31785_MFR_MODE: pmbus_send16(pmdev, s->mfr_mode[pmdev->page]); break; case MAX31785_MFR_VOUT_PEAK: if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) && (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) { pmbus_send16(pmdev, s->vout_peak[pmdev->page]); } break; case MAX31785_MFR_TEMPERATURE_PEAK: if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) && (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) { pmbus_send16(pmdev, s->temperature_peak[pmdev->page]); } break; case MAX31785_MFR_VOUT_MIN: if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) && (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) { pmbus_send16(pmdev, s->vout_min[pmdev->page]); } break; case MAX31785_MFR_FAULT_RESPONSE: pmbus_send8(pmdev, s->fault_response[pmdev->page]); break; case MAX31785_MFR_TIME_COUNT: /* R/W 32 */ pmbus_send32(pmdev, s->time_count[pmdev->page]); break; case MAX31785_MFR_TEMP_SENSOR_CONFIG: /* R/W 16 */ if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) && (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) { pmbus_send16(pmdev, s->temp_sensor_config[pmdev->page]); } break; case MAX31785_MFR_FAN_CONFIG: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->fan_config[pmdev->page]); } break; case MAX31785_MFR_READ_FAN_PWM: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->read_fan_pwm[pmdev->page]); } break; case MAX31785_MFR_FAN_FAULT_LIMIT: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->fan_fault_limit[pmdev->page]); } break; case MAX31785_MFR_FAN_WARN_LIMIT: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->fan_warn_limit[pmdev->page]); } break; case MAX31785_MFR_FAN_RUN_TIME: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->fan_run_time[pmdev->page]); } break; case MAX31785_MFR_FAN_PWM_AVG: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send16(pmdev, s->fan_pwm_avg[pmdev->page]); } break; case MAX31785_MFR_FAN_PWM2RPM: /* R/W 64 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmbus_send64(pmdev, s->fan_pwm2rpm[pmdev->page]); } break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: reading from unsupported register: 0x%02x\n", __func__, pmdev->code); break; } return 0xFF; } static int max31785_write_data(PMBusDevice *pmdev, const uint8_t *buf, uint8_t len) { MAX31785State *s = MAX31785(pmdev); if (len == 0) { qemu_log_mask(LOG_GUEST_ERROR, "%s: writing empty data\n", __func__); return -1; } pmdev->code = buf[0]; /* PMBus command code */ if (len == 1) { return 0; } /* Exclude command code from buffer */ buf++; len--; switch (pmdev->code) { case PMBUS_FAN_CONFIG_1_2: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmdev->pages[pmdev->page].fan_config_1_2 = pmbus_receive8(pmdev); } break; case PMBUS_FAN_COMMAND_1: if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { pmdev->pages[pmdev->page].fan_command_1 = pmbus_receive16(pmdev); pmdev->pages[pmdev->page].read_fan_speed_1 = ((MAX31785_DEFAULT_FAN_SPEED / MAX31785_DEFAULT_FAN_MAX_PWM) * pmdev->pages[pmdev->page].fan_command_1); } break; case PMBUS_MFR_LOCATION: /* R/W 64 */ s->mfr_location = pmbus_receive64(pmdev); break; case PMBUS_MFR_DATE: /* R/W 64 */ s->mfr_date = pmbus_receive64(pmdev); break; case PMBUS_MFR_SERIAL: /* R/W 64 */ s->mfr_serial = pmbus_receive64(pmdev); break; case MAX31785_MFR_MODE: /* R/W word */ s->mfr_mode[pmdev->page] = pmbus_receive16(pmdev); break; case MAX31785_MFR_VOUT_PEAK: /* R/W word */ if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) && (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) { s->vout_peak[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_TEMPERATURE_PEAK: /* R/W word */ if ((pmdev->page >= 6) && (pmdev->page <= 16)) { s->temperature_peak[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_VOUT_MIN: /* R/W word */ if ((pmdev->page >= MAX31785_MIN_ADC_VOLTAGE_PAGE) && (pmdev->page <= MAX31785_MAX_ADC_VOLTAGE_PAGE)) { s->vout_min[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAULT_RESPONSE: /* R/W 8 */ s->fault_response[pmdev->page] = pmbus_receive8(pmdev); break; case MAX31785_MFR_TIME_COUNT: /* R/W 32 */ s->time_count[pmdev->page] = pmbus_receive32(pmdev); break; case MAX31785_MFR_TEMP_SENSOR_CONFIG: /* R/W 16 */ if ((pmdev->page >= MAX31785_MIN_TEMP_PAGE) && (pmdev->page <= MAX31785_MAX_TEMP_PAGE)) { s->temp_sensor_config[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_CONFIG: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_config[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_FAULT_LIMIT: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_fault_limit[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_WARN_LIMIT: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_warn_limit[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_RUN_TIME: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_run_time[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_PWM_AVG: /* R/W 16 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_pwm_avg[pmdev->page] = pmbus_receive16(pmdev); } break; case MAX31785_MFR_FAN_PWM2RPM: /* R/W 64 */ if (pmdev->page <= MAX31785_MAX_FAN_PAGE) { s->fan_pwm2rpm[pmdev->page] = pmbus_receive64(pmdev); } break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: writing to unsupported register: 0x%02x\n", __func__, pmdev->code); break; } return 0; } static void max31785_exit_reset(Object *obj) { PMBusDevice *pmdev = PMBUS_DEVICE(obj); MAX31785State *s = MAX31785(obj); pmdev->capability = MAX31785_DEFAULT_CAPABILITY; for (int i = MAX31785_MIN_FAN_PAGE; i <= MAX31785_MAX_FAN_PAGE; i++) { pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE; pmdev->pages[i].fan_command_1 = MAX31785_DEFAULT_FAN_COMMAND_1; pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION; pmdev->pages[i].fan_config_1_2 = MAX31785_DEFAULT_FAN_CONFIG_1_2(0); pmdev->pages[i].read_fan_speed_1 = MAX31785_DEFAULT_FAN_SPEED; pmdev->pages[i].status_fans_1_2 = MAX31785_DEFAULT_FAN_STATUS; } for (int i = MAX31785_MIN_TEMP_PAGE; i <= MAX31785_MAX_TEMP_PAGE; i++) { pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE; pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION; pmdev->pages[i].ot_fault_limit = MAX31785_DEFAULT_OT_FAULT_LIMIT; pmdev->pages[i].ot_warn_limit = MAX31785_DEFAULT_OT_WARN_LIMIT; } for (int i = MAX31785_MIN_ADC_VOLTAGE_PAGE; i <= MAX31785_MAX_ADC_VOLTAGE_PAGE; i++) { pmdev->pages[i].vout_mode = MAX31785_DEFAULT_VOUT_MODE; pmdev->pages[i].revision = MAX31785_DEFAULT_PMBUS_REVISION; pmdev->pages[i].vout_scale_monitor = MAX31785_DEFAULT_VOUT_SCALE_MONITOR; pmdev->pages[i].vout_ov_fault_limit = MAX31785_DEFAULT_OV_FAULT_LIMIT; pmdev->pages[i].vout_ov_warn_limit = MAX31785_DEFAULT_OV_WARN_LIMIT; } s->mfr_location = MAX31785_DEFAULT_TEXT; s->mfr_date = MAX31785_DEFAULT_TEXT; s->mfr_serial = MAX31785_DEFAULT_TEXT; } static const VMStateDescription vmstate_max31785 = { .name = TYPE_MAX31785, .version_id = 0, .minimum_version_id = 0, .fields = (const VMStateField[]){ VMSTATE_PMBUS_DEVICE(parent, MAX31785State), VMSTATE_UINT16_ARRAY(mfr_mode, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(vout_peak, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(temperature_peak, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(vout_min, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT8_ARRAY(fault_response, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT32_ARRAY(time_count, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(temp_sensor_config, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(fan_config, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(read_fan_pwm, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(fan_fault_limit, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(fan_warn_limit, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(fan_run_time, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT16_ARRAY(fan_pwm_avg, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT64_ARRAY(fan_pwm2rpm, MAX31785State, MAX31785_TOTAL_NUM_PAGES), VMSTATE_UINT64(mfr_location, MAX31785State), VMSTATE_UINT64(mfr_date, MAX31785State), VMSTATE_UINT64(mfr_serial, MAX31785State), VMSTATE_END_OF_LIST() } }; static void max31785_init(Object *obj) { PMBusDevice *pmdev = PMBUS_DEVICE(obj); for (int i = MAX31785_MIN_FAN_PAGE; i <= MAX31785_MAX_FAN_PAGE; i++) { pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE); } for (int i = MAX31785_MIN_TEMP_PAGE; i <= MAX31785_MAX_TEMP_PAGE; i++) { pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE | PB_HAS_TEMPERATURE); } for (int i = MAX31785_MIN_ADC_VOLTAGE_PAGE; i <= MAX31785_MAX_ADC_VOLTAGE_PAGE; i++) { pmbus_page_config(pmdev, i, PB_HAS_VOUT_MODE | PB_HAS_VOUT | PB_HAS_VOUT_RATING); } } static void max31785_class_init(ObjectClass *klass, void *data) { ResettableClass *rc = RESETTABLE_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass); PMBusDeviceClass *k = PMBUS_DEVICE_CLASS(klass); dc->desc = "Maxim MAX31785 6-Channel Fan Controller"; dc->vmsd = &vmstate_max31785; k->write_data = max31785_write_data; k->receive_byte = max31785_read_byte; k->device_num_pages = MAX31785_TOTAL_NUM_PAGES; rc->phases.exit = max31785_exit_reset; } static const TypeInfo max31785_info = { .name = TYPE_MAX31785, .parent = TYPE_PMBUS_DEVICE, .instance_size = sizeof(MAX31785State), .instance_init = max31785_init, .class_init = max31785_class_init, }; static void max31785_register_types(void) { type_register_static(&max31785_info); } type_init(max31785_register_types)