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503 lines
15 KiB
503 lines
15 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* pmbus.h - Common defines and structures for PMBus devices |
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* |
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* Copyright (c) 2010, 2011 Ericsson AB. |
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* Copyright (c) 2012 Guenter Roeck |
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*/ |
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#ifndef PMBUS_H |
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#define PMBUS_H |
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#include <linux/bitops.h> |
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#include <linux/regulator/driver.h> |
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/* |
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* Registers |
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*/ |
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enum pmbus_regs { |
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PMBUS_PAGE = 0x00, |
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PMBUS_OPERATION = 0x01, |
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PMBUS_ON_OFF_CONFIG = 0x02, |
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PMBUS_CLEAR_FAULTS = 0x03, |
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PMBUS_PHASE = 0x04, |
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PMBUS_WRITE_PROTECT = 0x10, |
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PMBUS_CAPABILITY = 0x19, |
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PMBUS_QUERY = 0x1A, |
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PMBUS_VOUT_MODE = 0x20, |
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PMBUS_VOUT_COMMAND = 0x21, |
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PMBUS_VOUT_TRIM = 0x22, |
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PMBUS_VOUT_CAL_OFFSET = 0x23, |
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PMBUS_VOUT_MAX = 0x24, |
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PMBUS_VOUT_MARGIN_HIGH = 0x25, |
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PMBUS_VOUT_MARGIN_LOW = 0x26, |
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PMBUS_VOUT_TRANSITION_RATE = 0x27, |
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PMBUS_VOUT_DROOP = 0x28, |
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PMBUS_VOUT_SCALE_LOOP = 0x29, |
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PMBUS_VOUT_SCALE_MONITOR = 0x2A, |
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PMBUS_COEFFICIENTS = 0x30, |
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PMBUS_POUT_MAX = 0x31, |
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PMBUS_FAN_CONFIG_12 = 0x3A, |
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PMBUS_FAN_COMMAND_1 = 0x3B, |
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PMBUS_FAN_COMMAND_2 = 0x3C, |
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PMBUS_FAN_CONFIG_34 = 0x3D, |
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PMBUS_FAN_COMMAND_3 = 0x3E, |
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PMBUS_FAN_COMMAND_4 = 0x3F, |
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PMBUS_VOUT_OV_FAULT_LIMIT = 0x40, |
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PMBUS_VOUT_OV_FAULT_RESPONSE = 0x41, |
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PMBUS_VOUT_OV_WARN_LIMIT = 0x42, |
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PMBUS_VOUT_UV_WARN_LIMIT = 0x43, |
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PMBUS_VOUT_UV_FAULT_LIMIT = 0x44, |
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PMBUS_VOUT_UV_FAULT_RESPONSE = 0x45, |
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PMBUS_IOUT_OC_FAULT_LIMIT = 0x46, |
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PMBUS_IOUT_OC_FAULT_RESPONSE = 0x47, |
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PMBUS_IOUT_OC_LV_FAULT_LIMIT = 0x48, |
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PMBUS_IOUT_OC_LV_FAULT_RESPONSE = 0x49, |
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PMBUS_IOUT_OC_WARN_LIMIT = 0x4A, |
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PMBUS_IOUT_UC_FAULT_LIMIT = 0x4B, |
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PMBUS_IOUT_UC_FAULT_RESPONSE = 0x4C, |
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PMBUS_OT_FAULT_LIMIT = 0x4F, |
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PMBUS_OT_FAULT_RESPONSE = 0x50, |
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PMBUS_OT_WARN_LIMIT = 0x51, |
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PMBUS_UT_WARN_LIMIT = 0x52, |
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PMBUS_UT_FAULT_LIMIT = 0x53, |
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PMBUS_UT_FAULT_RESPONSE = 0x54, |
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PMBUS_VIN_OV_FAULT_LIMIT = 0x55, |
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PMBUS_VIN_OV_FAULT_RESPONSE = 0x56, |
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PMBUS_VIN_OV_WARN_LIMIT = 0x57, |
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PMBUS_VIN_UV_WARN_LIMIT = 0x58, |
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PMBUS_VIN_UV_FAULT_LIMIT = 0x59, |
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PMBUS_IIN_OC_FAULT_LIMIT = 0x5B, |
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PMBUS_IIN_OC_WARN_LIMIT = 0x5D, |
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PMBUS_POUT_OP_FAULT_LIMIT = 0x68, |
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PMBUS_POUT_OP_WARN_LIMIT = 0x6A, |
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PMBUS_PIN_OP_WARN_LIMIT = 0x6B, |
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PMBUS_STATUS_BYTE = 0x78, |
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PMBUS_STATUS_WORD = 0x79, |
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PMBUS_STATUS_VOUT = 0x7A, |
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PMBUS_STATUS_IOUT = 0x7B, |
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PMBUS_STATUS_INPUT = 0x7C, |
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PMBUS_STATUS_TEMPERATURE = 0x7D, |
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PMBUS_STATUS_CML = 0x7E, |
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PMBUS_STATUS_OTHER = 0x7F, |
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PMBUS_STATUS_MFR_SPECIFIC = 0x80, |
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PMBUS_STATUS_FAN_12 = 0x81, |
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PMBUS_STATUS_FAN_34 = 0x82, |
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PMBUS_READ_VIN = 0x88, |
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PMBUS_READ_IIN = 0x89, |
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PMBUS_READ_VCAP = 0x8A, |
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PMBUS_READ_VOUT = 0x8B, |
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PMBUS_READ_IOUT = 0x8C, |
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PMBUS_READ_TEMPERATURE_1 = 0x8D, |
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PMBUS_READ_TEMPERATURE_2 = 0x8E, |
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PMBUS_READ_TEMPERATURE_3 = 0x8F, |
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PMBUS_READ_FAN_SPEED_1 = 0x90, |
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PMBUS_READ_FAN_SPEED_2 = 0x91, |
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PMBUS_READ_FAN_SPEED_3 = 0x92, |
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PMBUS_READ_FAN_SPEED_4 = 0x93, |
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PMBUS_READ_DUTY_CYCLE = 0x94, |
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PMBUS_READ_FREQUENCY = 0x95, |
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PMBUS_READ_POUT = 0x96, |
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PMBUS_READ_PIN = 0x97, |
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PMBUS_REVISION = 0x98, |
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PMBUS_MFR_ID = 0x99, |
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PMBUS_MFR_MODEL = 0x9A, |
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PMBUS_MFR_REVISION = 0x9B, |
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PMBUS_MFR_LOCATION = 0x9C, |
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PMBUS_MFR_DATE = 0x9D, |
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PMBUS_MFR_SERIAL = 0x9E, |
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PMBUS_MFR_VIN_MIN = 0xA0, |
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PMBUS_MFR_VIN_MAX = 0xA1, |
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PMBUS_MFR_IIN_MAX = 0xA2, |
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PMBUS_MFR_PIN_MAX = 0xA3, |
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PMBUS_MFR_VOUT_MIN = 0xA4, |
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PMBUS_MFR_VOUT_MAX = 0xA5, |
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PMBUS_MFR_IOUT_MAX = 0xA6, |
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PMBUS_MFR_POUT_MAX = 0xA7, |
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PMBUS_IC_DEVICE_ID = 0xAD, |
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PMBUS_IC_DEVICE_REV = 0xAE, |
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PMBUS_MFR_MAX_TEMP_1 = 0xC0, |
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PMBUS_MFR_MAX_TEMP_2 = 0xC1, |
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PMBUS_MFR_MAX_TEMP_3 = 0xC2, |
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/* |
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* Virtual registers. |
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* Useful to support attributes which are not supported by standard PMBus |
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* registers but exist as manufacturer specific registers on individual chips. |
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* Must be mapped to real registers in device specific code. |
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* |
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* Semantics: |
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* Virtual registers are all word size. |
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* READ registers are read-only; writes are either ignored or return an error. |
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* RESET registers are read/write. Reading reset registers returns zero |
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* (used for detection), writing any value causes the associated history to be |
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* reset. |
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* Virtual registers have to be handled in device specific driver code. Chip |
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* driver code returns non-negative register values if a virtual register is |
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* supported, or a negative error code if not. The chip driver may return |
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* -ENODATA or any other error code in this case, though an error code other |
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* than -ENODATA is handled more efficiently and thus preferred. Either case, |
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* the calling PMBus core code will abort if the chip driver returns an error |
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* code when reading or writing virtual registers. |
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*/ |
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PMBUS_VIRT_BASE = 0x100, |
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PMBUS_VIRT_READ_TEMP_AVG, |
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PMBUS_VIRT_READ_TEMP_MIN, |
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PMBUS_VIRT_READ_TEMP_MAX, |
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PMBUS_VIRT_RESET_TEMP_HISTORY, |
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PMBUS_VIRT_READ_VIN_AVG, |
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PMBUS_VIRT_READ_VIN_MIN, |
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PMBUS_VIRT_READ_VIN_MAX, |
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PMBUS_VIRT_RESET_VIN_HISTORY, |
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PMBUS_VIRT_READ_IIN_AVG, |
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PMBUS_VIRT_READ_IIN_MIN, |
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PMBUS_VIRT_READ_IIN_MAX, |
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PMBUS_VIRT_RESET_IIN_HISTORY, |
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PMBUS_VIRT_READ_PIN_AVG, |
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PMBUS_VIRT_READ_PIN_MIN, |
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PMBUS_VIRT_READ_PIN_MAX, |
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PMBUS_VIRT_RESET_PIN_HISTORY, |
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PMBUS_VIRT_READ_POUT_AVG, |
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PMBUS_VIRT_READ_POUT_MIN, |
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PMBUS_VIRT_READ_POUT_MAX, |
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PMBUS_VIRT_RESET_POUT_HISTORY, |
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PMBUS_VIRT_READ_VOUT_AVG, |
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PMBUS_VIRT_READ_VOUT_MIN, |
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PMBUS_VIRT_READ_VOUT_MAX, |
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PMBUS_VIRT_RESET_VOUT_HISTORY, |
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PMBUS_VIRT_READ_IOUT_AVG, |
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PMBUS_VIRT_READ_IOUT_MIN, |
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PMBUS_VIRT_READ_IOUT_MAX, |
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PMBUS_VIRT_RESET_IOUT_HISTORY, |
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PMBUS_VIRT_READ_TEMP2_AVG, |
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PMBUS_VIRT_READ_TEMP2_MIN, |
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PMBUS_VIRT_READ_TEMP2_MAX, |
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PMBUS_VIRT_RESET_TEMP2_HISTORY, |
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PMBUS_VIRT_READ_VMON, |
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PMBUS_VIRT_VMON_UV_WARN_LIMIT, |
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PMBUS_VIRT_VMON_OV_WARN_LIMIT, |
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PMBUS_VIRT_VMON_UV_FAULT_LIMIT, |
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PMBUS_VIRT_VMON_OV_FAULT_LIMIT, |
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PMBUS_VIRT_STATUS_VMON, |
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/* |
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* RPM and PWM Fan control |
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* |
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* Drivers wanting to expose PWM control must define the behaviour of |
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* PMBUS_VIRT_PWM_[1-4] and PMBUS_VIRT_PWM_ENABLE_[1-4] in the |
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* {read,write}_word_data callback. |
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* |
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* pmbus core provides a default implementation for |
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* PMBUS_VIRT_FAN_TARGET_[1-4]. |
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* |
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* TARGET, PWM and PWM_ENABLE members must be defined sequentially; |
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* pmbus core uses the difference between the provided register and |
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* it's _1 counterpart to calculate the FAN/PWM ID. |
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*/ |
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PMBUS_VIRT_FAN_TARGET_1, |
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PMBUS_VIRT_FAN_TARGET_2, |
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PMBUS_VIRT_FAN_TARGET_3, |
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PMBUS_VIRT_FAN_TARGET_4, |
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PMBUS_VIRT_PWM_1, |
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PMBUS_VIRT_PWM_2, |
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PMBUS_VIRT_PWM_3, |
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PMBUS_VIRT_PWM_4, |
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PMBUS_VIRT_PWM_ENABLE_1, |
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PMBUS_VIRT_PWM_ENABLE_2, |
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PMBUS_VIRT_PWM_ENABLE_3, |
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PMBUS_VIRT_PWM_ENABLE_4, |
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/* Samples for average |
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* |
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* Drivers wanting to expose functionality for changing the number of |
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* samples used for average values should implement support in |
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* {read,write}_word_data callback for either PMBUS_VIRT_SAMPLES if it |
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* applies to all types of measurements, or any number of specific |
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* PMBUS_VIRT_*_SAMPLES registers to allow for individual control. |
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*/ |
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PMBUS_VIRT_SAMPLES, |
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PMBUS_VIRT_IN_SAMPLES, |
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PMBUS_VIRT_CURR_SAMPLES, |
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PMBUS_VIRT_POWER_SAMPLES, |
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PMBUS_VIRT_TEMP_SAMPLES, |
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}; |
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/* |
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* OPERATION |
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*/ |
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#define PB_OPERATION_CONTROL_ON BIT(7) |
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/* |
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* WRITE_PROTECT |
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*/ |
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#define PB_WP_ALL BIT(7) /* all but WRITE_PROTECT */ |
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#define PB_WP_OP BIT(6) /* all but WP, OPERATION, PAGE */ |
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#define PB_WP_VOUT BIT(5) /* all but WP, OPERATION, PAGE, VOUT, ON_OFF */ |
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#define PB_WP_ANY (PB_WP_ALL | PB_WP_OP | PB_WP_VOUT) |
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/* |
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* CAPABILITY |
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*/ |
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#define PB_CAPABILITY_SMBALERT BIT(4) |
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#define PB_CAPABILITY_ERROR_CHECK BIT(7) |
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/* |
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* VOUT_MODE |
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*/ |
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#define PB_VOUT_MODE_MODE_MASK 0xe0 |
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#define PB_VOUT_MODE_PARAM_MASK 0x1f |
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#define PB_VOUT_MODE_LINEAR 0x00 |
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#define PB_VOUT_MODE_VID 0x20 |
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#define PB_VOUT_MODE_DIRECT 0x40 |
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/* |
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* Fan configuration |
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*/ |
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#define PB_FAN_2_PULSE_MASK (BIT(0) | BIT(1)) |
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#define PB_FAN_2_RPM BIT(2) |
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#define PB_FAN_2_INSTALLED BIT(3) |
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#define PB_FAN_1_PULSE_MASK (BIT(4) | BIT(5)) |
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#define PB_FAN_1_RPM BIT(6) |
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#define PB_FAN_1_INSTALLED BIT(7) |
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enum pmbus_fan_mode { percent = 0, rpm }; |
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/* |
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* STATUS_BYTE, STATUS_WORD (lower) |
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*/ |
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#define PB_STATUS_NONE_ABOVE BIT(0) |
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#define PB_STATUS_CML BIT(1) |
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#define PB_STATUS_TEMPERATURE BIT(2) |
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#define PB_STATUS_VIN_UV BIT(3) |
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#define PB_STATUS_IOUT_OC BIT(4) |
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#define PB_STATUS_VOUT_OV BIT(5) |
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#define PB_STATUS_OFF BIT(6) |
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#define PB_STATUS_BUSY BIT(7) |
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/* |
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* STATUS_WORD (upper) |
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*/ |
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#define PB_STATUS_UNKNOWN BIT(8) |
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#define PB_STATUS_OTHER BIT(9) |
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#define PB_STATUS_FANS BIT(10) |
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#define PB_STATUS_POWER_GOOD_N BIT(11) |
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#define PB_STATUS_WORD_MFR BIT(12) |
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#define PB_STATUS_INPUT BIT(13) |
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#define PB_STATUS_IOUT_POUT BIT(14) |
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#define PB_STATUS_VOUT BIT(15) |
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/* |
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* STATUS_IOUT |
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*/ |
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#define PB_POUT_OP_WARNING BIT(0) |
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#define PB_POUT_OP_FAULT BIT(1) |
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#define PB_POWER_LIMITING BIT(2) |
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#define PB_CURRENT_SHARE_FAULT BIT(3) |
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#define PB_IOUT_UC_FAULT BIT(4) |
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#define PB_IOUT_OC_WARNING BIT(5) |
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#define PB_IOUT_OC_LV_FAULT BIT(6) |
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#define PB_IOUT_OC_FAULT BIT(7) |
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/* |
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* STATUS_VOUT, STATUS_INPUT |
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*/ |
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#define PB_VOLTAGE_UV_FAULT BIT(4) |
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#define PB_VOLTAGE_UV_WARNING BIT(5) |
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#define PB_VOLTAGE_OV_WARNING BIT(6) |
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#define PB_VOLTAGE_OV_FAULT BIT(7) |
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/* |
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* STATUS_INPUT |
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*/ |
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#define PB_PIN_OP_WARNING BIT(0) |
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#define PB_IIN_OC_WARNING BIT(1) |
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#define PB_IIN_OC_FAULT BIT(2) |
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/* |
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* STATUS_TEMPERATURE |
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*/ |
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#define PB_TEMP_UT_FAULT BIT(4) |
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#define PB_TEMP_UT_WARNING BIT(5) |
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#define PB_TEMP_OT_WARNING BIT(6) |
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#define PB_TEMP_OT_FAULT BIT(7) |
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/* |
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* STATUS_FAN |
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*/ |
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#define PB_FAN_AIRFLOW_WARNING BIT(0) |
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#define PB_FAN_AIRFLOW_FAULT BIT(1) |
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#define PB_FAN_FAN2_SPEED_OVERRIDE BIT(2) |
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#define PB_FAN_FAN1_SPEED_OVERRIDE BIT(3) |
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#define PB_FAN_FAN2_WARNING BIT(4) |
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#define PB_FAN_FAN1_WARNING BIT(5) |
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#define PB_FAN_FAN2_FAULT BIT(6) |
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#define PB_FAN_FAN1_FAULT BIT(7) |
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/* |
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* CML_FAULT_STATUS |
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*/ |
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#define PB_CML_FAULT_OTHER_MEM_LOGIC BIT(0) |
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#define PB_CML_FAULT_OTHER_COMM BIT(1) |
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#define PB_CML_FAULT_PROCESSOR BIT(3) |
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#define PB_CML_FAULT_MEMORY BIT(4) |
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#define PB_CML_FAULT_PACKET_ERROR BIT(5) |
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#define PB_CML_FAULT_INVALID_DATA BIT(6) |
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#define PB_CML_FAULT_INVALID_COMMAND BIT(7) |
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enum pmbus_sensor_classes { |
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PSC_VOLTAGE_IN = 0, |
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PSC_VOLTAGE_OUT, |
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PSC_CURRENT_IN, |
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PSC_CURRENT_OUT, |
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PSC_POWER, |
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PSC_TEMPERATURE, |
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PSC_FAN, |
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PSC_PWM, |
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PSC_NUM_CLASSES /* Number of power sensor classes */ |
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}; |
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#define PMBUS_PAGES 32 /* Per PMBus specification */ |
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#define PMBUS_PHASES 8 /* Maximum number of phases per page */ |
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/* Functionality bit mask */ |
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#define PMBUS_HAVE_VIN BIT(0) |
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#define PMBUS_HAVE_VCAP BIT(1) |
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#define PMBUS_HAVE_VOUT BIT(2) |
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#define PMBUS_HAVE_IIN BIT(3) |
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#define PMBUS_HAVE_IOUT BIT(4) |
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#define PMBUS_HAVE_PIN BIT(5) |
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#define PMBUS_HAVE_POUT BIT(6) |
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#define PMBUS_HAVE_FAN12 BIT(7) |
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#define PMBUS_HAVE_FAN34 BIT(8) |
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#define PMBUS_HAVE_TEMP BIT(9) |
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#define PMBUS_HAVE_TEMP2 BIT(10) |
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#define PMBUS_HAVE_TEMP3 BIT(11) |
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#define PMBUS_HAVE_STATUS_VOUT BIT(12) |
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#define PMBUS_HAVE_STATUS_IOUT BIT(13) |
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#define PMBUS_HAVE_STATUS_INPUT BIT(14) |
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#define PMBUS_HAVE_STATUS_TEMP BIT(15) |
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#define PMBUS_HAVE_STATUS_FAN12 BIT(16) |
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#define PMBUS_HAVE_STATUS_FAN34 BIT(17) |
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#define PMBUS_HAVE_VMON BIT(18) |
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#define PMBUS_HAVE_STATUS_VMON BIT(19) |
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#define PMBUS_HAVE_PWM12 BIT(20) |
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#define PMBUS_HAVE_PWM34 BIT(21) |
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#define PMBUS_HAVE_SAMPLES BIT(22) |
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#define PMBUS_PHASE_VIRTUAL BIT(30) /* Phases on this page are virtual */ |
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#define PMBUS_PAGE_VIRTUAL BIT(31) /* Page is virtual */ |
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enum pmbus_data_format { linear = 0, direct, vid }; |
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enum vrm_version { vr11 = 0, vr12, vr13, imvp9, amd625mv }; |
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struct pmbus_driver_info { |
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int pages; /* Total number of pages */ |
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u8 phases[PMBUS_PAGES]; /* Number of phases per page */ |
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enum pmbus_data_format format[PSC_NUM_CLASSES]; |
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enum vrm_version vrm_version[PMBUS_PAGES]; /* vrm version per page */ |
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/* |
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* Support one set of coefficients for each sensor type |
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* Used for chips providing data in direct mode. |
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*/ |
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int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */ |
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int b[PSC_NUM_CLASSES]; /* offset */ |
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int R[PSC_NUM_CLASSES]; /* exponent */ |
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u32 func[PMBUS_PAGES]; /* Functionality, per page */ |
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u32 pfunc[PMBUS_PHASES];/* Functionality, per phase */ |
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/* |
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* The following functions map manufacturing specific register values |
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* to PMBus standard register values. Specify only if mapping is |
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* necessary. |
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* Functions return the register value (read) or zero (write) if |
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* successful. A return value of -ENODATA indicates that there is no |
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* manufacturer specific register, but that a standard PMBus register |
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* may exist. Any other negative return value indicates that the |
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* register does not exist, and that no attempt should be made to read |
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* the standard register. |
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*/ |
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int (*read_byte_data)(struct i2c_client *client, int page, int reg); |
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int (*read_word_data)(struct i2c_client *client, int page, int phase, |
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int reg); |
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int (*write_word_data)(struct i2c_client *client, int page, int reg, |
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u16 word); |
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int (*write_byte)(struct i2c_client *client, int page, u8 value); |
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/* |
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* The identify function determines supported PMBus functionality. |
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* This function is only necessary if a chip driver supports multiple |
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* chips, and the chip functionality is not pre-determined. |
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*/ |
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int (*identify)(struct i2c_client *client, |
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struct pmbus_driver_info *info); |
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|
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/* Regulator functionality, if supported by this chip driver. */ |
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int num_regulators; |
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const struct regulator_desc *reg_desc; |
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|
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/* custom attributes */ |
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const struct attribute_group **groups; |
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}; |
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|
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/* Regulator ops */ |
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extern const struct regulator_ops pmbus_regulator_ops; |
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|
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/* Macro for filling in array of struct regulator_desc */ |
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#define PMBUS_REGULATOR(_name, _id) \ |
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[_id] = { \ |
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.name = (_name # _id), \ |
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.id = (_id), \ |
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.of_match = of_match_ptr(_name # _id), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.ops = &pmbus_regulator_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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} |
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|
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/* Function declarations */ |
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void pmbus_clear_cache(struct i2c_client *client); |
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int pmbus_set_page(struct i2c_client *client, int page, int phase); |
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int pmbus_read_word_data(struct i2c_client *client, int page, int phase, |
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u8 reg); |
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int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg, |
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u16 word); |
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int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg); |
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int pmbus_write_byte(struct i2c_client *client, int page, u8 value); |
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int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, |
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u8 value); |
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int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, |
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u8 mask, u8 value); |
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void pmbus_clear_faults(struct i2c_client *client); |
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bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg); |
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bool pmbus_check_word_register(struct i2c_client *client, int page, int reg); |
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int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info); |
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const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client |
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*client); |
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int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id, |
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enum pmbus_fan_mode mode); |
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int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id, |
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enum pmbus_fan_mode mode); |
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int pmbus_update_fan(struct i2c_client *client, int page, int id, |
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u8 config, u8 mask, u16 command); |
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struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client); |
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#endif /* PMBUS_H */
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