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114 lines
2.7 KiB
114 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Hardware monitoring driver for Maxim MAX16064 |
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* |
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* Copyright (c) 2011 Ericsson AB. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include "pmbus.h" |
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#define MAX16064_MFR_VOUT_PEAK 0xd4 |
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#define MAX16064_MFR_TEMPERATURE_PEAK 0xd6 |
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static int max16064_read_word_data(struct i2c_client *client, int page, |
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int phase, int reg) |
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{ |
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int ret; |
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switch (reg) { |
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case PMBUS_VIRT_READ_VOUT_MAX: |
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ret = pmbus_read_word_data(client, page, phase, |
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MAX16064_MFR_VOUT_PEAK); |
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break; |
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case PMBUS_VIRT_READ_TEMP_MAX: |
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ret = pmbus_read_word_data(client, page, phase, |
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MAX16064_MFR_TEMPERATURE_PEAK); |
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break; |
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case PMBUS_VIRT_RESET_VOUT_HISTORY: |
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case PMBUS_VIRT_RESET_TEMP_HISTORY: |
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ret = 0; |
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break; |
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default: |
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ret = -ENODATA; |
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break; |
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} |
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return ret; |
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} |
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static int max16064_write_word_data(struct i2c_client *client, int page, |
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int reg, u16 word) |
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{ |
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int ret; |
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switch (reg) { |
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case PMBUS_VIRT_RESET_VOUT_HISTORY: |
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ret = pmbus_write_word_data(client, page, |
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MAX16064_MFR_VOUT_PEAK, 0); |
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break; |
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case PMBUS_VIRT_RESET_TEMP_HISTORY: |
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ret = pmbus_write_word_data(client, page, |
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MAX16064_MFR_TEMPERATURE_PEAK, |
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0xffff); |
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break; |
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default: |
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ret = -ENODATA; |
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break; |
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} |
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return ret; |
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} |
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static struct pmbus_driver_info max16064_info = { |
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.pages = 4, |
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.format[PSC_VOLTAGE_IN] = direct, |
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.format[PSC_VOLTAGE_OUT] = direct, |
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.format[PSC_TEMPERATURE] = direct, |
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.m[PSC_VOLTAGE_IN] = 19995, |
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.b[PSC_VOLTAGE_IN] = 0, |
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.R[PSC_VOLTAGE_IN] = -1, |
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.m[PSC_VOLTAGE_OUT] = 19995, |
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.b[PSC_VOLTAGE_OUT] = 0, |
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.R[PSC_VOLTAGE_OUT] = -1, |
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.m[PSC_TEMPERATURE] = -7612, |
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.b[PSC_TEMPERATURE] = 335, |
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.R[PSC_TEMPERATURE] = -3, |
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP |
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| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP, |
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.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
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.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
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.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
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.read_word_data = max16064_read_word_data, |
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.write_word_data = max16064_write_word_data, |
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}; |
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static int max16064_probe(struct i2c_client *client) |
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{ |
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return pmbus_do_probe(client, &max16064_info); |
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} |
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static const struct i2c_device_id max16064_id[] = { |
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{"max16064", 0}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, max16064_id); |
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/* This is the driver that will be inserted */ |
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static struct i2c_driver max16064_driver = { |
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.driver = { |
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.name = "max16064", |
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}, |
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.probe_new = max16064_probe, |
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.id_table = max16064_id, |
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}; |
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module_i2c_driver(max16064_driver); |
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MODULE_AUTHOR("Guenter Roeck"); |
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MODULE_DESCRIPTION("PMBus driver for Maxim MAX16064"); |
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MODULE_LICENSE("GPL"); |
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MODULE_IMPORT_NS(PMBUS);
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