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146 lines
3.9 KiB
146 lines
3.9 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Hardware monitoring driver for Vicor PLI1209BC Digital Supervisor |
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* |
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* Copyright (c) 2022 9elements GmbH |
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*/ |
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#include <linux/i2c.h> |
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#include <linux/module.h> |
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#include <linux/pmbus.h> |
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#include <linux/regulator/driver.h> |
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#include "pmbus.h" |
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/* |
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* The capability command is only supported at page 0. Probing the device while |
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* the page register is set to 1 will falsely enable PEC support. Disable |
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* capability probing accordingly, since the PLI1209BC does not have any |
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* additional capabilities. |
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*/ |
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static struct pmbus_platform_data pli1209bc_plat_data = { |
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.flags = PMBUS_NO_CAPABILITY, |
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}; |
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static int pli1209bc_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 data; |
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switch (reg) { |
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/* PMBUS_READ_POUT uses a direct format with R=0 */ |
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case PMBUS_READ_POUT: |
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data = pmbus_read_word_data(client, page, phase, reg); |
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if (data < 0) |
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return data; |
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data = sign_extend32(data, 15) * 10; |
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return clamp_val(data, -32768, 32767) & 0xffff; |
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/* |
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* PMBUS_READ_VOUT and PMBUS_READ_TEMPERATURE_1 return invalid data |
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* when the BCM is turned off. Since it is not possible to return |
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* ENODATA error, return zero instead. |
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*/ |
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case PMBUS_READ_VOUT: |
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case PMBUS_READ_TEMPERATURE_1: |
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data = pmbus_read_word_data(client, page, phase, |
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PMBUS_STATUS_WORD); |
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if (data < 0) |
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return data; |
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if (data & PB_STATUS_POWER_GOOD_N) |
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return 0; |
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return pmbus_read_word_data(client, page, phase, reg); |
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default: |
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return -ENODATA; |
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} |
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} |
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#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR) |
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static const struct regulator_desc pli1209bc_reg_desc = { |
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.name = "vout2", |
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.id = 1, |
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.of_match = of_match_ptr("vout2"), |
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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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#endif |
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static struct pmbus_driver_info pli1209bc_info = { |
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.pages = 2, |
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.format[PSC_VOLTAGE_IN] = direct, |
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.format[PSC_VOLTAGE_OUT] = direct, |
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.format[PSC_CURRENT_IN] = direct, |
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.format[PSC_CURRENT_OUT] = direct, |
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.format[PSC_POWER] = direct, |
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.format[PSC_TEMPERATURE] = direct, |
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.m[PSC_VOLTAGE_IN] = 1, |
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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] = 1, |
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.b[PSC_VOLTAGE_OUT] = 0, |
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.R[PSC_VOLTAGE_OUT] = 1, |
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.m[PSC_CURRENT_IN] = 1, |
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.b[PSC_CURRENT_IN] = 0, |
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.R[PSC_CURRENT_IN] = 3, |
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.m[PSC_CURRENT_OUT] = 1, |
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.b[PSC_CURRENT_OUT] = 0, |
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.R[PSC_CURRENT_OUT] = 2, |
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.m[PSC_POWER] = 1, |
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.b[PSC_POWER] = 0, |
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.R[PSC_POWER] = 1, |
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.m[PSC_TEMPERATURE] = 1, |
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.b[PSC_TEMPERATURE] = 0, |
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.R[PSC_TEMPERATURE] = 0, |
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/* |
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* Page 0 sums up all attributes except voltage readings. |
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* The pli1209 digital supervisor only contains a single BCM, making |
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* page 0 redundant. |
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*/ |
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.func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |
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| PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT |
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| PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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| PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT, |
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.read_word_data = pli1209bc_read_word_data, |
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#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR) |
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.num_regulators = 1, |
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.reg_desc = &pli1209bc_reg_desc, |
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#endif |
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}; |
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static int pli1209bc_probe(struct i2c_client *client) |
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{ |
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client->dev.platform_data = &pli1209bc_plat_data; |
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return pmbus_do_probe(client, &pli1209bc_info); |
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} |
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static const struct i2c_device_id pli1209bc_id[] = { |
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{"pli1209bc", 0}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, pli1209bc_id); |
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#ifdef CONFIG_OF |
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static const struct of_device_id pli1209bc_of_match[] = { |
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{ .compatible = "vicor,pli1209bc" }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, pli1209bc_of_match); |
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#endif |
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static struct i2c_driver pli1209bc_driver = { |
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.driver = { |
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.name = "pli1209bc", |
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.of_match_table = of_match_ptr(pli1209bc_of_match), |
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}, |
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.probe_new = pli1209bc_probe, |
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.id_table = pli1209bc_id, |
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}; |
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module_i2c_driver(pli1209bc_driver); |
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MODULE_AUTHOR("Marcello Sylvester Bauer <[email protected]>"); |
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MODULE_DESCRIPTION("PMBus driver for Vicor PLI1209BC"); |
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MODULE_LICENSE("GPL"); |
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MODULE_IMPORT_NS(PMBUS);
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