132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Hardware monitoring driver for BEL PFE family power supplies.
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*
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* Copyright (c) 2019 Facebook Inc.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pmbus.h>
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#include "pmbus.h"
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enum chips {pfe1100, pfe3000};
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/*
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* Disable status check for pfe3000 devices, because some devices report
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* communication error (invalid command) for VOUT_MODE command (0x20)
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* although correct VOUT_MODE (0x16) is returned: it leads to incorrect
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* exponent in linear mode.
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*/
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static struct pmbus_platform_data pfe3000_plat_data = {
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.flags = PMBUS_SKIP_STATUS_CHECK,
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};
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static struct pmbus_driver_info pfe_driver_info[] = {
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[pfe1100] = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = linear,
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.format[PSC_CURRENT_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_FAN] = linear,
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_POUT |
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PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
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PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
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PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_FAN12,
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},
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[pfe3000] = {
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.pages = 7,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = linear,
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.format[PSC_CURRENT_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_FAN] = linear,
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/* Page 0: V1. */
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_POUT | PMBUS_HAVE_FAN12 |
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PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
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PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
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PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_VCAP,
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/* Page 1: Vsb. */
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.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_POUT,
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/*
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* Page 2: V1 Ishare.
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* Page 3: Reserved.
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* Page 4: V1 Cathode.
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* Page 5: Vsb Cathode.
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* Page 6: V1 Sense.
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*/
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.func[2] = PMBUS_HAVE_VOUT,
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.func[4] = PMBUS_HAVE_VOUT,
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.func[5] = PMBUS_HAVE_VOUT,
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.func[6] = PMBUS_HAVE_VOUT,
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},
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};
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static const struct i2c_device_id pfe_device_id[];
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static int pfe_pmbus_probe(struct i2c_client *client)
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{
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int model;
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model = (int)i2c_match_id(pfe_device_id, client)->driver_data;
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/*
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* PFE3000-12-069RA devices may not stay in page 0 during device
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* probe which leads to probe failure (read status word failed).
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* So let's set the device to page 0 at the beginning.
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*/
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if (model == pfe3000) {
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client->dev.platform_data = &pfe3000_plat_data;
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i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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}
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return pmbus_do_probe(client, &pfe_driver_info[model]);
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}
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static const struct i2c_device_id pfe_device_id[] = {
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{"pfe1100", pfe1100},
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{"pfe3000", pfe3000},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, pfe_device_id);
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static struct i2c_driver pfe_pmbus_driver = {
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.driver = {
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.name = "bel-pfe",
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},
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.probe_new = pfe_pmbus_probe,
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.id_table = pfe_device_id,
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};
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module_i2c_driver(pfe_pmbus_driver);
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MODULE_AUTHOR("Tao Ren <rentao.bupt@gmail.com>");
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MODULE_DESCRIPTION("PMBus driver for BEL PFE Family Power Supplies");
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MODULE_LICENSE("GPL");
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