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