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132 lines
3.4 KiB
132 lines
3.4 KiB
// 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 <[email protected]>"); |
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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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MODULE_IMPORT_NS(PMBUS);
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