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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Hardware monitoring driver for MP5920 and compatible chips.4 */5 6#include <linux/i2c.h>7#include <linux/minmax.h>8#include <linux/module.h>9#include <linux/of_device.h>10#include "pmbus.h"11 12static struct pmbus_driver_info mp5920_info = {13 .pages = 1,14 .format[PSC_VOLTAGE_IN] = direct,15 .format[PSC_VOLTAGE_OUT] = direct,16 .format[PSC_CURRENT_OUT] = direct,17 .format[PSC_POWER] = direct,18 .format[PSC_TEMPERATURE] = direct,19 .m[PSC_VOLTAGE_IN] = 2266,20 .b[PSC_VOLTAGE_IN] = 0,21 .R[PSC_VOLTAGE_IN] = -1,22 .m[PSC_VOLTAGE_OUT] = 2266,23 .b[PSC_VOLTAGE_OUT] = 0,24 .R[PSC_VOLTAGE_OUT] = -1,25 .m[PSC_CURRENT_OUT] = 546,26 .b[PSC_CURRENT_OUT] = 0,27 .R[PSC_CURRENT_OUT] = -2,28 .m[PSC_POWER] = 5840,29 .b[PSC_POWER] = 0,30 .R[PSC_POWER] = -3,31 .m[PSC_TEMPERATURE] = 1067,32 .b[PSC_TEMPERATURE] = 20500,33 .R[PSC_TEMPERATURE] = -2,34 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |35 PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT |36 PMBUS_HAVE_TEMP,37};38 39static int mp5920_probe(struct i2c_client *client)40{41 struct device *dev = &client->dev;42 int ret;43 u8 buf[I2C_SMBUS_BLOCK_MAX];44 45 if (!i2c_check_functionality(client->adapter,46 I2C_FUNC_SMBUS_READ_WORD_DATA))47 return -ENODEV;48 49 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);50 if (ret < 0)51 return dev_err_probe(dev, ret, "Failed to read PMBUS_MFR_MODEL\n");52 53 if (ret != 6 || strncmp(buf, "MP5920", 6)) {54 return dev_err_probe(dev, -ENODEV, "Model '%.*s' not supported\n",55 min_t(int, ret, sizeof(buf)), buf);56 }57 58 return pmbus_do_probe(client, &mp5920_info);59}60 61static const struct of_device_id mp5920_of_match[] = {62 { .compatible = "mps,mp5920" },63 { }64};65 66MODULE_DEVICE_TABLE(of, mp5920_of_match);67 68static const struct i2c_device_id mp5920_id[] = {69 { "mp5920" },70 { }71};72 73MODULE_DEVICE_TABLE(i2c, mp5920_id);74 75static struct i2c_driver mp5920_driver = {76 .driver = {77 .name = "mp5920",78 .of_match_table = mp5920_of_match,79 },80 .probe = mp5920_probe,81 .id_table = mp5920_id,82};83 84module_i2c_driver(mp5920_driver);85 86MODULE_AUTHOR("Tony Ao <tony_ao@wiwynn.com>");87MODULE_AUTHOR("Alex Vdovydchenko <xzeol@yahoo.com>");88MODULE_DESCRIPTION("PMBus driver for MP5920 HSC");89MODULE_LICENSE("GPL");90MODULE_IMPORT_NS(PMBUS);91