1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Hardware monitoring driver for Infineon IR38064 4 * 5 * Copyright (c) 2017 Google Inc 6 * 7 * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16 8 * mode with exponent value -8 as direct mode with m=256/b=0/R=0. 9 * 10 * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however 11 * this driver does not currently support them. 12 */ 13 14 #include <linux/err.h> 15 #include <linux/i2c.h> 16 #include <linux/init.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include "pmbus.h" 20 21 static struct pmbus_driver_info ir38064_info = { 22 .pages = 1, 23 .format[PSC_VOLTAGE_IN] = linear, 24 .format[PSC_VOLTAGE_OUT] = direct, 25 .format[PSC_CURRENT_OUT] = linear, 26 .format[PSC_POWER] = linear, 27 .format[PSC_TEMPERATURE] = linear, 28 .m[PSC_VOLTAGE_OUT] = 256, 29 .b[PSC_VOLTAGE_OUT] = 0, 30 .R[PSC_VOLTAGE_OUT] = 0, 31 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT 32 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP 33 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT 34 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT 35 | PMBUS_HAVE_POUT, 36 }; 37 38 static int ir38064_probe(struct i2c_client *client, 39 const struct i2c_device_id *id) 40 { 41 return pmbus_do_probe(client, id, &ir38064_info); 42 } 43 44 static const struct i2c_device_id ir38064_id[] = { 45 {"ir38064", 0}, 46 {} 47 }; 48 49 MODULE_DEVICE_TABLE(i2c, ir38064_id); 50 51 /* This is the driver that will be inserted */ 52 static struct i2c_driver ir38064_driver = { 53 .driver = { 54 .name = "ir38064", 55 }, 56 .probe = ir38064_probe, 57 .remove = pmbus_do_remove, 58 .id_table = ir38064_id, 59 }; 60 61 module_i2c_driver(ir38064_driver); 62 63 MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>"); 64 MODULE_DESCRIPTION("PMBus driver for Infineon IR38064"); 65 MODULE_LICENSE("GPL"); 66