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 <linux/of.h> 20 #include <linux/regulator/driver.h> 21 #include "pmbus.h" 22 23 #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) 24 static const struct regulator_desc ir38064_reg_desc[] = { 25 PMBUS_REGULATOR_ONE("vout"), 26 }; 27 #endif /* CONFIG_SENSORS_IR38064_REGULATOR */ 28 29 static struct pmbus_driver_info ir38064_info = { 30 .pages = 1, 31 .format[PSC_VOLTAGE_IN] = linear, 32 .format[PSC_VOLTAGE_OUT] = direct, 33 .format[PSC_CURRENT_OUT] = linear, 34 .format[PSC_POWER] = linear, 35 .format[PSC_TEMPERATURE] = linear, 36 .m[PSC_VOLTAGE_OUT] = 256, 37 .b[PSC_VOLTAGE_OUT] = 0, 38 .R[PSC_VOLTAGE_OUT] = 0, 39 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT 40 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP 41 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT 42 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT 43 | PMBUS_HAVE_POUT, 44 #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) 45 .num_regulators = 1, 46 .reg_desc = ir38064_reg_desc, 47 #endif 48 }; 49 50 static int ir38064_probe(struct i2c_client *client) 51 { 52 return pmbus_do_probe(client, &ir38064_info); 53 } 54 55 static const struct i2c_device_id ir38064_id[] = { 56 {"ir38060"}, 57 {"ir38064"}, 58 {"ir38164"}, 59 {"ir38263"}, 60 {} 61 }; 62 63 MODULE_DEVICE_TABLE(i2c, ir38064_id); 64 65 static const struct of_device_id __maybe_unused ir38064_of_match[] = { 66 { .compatible = "infineon,ir38060" }, 67 { .compatible = "infineon,ir38064" }, 68 { .compatible = "infineon,ir38164" }, 69 { .compatible = "infineon,ir38263" }, 70 {} 71 }; 72 73 MODULE_DEVICE_TABLE(of, ir38064_of_match); 74 75 /* This is the driver that will be inserted */ 76 static struct i2c_driver ir38064_driver = { 77 .driver = { 78 .name = "ir38064", 79 .of_match_table = of_match_ptr(ir38064_of_match), 80 }, 81 .probe = ir38064_probe, 82 .id_table = ir38064_id, 83 }; 84 85 module_i2c_driver(ir38064_driver); 86 87 MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>"); 88 MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips"); 89 MODULE_LICENSE("GPL"); 90 MODULE_IMPORT_NS(PMBUS); 91