| 1 | // SPDX-License-Identifier: GPL-2.0+ |
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| 2 | /* |
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| 3 | * Hardware monitoring driver for Infineon IR38064 |
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| 4 | * |
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| 5 | * Copyright (c) 2017 Google Inc |
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| 6 | * |
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| 7 | * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16 |
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| 8 | * mode with exponent value -8 as direct mode with m=256/b=0/R=0. |
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| 9 | * |
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| 10 | * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however |
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| 11 | * this driver does not currently support them. |
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| 12 | */ |
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| 13 | |
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| 14 | #include <linux/err.h> |
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| 15 | #include <linux/i2c.h> |
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| 16 | #include <linux/init.h> |
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| 17 | #include <linux/kernel.h> |
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| 18 | #include <linux/module.h> |
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| 19 | #include <linux/of.h> |
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| 20 | #include <linux/regulator/driver.h> |
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| 21 | #include "pmbus.h" |
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| 22 | |
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| 23 | #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) |
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| 24 | static const struct regulator_desc ir38064_reg_desc[] = { |
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| 25 | PMBUS_REGULATOR("vout" , 0), |
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| 26 | }; |
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| 27 | #endif /* CONFIG_SENSORS_IR38064_REGULATOR */ |
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| 28 | |
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| 29 | static struct pmbus_driver_info ir38064_info = { |
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| 30 | .pages = 1, |
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| 31 | .format[PSC_VOLTAGE_IN] = linear, |
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| 32 | .format[PSC_VOLTAGE_OUT] = direct, |
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| 33 | .format[PSC_CURRENT_OUT] = linear, |
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| 34 | .format[PSC_POWER] = linear, |
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| 35 | .format[PSC_TEMPERATURE] = linear, |
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| 36 | .m[PSC_VOLTAGE_OUT] = 256, |
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| 37 | .b[PSC_VOLTAGE_OUT] = 0, |
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| 38 | .R[PSC_VOLTAGE_OUT] = 0, |
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| 39 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT |
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| 40 | | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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| 41 | | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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| 42 | | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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| 43 | | PMBUS_HAVE_POUT, |
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| 44 | #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR) |
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| 45 | .num_regulators = 1, |
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| 46 | .reg_desc = ir38064_reg_desc, |
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| 47 | #endif |
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| 48 | }; |
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| 49 | |
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| 50 | static int ir38064_probe(struct i2c_client *client) |
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| 51 | { |
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| 52 | return pmbus_do_probe(client, info: &ir38064_info); |
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| 53 | } |
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| 54 | |
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| 55 | static const struct i2c_device_id ir38064_id[] = { |
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| 56 | {"ir38060" , 0}, |
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| 57 | {"ir38064" , 0}, |
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| 58 | {"ir38164" , 0}, |
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| 59 | {"ir38263" , 0}, |
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| 60 | {} |
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| 61 | }; |
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| 62 | |
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| 63 | MODULE_DEVICE_TABLE(i2c, ir38064_id); |
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| 64 | |
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| 65 | static const struct of_device_id __maybe_unused ir38064_of_match[] = { |
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| 66 | { .compatible = "infineon,ir38060" }, |
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| 67 | { .compatible = "infineon,ir38064" }, |
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| 68 | { .compatible = "infineon,ir38164" }, |
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| 69 | { .compatible = "infineon,ir38263" }, |
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| 70 | {} |
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| 71 | }; |
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| 72 | |
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| 73 | MODULE_DEVICE_TABLE(of, ir38064_of_match); |
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| 74 | |
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| 75 | /* This is the driver that will be inserted */ |
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| 76 | static struct i2c_driver ir38064_driver = { |
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| 77 | .driver = { |
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| 78 | .name = "ir38064" , |
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| 79 | .of_match_table = of_match_ptr(ir38064_of_match), |
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| 80 | }, |
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| 81 | .probe = ir38064_probe, |
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| 82 | .id_table = ir38064_id, |
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| 83 | }; |
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| 84 | |
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| 85 | module_i2c_driver(ir38064_driver); |
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| 86 | |
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| 87 | MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>" ); |
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| 88 | MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips" ); |
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| 89 | MODULE_LICENSE("GPL" ); |
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| 90 | MODULE_IMPORT_NS(PMBUS); |
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| 91 | |
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